WO2011134305A1

WO2011134305A1 - Data transmission method, system, intermediate node and source node in cooperative relay network

Info

Publication number: WO2011134305A1
Application number: PCT/CN2011/071286
Authority: WO
Inventors: 张洁涛; 阿克拉姆·塞勒姆·本塞迪克; 佩塔尔·久基奇; 哈林姆·亚纳克梅尔奥卢
Original assignee: 华为技术有限公司
Priority date: 2010-04-26
Filing date: 2011-02-25
Publication date: 2011-11-03
Also published as: CN102237988B; CN102237988A

Abstract

The present invention provides a data transmission method, a system, an intermediate node and a source node in a cooperative relay network. The data transmission method in the cooperative relay network includes that the intermediate node receives the data transmitted from the source node through a first non-uniform constellation diagram (101), the intermediate node transmits the data to the destination node through a second non-uniform constellation diagram, the constellation point information in the first non-uniform constellation diagram and the second non-uniform constellation diagram is pre-obtained by minimizing decode symbol error rate limit, the constellation point information includes a mapping relation between a constellation point location and a code bit sequence corresponding to each constellation point, and the distances between the neighbor constellation points in the first non-uniform constellation diagram and the second non-uniform constellation diagram are not all equivalent (102). The present invention realizes data transmission through non-uniform constellation diagram in the case of requiring two transmissions, the decode error symbol rate is decreased, and the decode performance is improved.

Description

协作中继网絡中的数据传输方法、 ***、中间节点和源节点本申请要求于 2010年 4月 26日提交中国专利局，申请号为 201010159054.4, 发明名称为"协作中继网络中的数据传输方法、 ***、中间节点和源节点"的中国专利申请的优先权，其全部内容通过引用结合在本申请中。技术领域 Data transmission method, system, intermediate node and source node in cooperative relay network The application is submitted to the Chinese Patent Office on April 26, 2010, and the application number is 201010159054.4, and the invention name is "data transmission method in cooperative relay network" The priority of the Chinese patent application, the system, the intermediate node and the source node, the entire contents of which are hereby incorporated by reference. Technical field

本发明实施例涉及通信技术领域，尤其涉及一种协作中继网络中的数据传输方法、 ***、中间节点和源节点。 The embodiments of the present invention relate to the field of communications technologies, and in particular, to a data transmission method, system, intermediate node, and source node in a cooperative relay network.

背景技术 Background technique

中继技术能有效地提升蜂窝小区用户的速率，从而提高***容量；且能有效延伸蜂窝网的覆盖。在中继应用中，最常用的是固定中继场景，即中继站 ( Relay Station; 以下简称： RS )被安放在蜂窝小区内特定的地理位置， RS和小区基站（Base Station; 以下简称： BS )之间具有良好的信道条件，能提升蜂窝小区的覆盖率和速率。当用户终端（User Terminal; 以下简称： UT )位于蜂窝小区内时，不仅能和 BS进行通信，还能借助 RS来增强信号，此时可通过协作传输的方式实现两路信号的合并，从而提供更可靠的传输。 The relay technology can effectively increase the rate of the cell user, thereby increasing the system capacity; and effectively extending the coverage of the cellular network. In the relay application, the most commonly used is the fixed relay scenario, that is, the relay station (hereinafter referred to as RS) is placed in a specific geographical location within the cell, and the RS and the cell site (Base Station; hereinafter referred to as BS) There are good channel conditions between them, which can improve the coverage and rate of the cell. When the user terminal (User Terminal; hereinafter referred to as: UT) is located in the cell, it can not only communicate with the BS, but also enhance the signal by means of the RS. At this time, the two signals can be combined by means of cooperative transmission, thereby providing More reliable transmission.

星座重排（ Constellation Rearrangement; 以下简称： CoRe )技术是指在对同一数据在不同时间发送时釆用不同的星座图映射 ,从而改善接收信号的误比特率（ Bit Error Rate; 以下简称： BER )或误符号率（ Symbol Error Rate; 以下简称： SER )性能。 CoRe技术最早应用在数据重传中，即数据在重传时使用的星座图与在第一次传输时使用的星座图不同，从而改善数据在重传后合并解码时的性能。在协作传输中，可进一步利用 CoRe技术来实现数据的可靠性传输。具体地，源节点在发送数据时使用特定的星座图映射方法，中继节点解码源节点发送的数据后在协作传输时使用另一种星座图映射方法进行协作传输，提高目的节点在合并解码时的性能。 Constellation Rearrangement (hereinafter referred to as CoRe) technology refers to using different constellation mappings when transmitting the same data at different times, thereby improving the bit error rate of the received signal (Ber Error Rate; BER) Or Symbol Error Rate (hereinafter referred to as: SER) performance. The CoRe technology was first applied in data retransmission, that is, the constellation used by the data in retransmission is different from the constellation used in the first transmission, thereby improving the performance of the data after the retransmission and decoding. In cooperative transmission, CoRe technology can be further utilized to achieve reliable transmission of data. Specifically, the source node uses a specific constellation mapping method when transmitting data, and the relay node decodes the data sent by the source node and uses another constellation mapping method for cooperative transmission during cooperative transmission, thereby improving the destination node in the combined decoding. Performance.

现有技术提供的在协作传输中应用 CoRe技术的方法均使用均勾的星座图映射方法。在协作传输场景，源节点和中继节点传输时均使用均匀的星座图映射方法。这种方法在传统的单跳传输或混合自动重传请求（Hybrid Automatic Repeat Request; 以下简称： HARQ )中第一次传输的解码性能是最优的，但第二次传输的解码性能则欠佳。在需要两次传输的场景，例如协作传输场景下，均匀的星座图映射方法的解码性能较低。 The methods for applying CoRe technology in cooperative transmission provided by the prior art all use a constellation mapping method. In a cooperative transmission scenario, both the source node and the relay node use a uniform constellation map. Shooting method. This method is optimal for the first transmission in the traditional single-hop transmission or hybrid automatic repeat request (Hybrid Automatic Repeat Request; HARQ), but the decoding performance of the second transmission is poor. . In scenarios where two transmissions are required, such as cooperative transmission scenarios, the uniform constellation mapping method has lower decoding performance.

发明内容 Summary of the invention

本发明实施例提供一种协作中继网络中的数据传输方法、 ***、中间节点和源节点，以提高解码性能。 Embodiments of the present invention provide a data transmission method, system, intermediate node, and source node in a cooperative relay network to improve decoding performance.

本发明实施例提供一种协作中继网络中的数据传输方法，包括：中间节点接收源节点通过第一非均匀星座图发送的数据； An embodiment of the present invention provides a data transmission method in a cooperative relay network, including: an intermediate node receives data sent by a source node through a first non-uniform constellation;

所述中间节点将所述数据通过第二非均匀星座图发送给目的节点，所述第一非均勾星座图和所述第二非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第一非均匀星座图和所述第二非均匀星座图中相邻星座点之间的距离不完全相等。 Transmitting, by the intermediate node, the data to the destination node by using the second non-uniform constellation, and the constellation point information in the first non-uniform constellation and the second non-equal constellation are minimized by decoding symbol error The rate limit is obtained in advance, and the constellation point information includes a mapping relationship between a constellation point position and a coded bit sequence corresponding to each constellation point; and the first non-uniform constellation and the adjacent constellation in the second non-uniform constellation The distance between points is not exactly equal.

本发明实施例还提供一种数据传输方法，包括： The embodiment of the invention further provides a data transmission method, including:

源节点通过第三非均匀星座图将数据发送给目的节点； The source node sends data to the destination node through the third non-uniform constellation;

所述源节点接收所述目的节点在所述数据接收失败时发送的重传指示；所述源节点根据所述重传指示通过第四非均勾星座图将所述数据发送给所述目的节点，所述第三非均匀星座图和所述第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第三非均勾星座图和所述第四非均匀星座图中相邻星座点之间的距离不完全相等。本发明实施例还提供一种中间节点，包括： The source node receives a retransmission indication sent by the destination node when the data reception fails; the source node sends the data to the destination node by using a fourth non-uniform hook constellation according to the retransmission indication. And constelling point information in the third non-uniform constellation and the fourth non-uniform constellation are obtained in advance by minimizing a decoding symbol error rate, where the constellation point information includes a constellation point position and a corresponding corresponding to each constellation point a mapping relationship of coded bit sequences; the distance between adjacent constellation points in the third non-uniform constellation and the fourth non-uniform constellation is not completely equal. An embodiment of the present invention further provides an intermediate node, including:

第一接收模块，用于接收源节点通过第一非均匀星座图发送的数据；第一发送模块，用于将所述第一接收模块接收的数据通过第二非均勾星座图发送给目的节点，所述第一非均匀星座图和所述第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第一非均勾星座图和所述第二非均匀星座图中相邻星座点之间的距离不完全相等。 a first receiving module, configured to receive data that is sent by the source node by using the first non-uniform constellation; and the first sending module is configured to send the data received by the first receiving module to the destination node by using the second non-uniform constellation a first non-uniform constellation and a constellation in the second non-uniform constellation The point information is obtained in advance by minimizing a decoding symbol error rate limit, and the constellation point information includes a mapping relationship between a constellation point position and a coded bit sequence corresponding to each constellation point; the first non-uniform hook constellation and the first The distances between adjacent constellation points in the two non-uniform constellation diagrams are not completely equal.

本发明实施例还提供一种协作中继***，包括：中间节点、源节点和目的节点； An embodiment of the present invention further provides a cooperative relay system, including: an intermediate node, a source node, and a destination node;

所述源节点，用于通过第一非均匀星座图将数据发送给所述中间节点，并通过所述第一非均勾星座图将所述数据发送给所述目的节点； The source node is configured to send data to the intermediate node by using a first non-uniform constellation, and send the data to the destination node by using the first non-uniform constellation map;

所述中间节点，用于接收所述源节点通过第一非均匀星座图发送的数据，并将所述数据通过第二非均勾星座图发送给所述目的节点，所述第一非均匀星座图和所述第二非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第一非均匀星座图和所述第二非均匀星座图中相邻星座点之间的距离不完全相等； The intermediate node is configured to receive data sent by the source node by using a first non-uniform constellation, and send the data to the destination node by using a second non-uniform constellation, the first non-uniform constellation The constellation point information in the figure and the second non-equal constellation constellation is obtained in advance by minimizing a decoding symbol error rate limit, and the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point. The distance between adjacent constellation points in the first non-uniform constellation and the second non-uniform constellation is not completely equal;

所述目的节点，用于接收所述源节点和所述中间节点发送的数据。 The destination node is configured to receive data sent by the source node and the intermediate node.

本发明实施例还提供一种源节点，包括： The embodiment of the invention further provides a source node, including:

第三发送模块，用于通过第三非均勾星座图将数据发送给目的节点；第三接收模块，用于接收所述目的节点在所述数据接收失败时发送的重传指示； a third sending module, configured to send data to the destination node by using a third non-uniform constellation map; and a third receiving module, configured to receive a retransmission indication sent by the destination node when the data reception fails;

第四发送模块，用于根据所述第三接收模块接收的重传指示通过第四非均勾星座图将所述数据发送给所述目的节点，所述第三非均勾星座图和所述第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第三非均匀星座图和所述第四非均匀星座图中相邻星座点之间的距离不完全相等。 a fourth sending module, configured to send the data to the destination node by using a fourth non-uniform hook constellation according to the retransmission indication received by the third receiving module, the third non-uniform constellation diagram and the The constellation point information in the fourth non-uniform constellation is obtained in advance by minimizing a decoding symbol error rate limit, and the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; The distance between adjacent constellation points in the non-uniform constellation and the fourth non-uniform constellation is not completely equal.

通过本发明实施例，中间节点接收到源节点通过第一非均勾星座图发送的数据之后，将该数据通过第二非均匀星座图发送给目的节点；另外，源节点可以通过第三非均匀星座图将数据发送给目的节点，接收到目的节点在上述数据接收失败时发送的重传指示之后，根据重传指示通过第四非均勾星座图将上述数据发送给目的节点；其中，第一非均匀星座图、第二非均匀星座图、第三非均匀星座图和第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，该星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；本发明实施例实现了在需要两次传输的场景下，通过非均匀星座图传输数据，降低了解码的误符号率，提高了解码性能。附图说明 According to the embodiment of the present invention, after receiving the data sent by the source node through the first non-uniform constellation diagram, the intermediate node sends the data to the destination node through the second non-uniform constellation diagram; in addition, the source node may pass the third non-uniformity The constellation map sends the data to the destination node, and after receiving the retransmission indication sent by the destination node when the data reception fails, the fourth non-uniform hook constellation map is used according to the retransmission indication. Sending data to the destination node; wherein the constellation point information in the first non-uniform constellation, the second non-uniform constellation, the third non-uniform constellation, and the fourth non-uniform constellation are obtained in advance by minimizing a decoding symbol error rate The constellation point information includes a mapping relationship between the constellation point position and the coded bit sequence corresponding to each constellation point. The embodiment of the present invention implements the transmission of data through the non-uniform constellation in a scenario requiring two transmissions, thereby reducing decoding. The error rate of the symbol improves the decoding performance. DRAWINGS

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

图 1为本发明协作中继网络中的数据传输方法一个实施例的流程图；图 2为本发明协作中继网络中的数据传输方法一个应用场景的示意图；图 3为本发明实施例 16QAM调制在第一非均匀星座图中的星座点及其对应的调制符号； 1 is a flowchart of an embodiment of a data transmission method in a cooperative relay network according to the present invention; FIG. 2 is a schematic diagram of an application scenario of a data transmission method in a cooperative relay network according to the present invention; a constellation point in the first non-uniform constellation and its corresponding modulation symbol;

图 4为本发明实施例 16QAM调制在第二非均匀星座图中的星座点及其对应的调制符号； 4 is a constellation point of a 16QAM modulation in a second non-uniform constellation diagram and its corresponding modulation symbol according to an embodiment of the present invention;

图 5为本发明数据传输方法一个实施例的流程图； FIG. 5 is a flowchart of an embodiment of a data transmission method according to the present invention; FIG.

图 6为本发明中间节点一个实施例的结构示意图； 6 is a schematic structural diagram of an embodiment of an intermediate node according to the present invention;

图 7为本发明中间节点另一个实施例的结构示意图； 7 is a schematic structural diagram of another embodiment of an intermediate node according to the present invention;

图 8为本发明协作中继***一个实施例的结构示意图； 8 is a schematic structural diagram of an embodiment of a cooperative relay system according to the present invention;

图 9为本发明源节点一个实施例的结构示意图。具体实施方式 FIG. 9 is a schematic structural diagram of an embodiment of a source node according to the present invention. Detailed ways

为了使本领域技术人员能进一步了解本发明实施例的特征及技术内容，请参阅以下有关本发明实施例的详细说明与附图，附图仅提供参考与说明，并非用来限制本发明实施例。 The detailed description of the embodiments of the present invention and the accompanying drawings, which are in .

图 1为本发明协作中继网络中的数据传输方法一个实施例的流程图，如图 1 所示，该协作中继网络中的数据传输方法可以包括： 1 is a flow chart of an embodiment of a data transmission method in a cooperative relay network according to the present invention, as shown in FIG. 1 As shown, the data transmission method in the cooperative relay network may include:

步骤 101 , 中间节点接收源节点通过第一非均勾星座图发送的数据。 Step 101: The intermediate node receives data sent by the source node by using the first non-uniform hook constellation.

步骤 102, 中间节点将上述数据通过第二非均匀星座图发送给目的节点，第一非均勾星座图和第二非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得，该星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；第一非均匀星座图和第二非均匀星座图中相邻星座点之间的距离不完全相等。 Step 102: The intermediate node sends the foregoing data to the destination node by using the second non-uniform constellation, and the constellation point information in the first non-uniform constellation and the second non-equal constellation are obtained in advance by minimizing a decoding symbol error rate. The constellation point information includes a mapping relationship between the constellation point position and the coded bit sequence corresponding to each constellation point; the distance between adjacent constellation points in the first non-uniform constellation and the second non-uniform constellation is not completely equal.

本发明实施例中的非均匀星座图是指星座图中的星座点非均匀分布，即星座图中相邻星座点之间的距离不完全相等。 The non-uniform constellation diagram in the embodiment of the present invention refers to a non-uniform distribution of constellation points in the constellation diagram, that is, the distances between adjacent constellation points in the constellation diagram are not completely equal.

本实施例中，源节点还可以将上述数据通过第一非均匀星座图发送给目的节点。例如：在协作传输中，从源节点到目的节点的数据传输通常在两个时隙完成，其中在第一个时隙，源节点通过第一非均勾星座图将数据同时发送给中间节点和目的节点；在第二个时隙，中间节点将接收到的数据通过第二非均匀星座图发送给目的节点。在第二时隙末尾，目的节点将在上述两个时隙收到的信号进行合并解码。 In this embodiment, the source node may also send the foregoing data to the destination node through the first non-uniform constellation. For example: In cooperative transmission, data transmission from the source node to the destination node is usually completed in two time slots, wherein in the first time slot, the source node simultaneously transmits data to the intermediate node through the first non-uniform constellation diagram and The destination node; in the second time slot, the intermediate node sends the received data to the destination node through the second non-uniform constellation. At the end of the second time slot, the destination node combines and decodes the signals received in the two time slots.

本实施例的一种实现方式中，第一非均匀星座图和第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得可以为：源节点计算解码符号差错率限的最小值，根据该解码符号差错率限的最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，然后将第二非均匀星座图中的星座点信息发送给中间节点，从而源节点可以获得第一非均匀星座图中的星座点信息，中间节点可以获得第二非均匀星座图中的星座点信息；本实施例的另一种实现方式中，第一非均匀星座图和第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得可以为：源节点计算解码符号差错率限的最小值，并根据解码符号差错率限的最小值计算第一非均匀星座图中的星座点信息；中间节点计算解码符号差错率限的最小值信息，并根据解码符号差错率限的最小值计算第二非均匀星座图中的星座点信息，从而源节点可以获得第一非均匀星座图中的星座点信息，中间节点可以获得第二非均匀星座图中的星座点信息； In an implementation manner of this embodiment, the constellation point information in the first non-uniform constellation and the second non-uniform constellation is obtained by minimizing the decoding symbol error rate limit, and the source node may calculate the decoding symbol error rate limit. a minimum value, the constellation point information in the first non-uniform constellation and the constellation point information in the second non-uniform constellation are calculated according to a minimum value of the decoded symbol error rate limit, and then the constellation points in the second non-uniform constellation are obtained The information is sent to the intermediate node, so that the source node can obtain the constellation point information in the first non-uniform constellation, and the intermediate node can obtain the constellation point information in the second non-uniform constellation. In another implementation manner of this embodiment, a first non-uniform constellation diagram and a second non-uniform constellation diagram The constellation point information may be obtained by minimizing the decoding symbol error rate limit. The source node may calculate the minimum value of the decoding symbol error rate limit, and calculate the constellation point in the first non-uniform constellation according to the minimum value of the decoding symbol error rate limit. Information; the intermediate node calculates minimum information of the decoded symbol error rate limit, and calculates constellation point information in the second non-uniform constellation according to the minimum value of the decoded symbol error rate limit, so that the source node can obtain the first non-uniform constellation The constellation point information, the intermediate node can obtain the constellation point information in the second non-uniform constellation;

在本实施例的再一种实现方式中，第一非均匀星座图和第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得可以为：中间节点计算解码符号差错率限的最小值，根据该解码符号差错率限的最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，并将所述第一非均匀星座图中的星座点信息发送给所述源节点。 In still another implementation manner of this embodiment, the constellation point information in the first non-uniform constellation and the second non-uniform constellation is obtained by minimizing the decoding symbol error rate. The intermediate node may calculate the decoding symbol error rate. a minimum value, calculating constellation point information in the first non-uniform constellation and constellation point information in the second non-uniform constellation according to a minimum value of the decoded symbol error rate limit, and the first non-uniform constellation The constellation point information in is sent to the source node.

上述实施例中，中间节点接收源节点通过第一非均勾星座图发送的数据之后，将上述数据通过第二非均匀星座图发送给目的节点；从而实现了在需要两次传输的场景下，通过非均勾星座图传输数据，降低了解码的误符号率，提高了解码性能。由 BS、 RS和 UT组成的***中，图 2为本发明协作中继网络中的数据传输方法一个应用场景的示意图，如图 2所示，该应用场景是由一个 BS、一个 RS和一个 UT组成的***，本发明实施例以 BS为源节点， RS为中间节点， UT为目的节点为例进行说明。 In the above embodiment, after receiving the data sent by the source node through the first non-uniform constellation diagram, the intermediate node sends the data to the destination node through the second non-uniform constellation. The data is transmitted through the non-uniform constellation diagram, which reduces the symbol error rate of the decoding and improves the decoding performance. In a system consisting of a BS, an RS, and a UT, FIG. 2 is a schematic diagram of an application scenario of a data transmission method in a cooperative relay network according to the present invention. As shown in FIG. 2, the application scenario is performed by a BS, an RS, and a UT. In the embodiment of the present invention, the BS is used as the source node, the RS is the intermediate node, and the UT is the destination node as an example.

图 2示出的是 BS和 RS协作向 UT发送数据的场景，但本发明图 1所示实施例要说明的是，在 UT和 RS协作向 BS发送数据的场景中， UT为源节点， RS为中间节点， BS为目的节点。 2 shows a scenario in which a BS and an RS cooperate to transmit data to a UT, but the embodiment shown in FIG. 1 of the present invention It should be noted that in the scenario where the UT and the RS cooperate to transmit data to the BS, the UT is the source node, the RS is the intermediate node, and the BS is the destination node.

下面以图 2所示场景为例对本发明图 1所示实施例中获得第一非均匀星座图和第二非均匀星座图中的星座点信息的过程进行说明。 The following describes the process of obtaining the constellation point information in the first non-uniform constellation and the second non-uniform constellation in the embodiment shown in FIG. 1 by using the scenario shown in FIG. 2 as an example.

假设 BS和 RS均使用 M阶的正交幅度调制（ Quadrature Amplitude Modulation; 以下简称： M-QAM ) , 每个 M-QAM符号载 N = log₂ M个比特信息。本发明实施例中，假设 BS使用的第一非均匀星座图为： ψ^ ί^^^,-.^ϊ}, 其中^， ^ ^ ，…，^^表示第一非均匀星座图的中一个星座点；假设 RS使用的第二非均匀星座图为： _¥2 =<^²⁾^²⁾ ,...,s⁽ }，其中 s[²⁾, (ie {1,2,...,M 表示第二非均匀星座图的中一个星座点。 It is assumed that both the BS and the RS use M-order Quadrature Amplitude Modulation (hereinafter referred to as M-QAM), and each M-QAM symbol carries N = log ₂ M bits of information. In the embodiment of the present invention, it is assumed that the first non-uniform constellation used by the BS is: ψ^ ί^^^, -.^ϊ}, where ^, ^^, ..., ^^ represents the middle of the first non-uniform constellation A constellation point; assume that the second non-uniform constellation used by the RS is: _¥2 =<^ ²⁾ ^ ²⁾ ,...,s ⁽ }, where s[ ²⁾ , (ie {1,2,.. ., M represents one of the constellation points in the second non-uniform constellation.

对于可分解正交幅度调制（ Quadrature Amplitude Modulation; 以下简称： QAM ) 方式，解码符号差错率限具体可以为：

For the Quadrature Amplitude Modulation (QAM) mode, the decoding symbol error rate limit may be:

其中， 0为解码符号差错率限；和 s ²⁾属于实数域，和 s ²⁾为一个 M阶 < 1 , k≤2

Where 0 is the decoding symbol error rate limit; and s ²⁾ belongs to the real field, and s ²⁾ is an M-order < 1 , k ≤ 2

]_ 16 一 ]_ 16 one

并且， C = U ； γ^{( )}为、丄 B nS与 /— RS之间链路的厶信噪比的厶平均值， γ^{( )}为 RS Also, C = U ; γ ^{( )} is the mean value of the 厶 signal-to-noise ratio of the link between 丄B nS and /_RS, γ ^{( )} is RS

M γ · γ M γ · γ

与 UT之间链路的信噪比的平均值； M为可分解正交幅度调制方式的阶数，即第一非均匀星座图和第二非均匀星座图各自包括的星座点的个数；当 s ^k) > sf〉或 sik^s^时，分割成目标函数为凸函数的有限个互斥凸函数集合，因此本发明实施例中，可应用凸优化方法求解0的最小值。当0 取值最小，且 k = l时，为第一非均匀星座图中第 i个星座点的同向分量或正交分量；当0取值最小，且 k = 2时， _Sl ⁽²⁾为第二非均匀星座图中第 i个星座点的同向分量或正交分量。 The average of the signal-to-noise ratio of the link with the UT; M is the order of the decomposable quadrature amplitude modulation mode, that is, the number of constellation points respectively included in the first non-uniform constellation and the second non-uniform constellation; When s ^k) >sf> or sik^s^, it is divided into a finite set of mutually exclusive convex functions whose objective function is a convex function. Therefore, in the embodiment of the present invention, the convex optimization method can be applied to solve the minimum value of 0. When 0 is the smallest value and k = l, it is the same or orthogonal component of the i-th constellation point in the first non-uniform constellation; when 0 is the smallest, and k = 2, _Sl ⁽²⁾ Is the co-directional component or quadrature component of the i-th constellation point in the second non-uniform constellation.

具体地，可以由 BS计算的最小值，并根据该 D 々最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，然后将第二非均匀星座图中的星座点信息发送给 RS, 从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息；或者，可以由 BS计算的最小值，并根据该0的最小值计算第一非均勾星座图中的星座点信息；由 RS计算的最小值，并根据该0的最小值计算第二非均匀星座图中的星座点信息，从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息；或者，可以由 RS计算的最小值，并根据该 D 々最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，然后将第一非均匀星座图中的星座点信息发送给 BS, 从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息。 Specifically, a minimum value that can be calculated by the BS, and calculating constellation point information in the first non-uniform constellation and constellation point information in the second non-uniform constellation according to the D 々 minimum, and then using the second non-uniform constellation The constellation point information in the figure is sent to the RS, so that the BS can obtain the constellation point information in the first non-uniform constellation, and the RS can obtain the constellation point information in the second non-uniform constellation; or the minimum value that can be calculated by the BS And calculating, according to the minimum value of the zero, the constellation point information in the first non-uniform constellation diagram; the minimum value calculated by the RS, and calculating the constellation point information in the second non-uniform constellation according to the minimum value of the zero, thereby The BS may obtain constellation point information in the first non-uniform constellation, and the RS may obtain constellation point information in the second non-uniform constellation; or the minimum value that can be calculated by the RS, and calculate the first according to the minimum value of the D 々 Constellation point information in the non-uniform constellation and constellation point information in the second non-uniform constellation, and then transmitting the constellation point information in the first non-uniform constellation to the BS, BS can obtain information of the first non-uniform constellation points in the constellation, RS can be obtained a second non-uniform constellation points in the constellation information.

然后， BS可以通过第一非均匀星座图向 RS和 UT发送数据， RS可以通过第二非均匀星座图将 BS发送的数据发送给 UT。这样在第 k个时隙， UT接收到的信号可描述为 r(^k) = a(^k)S(^k) + z(^k) , 其中 k = l或 2, 当 k = l时， S⁽¹)表示来自 BS的信号，当 k = 2时， S⁽²⁾表示来自 RS的信号； z^(k)表示高斯白噪声； a^(k)表示信道增益参数。 UT在解码时利用接收的来自 BS和 RS的两路独立信号进行合并解码，获得分集增益。在可分解 M-QAM方式中，星座点是由两个正交的 ¾Ϊ -ΡΑΜ符号的实部通过卡笛尔坐标乘积得到，这说明星座图的实部和虚部是相互独立并能独立解调的，其中 ΡΑΜ为脉冲幅度调制（ Pulse Amplitude Modulation )的简称。对于可分解 M-QAM方式， UT釆用的最大似然（ Maximum Likelihood; 以下简称： ML ) 解码器可描述为： Then, the BS can transmit data to the RS and the UT through the first non-uniform constellation, and the RS can transmit the data sent by the BS to the UT through the second non-uniform constellation. Thus in the kth time slot, the signal received by the UT can be described as r( ^k ) = a( ^k )S( ^k ) + z( ^k ), where k = l or 2, when k = l, S ^{( 1} ) represents the signal from the BS, when k = 2, S ⁽²⁾ represents the signal from the RS; z ^(k) represents the Gaussian white noise; a ^(k) represents the channel gain parameter. The UT uses the received two independent signals from the BS and RS to perform the combined solution during decoding. Code, get the diversity gain. In the decomposable M-QAM method, the constellation point is obtained by the Cartesian coordinate product of the two orthogonal 3⁄4Ϊ-ΡΑΜ symbols, which means that the real and imaginary parts of the constellation are independent and independent. Tuned, where ΡΑΜ is the abbreviation of Pulse Amplitude Modulation. For the decomposable M-QAM mode, the Maximum Likelihood (hereinafter referred to as ML) decoder used by the UT can be described as:

其中 R (r^(k) )表示 r^(k)的实部， ^k)是发送信号 S^(k)中第 i个符号的同向分量； I(r^(k))表示 r^(k)的虚部， s 是发送信号 S^(k)中第 j个符号的正交分量； Γ表示对同向分量进行解码得到的第 i个星座点， j*表示对正交分量进行解码得到的第 j 个星座点。此时 ML解码器需要计算 2 次以解调 log₂ M个比特信息，即平均解调每个比特信息的复杂度为 ²^ Where R (r ^(k) ) represents the real part of r ^(k) , ^k) is the isotropic component of the ith symbol in the transmitted signal S ^(k) ; I(r ^(k) ) represents the virtual of r ^(k) s is the orthogonal component of the jth symbol in the transmitted signal S ^(k) ; Γ represents the i-th constellation point obtained by decoding the same component, and j* represents the jth obtained by decoding the orthogonal component Constellation point. At this time, the ML decoder needs to calculate 2 times to demodulate log ₂ M bits of information, that is, the average demodulation of each bit of information has a complexity of ² ^

log₂M 图 3为本发明实施例 16QAM调制在第一非均匀星座图中的星座点及其对应的调制符号，其中，图 3中的圓形标识表示本发明实施例中可分解 16QAM 调制在第一非均匀星座图中的星座点位置及其所对应的调制符号，从图 3示出的可分解 16QAM调制在第一非均匀星座图中的星座点位置可以看出，第一非均匀星座图中相邻星座点之间的距离不完全相等，即第一非均匀星座图中的星座点是非均匀分布的；图 4为本发明实施例 16QAM调制在第二非均匀星座图中的星座点及其对应的调制符号，其中，图 4中的圓形标识表示本发明实施例中可分解 16QAM方式在第二非均勾星座图中的星座点位置及其所对应的调制符号，从图 4示出的可分解 16QAM调制在第二非均匀星座图中的星座点位置可以看出，第二非均匀星座图中相邻星座点之间的距离不完全相等，即第二非均匀星座图中的星座点是非均匀分布的。表 1给出了本发明实施例中对于可分解 16QAM方式而言， BS釆用的第一非均匀星座图中的星座点位置（对应于 k = 1 )和 RS釆用的第二非均匀星座图中的星座点位置（对应于 k = 2 )。在实际应用中该顺序也可以颠倒，即 k = 2对应第一非均匀星座图的星座点位置，而 k = 1对应第二非均匀星座图的星座点位置。表 1中的 d₁₆ =0.3162是一个将每个星座点对应的符号的平均能量进行归一化的参数。本发明实施例中，星座点位置和编码比特序列的映射关系可理解为表 1 中第一非均匀星座图中某一位置的星座点和第二非均勾星座图中对应位置的星座点映射为相同的编码比特序歹 |J , 例如：表 1中 k = 1对应的第一非均匀星座图中第 3个星座点及其对应的调制符号（{-3.05 + 0.84j}xd₁₆ )和 k = 2对应的第二非均匀星座图中第 3个星座点及其对应的调制符号（ {-0.84 - 3.05j}xd₁₆ )映射为相同的编码比特序列。表 2给出了本发明实施例中对于可分解 64QAM方式而言， BS釆用的第一非均匀星座图中的星座点位置（对应于 k = 1 )和 RS釆用的第二非均匀星座图中的星座点位置（对应于 k = 2 )。在实际应用中该顺序也可以颠倒，即 k = 2对应第一非均匀星座图的星座点位置，而 k = 1对应第二非均匀星座图的星座点位置。表 2中的 d₆₄=0.1543是一个将每个星座点对应的符号的平均能量进行归一化的参数。星座点位置和编码比特序列的映射关系可理解为表 2中第一非均勾星座图中某一位置的星座点和第二非均勾星座图中对应位置的星座点映射为相同的编码比特序列，例如：表 2中 k = 1对应的第一非均匀星座图中第 3 个星座点及其对应的调制符号（ {-7.20- 2.63 j}xd₆₄ )和 k = 2对应的第二非均匀星座图中第 3个星座点及其对应的调制符号（ {-2.97 - 7.0j}xd₆₄ )映射为相同的编码比特序列。 Log ₂ M FIG. 3 is a constellation point of the 16QAM modulation in the first non-uniform constellation diagram and its corresponding modulation symbol according to Embodiment 16 of the present invention, wherein the circular identifier in FIG. 3 indicates that the decomposable 16QAM modulation is in the embodiment of the present invention. The position of the constellation point in the first non-uniform constellation and its corresponding modulation symbol can be seen from the constellation point position of the decomposable 16QAM modulation shown in FIG. 3 in the first non-uniform constellation, the first non-uniform constellation The distance between adjacent constellation points in the figure is not completely equal, that is, the constellation points in the first non-uniform constellation are non-uniformly distributed; FIG. 4 is a constellation point of the 16QAM modulation in the second non-uniform constellation in the embodiment of the present invention; And corresponding modulation symbols, wherein the circular identifier in FIG. 4 indicates the position of the constellation point in the second non-homogeneous constellation diagram and the corresponding modulation in the decomposable 16QAM mode in the embodiment of the present invention Symbol, from the position of the constellation point in the second non-uniform constellation shown by the decomposable 16QAM modulation shown in FIG. 4, the distance between adjacent constellation points in the second non-uniform constellation is not completely equal, that is, the second The constellation points in the non-uniform constellation are non-uniformly distributed. Table 1 shows the constellation point position (corresponding to k = 1) and the second non-uniform constellation used in the first non-uniform constellation of the BS for the decomposable 16QAM mode in the embodiment of the present invention. The constellation point position in the figure (corresponding to k = 2). In practical applications, the order may also be reversed, that is, k = 2 corresponds to the constellation point position of the first non-uniform constellation, and k = 1 corresponds to the constellation point position of the second non-uniform constellation. d ₁₆ = 0.3162 in Table 1 is a parameter that normalizes the average energy of the symbols corresponding to each constellation point. In the embodiment of the present invention, the mapping relationship between the constellation point position and the coded bit sequence can be understood as a constellation point mapping of a constellation point at a certain position in the first non-uniform constellation diagram and a corresponding position in the second non-uniform constellation constellation in Table 1. For the same coding bit sequence 歹|J , for example: the third constellation point in the first non-uniform constellation corresponding to k = 1 in Table 1 and its corresponding modulation symbol ({-3.05 + 0.84j}xd ₁₆ ) and The third constellation point and its corresponding modulation symbol ({-0.84 - 3.05j}xd ₁₆ ) in the second non-uniform constellation corresponding to k = 2 are mapped to the same coded bit sequence. Table 2 shows the constellation point positions (corresponding to k = 1) and the second non-uniform constellation used in the first non-uniform constellation of the BS for the decomposable 64QAM method in the embodiment of the present invention. The constellation point position in the figure (corresponding to k = 2). In practical applications, the order may also be reversed, that is, k = 2 corresponds to the constellation point position of the first non-uniform constellation, and k = 1 corresponds to the constellation point position of the second non-uniform constellation. d ₆₄ = 0.1543 in Table 2 is a parameter that normalizes the average energy of the symbols corresponding to each constellation point. The mapping relationship between the constellation point position and the coded bit sequence can be understood as the constellation point of a certain position in the first non-uniform constellation diagram in Table 2 and the constellation point of the corresponding position in the second non-homologous constellation diagram are mapped to the same coded bit. a sequence, for example: the third constellation point in the first non-uniform constellation corresponding to k = 1 in Table 2 and its corresponding modulation symbol ( {-7.20- 2.63 j}xd ₆₄ ) and the second non-corresponding to k = 2 All The third constellation point and its corresponding modulation symbol ({-2.97 - 7.0j}xd ₆₄ ) in the uniform constellation map are mapped to the same coded bit sequence.

k = 1 {一3.05 - 3.05j, - 3.05 - 0.84j，— 3.05 + 0.84 j,— 3.05 + 3.05j, k = 1 {a 3.05 - 3.05j, - 3.05 - 0.84j, - 3.05 + 0.84 j, - 3.05 + 3.05j,

-0.84— 3.05j，一 0.84 - 0.84 j, -0.84 + 0.84 j, -0.84 + 3.05j, 0.84— 3.05j,0.84 - 0.84j,0.84 + 0.84j,0.84 + 3.05j, -0.84 - 3.05j, a 0.84 - 0.84 j, -0.84 + 0.84 j, -0.84 + 3.05j, 0.84 - 3.05j, 0.84 - 0.84j, 0.84 + 0.84j, 0.84 + 3.05j,

3.05— 3.05j,3.05— 0.84 j,3.05 + 0.84 j,3.05 + 3.05j}xd₁₆ k = 2 {-0.84 - 0.84 j, -0.84 + 3.05j，一 0.84— 3.05j，一 0.84 + 0.84 j, 3.05—3.05j, 3.05—0.84 j, 3.05 + 0.84 j, 3.05 + 3.05j}xd ₁₆ k = 2 {-0.84 - 0.84 j, -0.84 + 3.05j, a 0.84—3.05j, a 0.84 + 0.84 j,

3.05 - 0.84j,3.05 + 3.05j,3.05 - 3.05j,3.05 + 0.84 j, 3.05 - 0.84j, 3.05 + 3.05j, 3.05 - 3.05j, 3.05 + 0.84 j,

-3.05 - 0.84j，一 3.05 + 3.05j，一 3.05— 3.05j，一 3.05 + 0.84j, 0.84— 0.84j,0.84 + 3.05j,0.84 -3.05j,0.84 + 0.84j}xd₁₆ 表 2 -3.05 - 0.84j, a 3.05 + 3.05j, a 3.05 - 3.05j, a 3.05 + 0.84j, 0.84 - 0.84j, 0.84 + 3.05j, 0.84 - 3.05j, 0.84 + 0.84j} xd ₁₆ Table 2

{-7.20 - 7.20j,-7.20 - 4.57j，- 7.20 - 2.63j,-7.20 - 1.29j, k = 1 {-7.20 - 7.20j,-7.20 - 4.57j,- 7.20 - 2.63j,-7.20 - 1.29j, k = 1

-7.20 + 0.55j,-7.20 + 2.96 j, -7.20 + 4.74j,-7.20 + 7.43 j, -4.57 - 7.20j，- 4.57 - 4.57 j,- 4.57 - 2.63j，一 4.57 - 1.29j, -4.57 + 0.55j，- 4.57 + 2.96j，- 4.57 + 4.74j，- 4.57 + 7.43 j, -2.63 - 7.20j,-2.63 - 4.57j，一 2.63 - 2.63j,-2.63 - 1.29j, -2.63 + 0.55j，- 2.63 + 2.96 j, -2.63 + 4.74j -2.63 + 7.43 j, — 1.29— 7.20j，一 1.29— 4.57 j,— 1.29— 2.63 j,— 1.29— 1.29j, -1.29 + 0.55j，一 1.29 + 2.96 j,— 1.29 + 4.74 j,— 1.29 + 7.43 j, 0.55 - 7.20j,0.55 - 4.57j,0.55 - 2.63j,0.55 - 1.29j, -7.20 + 0.55j,-7.20 + 2.96 j, -7.20 + 4.74j,-7.20 + 7.43 j, -4.57 - 7.20j,- 4.57 - 4.57 j,- 4.57 - 2.63j, a 4.57 - 1.29j, -4.57 + 0.55j,- 4.57 + 2.96j,- 4.57 + 4.74j,- 4.57 + 7.43 j, -2.63 - 7.20j,-2.63 - 4.57j, a 2.63 - 2.63j, -2.63 - 1.29j, -2.63 + 0.55 j,- 2.63 + 2.96 j, -2.63 + 4.74j -2.63 + 7.43 j, — 1.29 — 7.20j, 1.29—4.57 j, — 1.29 — 2.63 j, — 1.29 — 1.29j, —1.29 + 0.55j, one 1.29 + 2.96 j, — 1.29 + 4.74 j, — 1.29 + 7.43 j, 0.55 - 7.20j, 0.55 - 4.57j, 0.55 - 2.63j, 0.55 - 1.29j,

0.55 + 0.55j,0.55 + 2.96j,0.55 + 4.74j,0.55 + 7.43j, 0.55 + 0.55j, 0.55 + 2.96j, 0.55 + 4.74j, 0.55 + 7.43j,

2.96 - 7.20j,2.96 - 4.57 j,2.96 - 2.63j,2.96 - 1.29j, 2.96 - 7.20j, 2.96 - 4.57 j, 2.96 - 2.63j, 2.96 - 1.29j,

2.96 + 0.55j,2.96 + 2.96j,2.96 + 4.74j,2.96 + 7.43j, 2.96 + 0.55j, 2.96 + 2.96j, 2.96 + 4.74j, 2.96 + 7.43j,

4.74 - 7.20j,4.74 - 4.57 j,4.74 - 2.63j,4.74 - 1.29j, 4.74 - 7.20j, 4.74 - 4.57 j, 4.74 - 2.63j, 4.74 - 1.29j,

4.74 + 0.55j,4.74 + 2.96j,4.74 + 4.74j,4.74 + 7.43j, 4.74 + 0.55j, 4.74 + 2.96j, 4.74 + 4.74j, 4.74 + 7.43j,

7.43― 7.20j,7.43― 4.57j,7.43― 2.63j,7.43― 1.29j, 7.43― 7.20j, 7.43― 4.57j, 7.43― 2.63j, 7.43― 1.29j,

7.43 + 0.55j,7.43 + 2.96j,7.43 + 4.74j,7.43 + 7.43j}xd₆₄ {-2.97 - 2.97 j，— 2.97 + 2.54 j, -2.97 -7.00j,-2.97 + 7.61j 7.43 + 0.55j, 7.43 + 2.96j, 7.43 + 4.74j, 7.43 + 7.43j}xd ₆₄ {-2.97 - 2.97 j, — 2.97 + 2.54 j, -2.97 -7.00j, -2.97 + 7.61j

-2.97 - 1.08j,-2.97 + 4.64 j, -2.97 - 4.71j,-2.97 + 0.97 j, 2.54 - 2.97j,2.54 + 2.54j,2.54 -7.00j,2.54 + 7.61j, -2.97 - 1.08j, -2.97 + 4.64 j, -2.97 - 4.71j, -2.97 + 0.97 j, 2.54 - 2.97j, 2.54 + 2.54j, 2.54 -7.00j, 2.54 + 7.61j,

2.54— 1.08j,2.54 + 4.64j,2.54 -4.71j,2.54 + 0.97 j, 2.54—1.08j, 2.54 + 4.64j, 2.54 -4.71j, 2.54 + 0.97 j,

-7.00 -2.97 j, -7.00 + 2.54j，- 7.00— 7.00j，— 7.00 + 7.61j, -7.00 -1.08j, -7.00 + 4.64 j, -7.00 - 4.71j,-7.00 + 0.97 j, 7.61-2.97j,7.61 + 2.54j,7.61-7.00j,7.61 + 7.61j, -7.00 -2.97 j, -7.00 + 2.54j,- 7.00— 7.00j, — 7.00 + 7.61j, -7.00 -1.08j, -7.00 + 4.64 j, -7.00 - 4.71j,-7.00 + 0.97 j, 7.61- 2.97j, 7.61 + 2.54j, 7.61-7.00j, 7.61 + 7.61j,

7.61-1.08j,7.61 + 4.64j,7.61-4.71j,7.61 + 0.97j, 7.61-1.08j, 7.61 + 4.64j, 7.61-4.71j, 7.61 + 0.97j,

—1.08— 2.97 j,— 1.08 + 2.54j，一 1.08— 7.00 j,— 1.08 + 7.61j, -1.08 - 1.08j, -1.08 + 4.64j,-l .08 -4.7 lj,-l .08 + 0.97 j, 4.64 - 2.97 j,4.64 + 2.54j,4.64 -7.00j,4.64 + 7.61j, —1.08— 2.97 j,— 1.08 + 2.54j, a 1.08 — 7.00 j, — 1.08 + 7.61j, -1.08 - 1.08j, -1.08 + 4.64j,-l .08 -4.7 lj,-l .08 + 0.97 j, 4.64 - 2.97 j, 4.64 + 2.54j, 4.64 -7.00j, 4.64 + 7.61j,

4.64— 1.08j,4.64 + 4.64j,4.64 -4.71j,4.64 + 0.97 j, 4.64—1.08j, 4.64 + 4.64j, 4.64 -4.71j, 4.64 + 0.97 j,

-4.71-2.97j,-4.71 + 2.54j,-4.71-7.00j,-4.71 + 7.61j, -4.71 -1.08j,-4.71 + 4.64j,-4.71-4.71j,-4.71 + 0.97 j, 0.97 - 2.97j,0.97 + 2.54j,0.97 -7.00j,0.97 + 7.61j, -4.71-2.97j, -4.71 + 2.54j, -4.71-7.00j, -4.71 + 7.61j, -4.71 -1.08j, -4.71 + 4.64j, -4.71-4.71j, -4.71 + 0.97 j, 0.97 - 2.97j, 0.97 + 2.54j, 0.97 -7.00j, 0.97 + 7.61j,

0.97— 1.08j,0.97 + 4.64j,0.97 -4.71j,0.97 + 0.97j}xd₆₄ 对于有两次传输的 ^ Y分解 QAM方式，解码符号差错率限具体可以为：

0.97—1.08j, 0.97 + 4.64j, 0.97 -4.71j, 0.97 + 0.97j}xd ₆₄ For the ^Y decomposition QAM method with two transmissions, the decoding symbol error rate limit can be:

其中， D₂ 为解码符号差错率限； x;^k)、

^ 和^ 属于实数域， s「) =x「) + jyi"和 s;²) =x;²) + jy;²)为一个 M 阶正交幅度调制符号 Where D ₂ is the decoding symbol error rate limit; x; ^k) ,

^ and ^ belong to the real field, s") = x ") + jyi" and s; ² ) = x; ² ) + jy; ² ) is an M-order quadrature amplitude modulation symbol

<1, 这表示每个符号的发送功率 BS与 RS之间链路的信噪比的平均

<1, which represents the average of the signal-to-noise ratio of the link between the transmission power BS and the RS of each symbol.

"(2) "(2)

值， γ 为 RS与 UT之间链路的信噪比的平均值； Μ为非分解正交幅度调制方式的阶数，即第一非均匀星座图和第二非均匀星座图各自包括的星座点的个数。由于 D₂不是凸函数或凹函数，因此 D₂的最小值不能应用凸优化方法计算。本发明实施例通过启发式的求解方法计算 D₂的最小值，具体地，可以将0的最小值作为计算 D₂的最小值时的初始值，然后以接近该初始值的本地最小值作为 D₂的最小值。当 D₂取值最小时，且 k = l时，为第一非均匀星座图中的第 i个星座点。当 D₂取值最小时，且 k = 2时， si²⁾为第二非均匀星座图中的第 i个星座点。 Value, γ is the average value of the signal-to-noise ratio of the link between RS and UT; Μ is the order of the non-decomposed quadrature amplitude modulation mode, that is, the constellation respectively included in the first non-uniform constellation and the second non-uniform constellation The number of points. Since D ₂ is not a convex function or a concave function, the minimum value of D ₂ cannot be calculated using the convex optimization method. The embodiment of the present invention calculates the minimum value of D ₂ by the heuristic solution method. Specifically, the minimum value of 0 can be used as the initial value when calculating the minimum value of D ₂ , and then the local minimum value close to the initial value is taken as D. The minimum value of ₂ . When D ₂ takes the smallest value, and k = l, it is the i-th constellation point in the first non-uniform constellation. When D ₂ takes the smallest value, and k = 2, si ²⁾ is the i-th constellation point in the second non-uniform constellation.

具体地，可以由 BS计算 D₂的最小值，并根据该 D₂的最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，然后将第二非均匀星座图中的星座点信息发送给 RS, 从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息；或者，可以由 BS计算 D₂的最小值，并根据该 D₂的最小值计算第一非均匀星座图中的星座点信息；由 RS计算 D₂的最小值，并根据该 D₂的最小值计算第二非均匀星座图中的星座点信息，从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息；或者，可以由 RS计算 D₂的最小值，并根据该 D₂的最小值计算第一非均匀星座图中的星座点信息和第二非均匀星座图中的星座点信息，然后将第一非均匀星座图中的星座点信息发送给 BS, 从而 BS可以获得第一非均匀星座图中的星座点信息， RS可以获得第二非均匀星座图中的星座点信息。 Specifically, a minimum value of D ₂ may be calculated by the BS, and constellation point information in the first non-uniform constellation and constellation point information in the second non-uniform constellation are calculated according to the minimum value of the D ₂ , and then the second The constellation point information in the non-uniform constellation is sent to the RS, so that the BS can obtain the constellation point information in the first non-uniform constellation, and the RS can obtain the constellation point information in the second non-uniform constellation; or, can be calculated by the BS D ₂ is the minimum value, and constellation points in accordance with the calculated minimum value D ₂ of the first non-uniform constellation map information; D ₂ calculated by the minimum value of the RS, and based on the calculated minimum value D ₂ of the second non-uniform constellation The constellation point information in the figure, so that the BS can obtain the constellation point information in the first non-uniform constellation, and the RS can obtain the constellation point information in the second non-uniform constellation; or, the minimum value of D ₂ can be calculated by the RS, And calculating constellation point information in the first non-uniform constellation and constellation point information in the second non-uniform constellation according to the minimum value of the D ₂ , and then transmitting the constellation point information in the first non-uniform constellation to the BS, Thus BS Information to obtain a first constellation point in the constellation of non-uniformly, RS can be obtained a second non-uniform constellation points in the constellation information.

然后， BS可以通过第一非均匀星座图向 RS和 UT发送数据， RS可以通过第二非均匀星座图将 BS发送的数据发送给 UT。这样在第 k个时隙， UT接收到的信号可描述为 r(^k) = a(^k)S(^k) + z(^k) , 其中 k = l或 2, 当 k = l时， S⁽¹)表示来自 BS的信号，当 k = 2时， S⁽²⁾表示来自 RS的信号； z^(k)表示高斯白噪声； a^(k)表示信道增益参数。 UT在解码时利用接收的来自 BS和 RS的两路独立信号进行合并解码，获得分集增益。对于非分解 QAM方式，星座点的同向分量和正交分量不一定是两个 PAM 符号的卡笛尔乘积，因此对星座点同向分量和正交分量需进行联合解调。对于非分解 QAM方式， UT釆用的 ML解码器可描述为： Then, the BS can transmit data to the RS and the UT through the first non-uniform constellation, and the RS can transmit the data sent by the BS to the UT through the second non-uniform constellation. Thus in the kth time slot, the signal received by the UT can be described as r( ^k ) = a( ^k )S( ^k ) + z( ^k ), where k = l or 2, when k = l, S ^{( 1} ) represents the signal from the BS, when k = 2, S ⁽²⁾ represents the signal from the RS; z ^(k) represents the Gaussian white noise; a ^(k) represents the channel Gain parameter. The UT performs combined decoding using the received two independent signals from the BS and the RS at the time of decoding to obtain a diversity gain. For the non-decomposed QAM mode, the co-directional component and the orthogonal component of the constellation point are not necessarily the Cartesian product of the two PAM symbols, so the co-directional component and the orthogonal component of the constellation point need to be jointly demodulated. For non-decomposed QAM mode, the UT decoder used by UT can be described as:

2 2

mm r⁽¹⁾ - a⁽¾^1} + ■(2) _ _n(2) (2) ( 4 ) Mm r ⁽¹⁾ - a ⁽ 3⁄4 ^1} + ■(2) _ _n (2) (2) ( 4 )

i=l,.-,M 其中 r⁽¹⁾和 r⁽²⁾分别表示 UT从 BS和 RS收到的信号； oc⁽¹⁾表示 BS与 UT 之间的信道增益参数， oc⁽²⁾表示 RS与 UT之间的信道增益参数；和 s ²⁾分别表示 BS和 RS发送的第 i个符号。此时 ML解码器需要计算 M次以解调 log₂ M 个比特信息，即平均解调每个比特信息的复杂度为^^。 i = l, .-, M where r ⁽¹⁾ and r ⁽²⁾ represent the signals received by the UT from the BS and the RS, respectively; oc ⁽¹⁾ represents the channel gain parameter between the BS and the UT, oc ⁽²⁾ represents The channel gain parameter between RS and UT; and s ²⁾ represent the ith symbol transmitted by the BS and the RS ^, respectively. At this time, the ML decoder needs to calculate M times to demodulate log ₂ M bit information, that is, the complexity of demodulating each bit information on average is ^^.

log₂M 对于非分解 QAM方式，对于同向分量和正交分量进行联合解调，因此对于非分解 QAM方式，星座图的设计也是将两个分量联合起来设计。图 3中的三角形标识表示本发明实施例中非分解 16QAM调制在第一非均匀星座图中的星座点位置及其所对应的调制符号，从图 3示出的非分解 16QAM调制在第一非均匀星座图中的星座点位置也可以看出，第一非均匀星座图中相邻星座点之间的距离不完全相等，即第一非均匀星座图中的星座点是非均匀分布的；图 4中的三角形标识表示本发明实施例非分解 16QAM调制在第二非均匀星座图中的星座点位置及其所对应的调制符号，从图 4示出的非分解 16QAM调制在第二非均匀星座图中的星座点位置可以看出，第二非均匀星座图中相邻星座点之间的距离不完全相等，即第二非均匀星座图中的星座点是非均匀分布的。表 3给出了本发明实施例中对于非分解 16QAM方式而言， BS釆用的第一非均匀星座图中的星座点位置（对应于1^ = 1 )和 RS釆用的第二非均匀星座图中的星座点位置 (对应于 k = 2 ) 。在实际应用中该顺序也可以颠倒，即 k = 2对应第一非均匀星座图的星座点位置，而 k = 1对应第二非均匀星座图的星座点位置。表 3中的 d₁₆=0.3162是一个将每个星座点对应的符号的平均能量进行归一化的参数。星座点位置和编码比特序列的映射关系可理解为表 3中第一非均匀星座图中某一位置的星座点和第二非均勾星座图中对应位置的星座点映射为相同的编码比特序列，例如：表 3中 k = 1对应的第一非均匀星座图中第 3个星座点及其对应的调制符号（{- 1.23 + 1.77j}xd₁₆ )和 k = 2对应的第二非均匀星座图中第 3个星座点及其对应的调制符号（ {-2.47 - 3.02j}xd₁₆ ) 映射为相同的编码比特序列。表 4给出了本发明实施例中对于非分解 64QAM方式而言， BS釆用的第一非均匀星座图中的星座点信息（对应于1^ = 1 )和 RS釆用的第二非均匀星座图中的星座点信息（对应于 k = 2 ) 。在实际应用中该顺序也可以颠倒，即 k = 2对应第一非均匀星座图的星座点位置，而 k = 1对应第二非均匀星座图的星座点位置。表 4中的 d₆₄=0.1543是一个将每个星座点对应的符号的平均能量进行归一化的参数。星座点位置和编码比特序列的映射关系可理解为表 4中第一非均匀星座图中某一位置的星座点和第二非均勾星座图中对应位置的星座点映射为相同的编码比特序列，例如：表 4中 k = 1对应的第一非均匀星座图中第 3个星座点及其对应的调制符号（ {-5.83 - 1.51j}xd₁₆ )和1^ = 2对应的第二非均匀星座图中第 3个星座点及其对应的调制符号（ {-3.64 - 6.41j}xd₁₆ ) 映射为相同的编码比特序列。 Log ₂ M For the non-decomposed QAM mode, joint demodulation is performed for the same direction component and the quadrature component. Therefore, for the non-decomposition QAM mode, the constellation design is also designed by combining two components. The triangular identifier in FIG. 3 indicates the position of the constellation point of the non-decomposed 16QAM modulation in the first non-uniform constellation diagram and the corresponding modulation symbol in the embodiment of the present invention, and the non-decomposed 16QAM modulation shown in FIG. 3 is in the first non- The position of the constellation points in the uniform constellation diagram can also be seen that the distances between adjacent constellation points in the first non-uniform constellation are not completely equal, that is, the constellation points in the first non-uniform constellation are non-uniformly distributed; The triangular identifier in the embodiment indicates the constellation point position of the non-decomposed 16QAM modulation in the second non-uniform constellation diagram and the corresponding modulation symbol thereof in the embodiment of the present invention, and the non-decomposed 16QAM modulation shown in FIG. 4 is in the second non-uniform constellation diagram. It can be seen that the distances between the constellation points in the second non-uniform constellation are not completely equal, that is, the constellation points in the second non-uniform constellation are non-uniformly distributed. Table 3 shows the first non-uniform constellation used by the BS for the non-decomposed 16QAM mode in the embodiment of the present invention. The position of the constellation point (corresponding to 1^ = 1) and the position of the constellation point in the second non-uniform constellation used by RS (corresponding to k = 2). In practical applications, the order may also be reversed, that is, k = 2 corresponds to the constellation point position of the first non-uniform constellation, and k = 1 corresponds to the constellation point position of the second non-uniform constellation. d ₁₆ = 0.3162 in Table 3 is a parameter that normalizes the average energy of the symbols corresponding to each constellation point. The mapping relationship between the constellation point position and the coded bit sequence can be understood as the constellation point of a certain position in the first non-uniform constellation in Table 3 and the constellation point of the corresponding position in the second non-uniform constellation chart are mapped to the same coded bit sequence. For example, the third constellation point in the first non-uniform constellation corresponding to k = 1 in Table 3 and its corresponding modulation symbol ({- 1.23 + 1.77j}xd ₁₆ ) and the second non-uniform corresponding to k = 2 The third constellation point in the constellation and its corresponding modulation symbol ( {-2.47 - 3.02j}xd ₁₆ ) are mapped to the same coded bit sequence. Table 4 shows the constellation point information (corresponding to 1^ = 1) and the second non-uniformity of the RS used in the first non-uniform constellation of the BS for the non-decomposed 64QAM mode in the embodiment of the present invention. Constellation point information in the constellation diagram (corresponding to k = 2). In practical applications, the order may also be reversed, that is, k = 2 corresponds to the constellation point position of the first non-uniform constellation, and k = 1 corresponds to the constellation point position of the second non-uniform constellation. d ₆₄ = 0.1543 in Table 4 is a parameter that normalizes the average energy of the symbols corresponding to each constellation point. The mapping relationship between the constellation point position and the coded bit sequence can be understood as the constellation point of a certain position in the first non-uniform constellation in Table 4 and the constellation point of the corresponding position in the second non-uniform constellation chart are mapped to the same coded bit sequence. For example: in Table 4, the third constellation point in the first non-uniform constellation corresponding to k = 1 and its corresponding modulation symbol ( {-5.83 - 1.51j}xd ₁₆ ) and the second non-corresponding to 1^ = 2 The third constellation point and its corresponding modulation symbol ( {-3.64 - 6.41j}xd ₁₆ ) in the uniform constellation are mapped to the same coded bit sequence.

表 3

table 3

o o

表 4 Table 4

{-7.44 - 6.55j, -7.08 - 3.50j, -5.83 -1.51j,-8.91 -1.46j, -8.73 + 1.54j,-5.23 + 1.31j, -2.67 + 1.31j,-8.15 + 4.38j, -2.77― 8.43j，- 4.50― 6.10j，一 4.98— 3.89j，— 4.30― 2.16j, -6.82 + 0.17j，一 3.49 + 3.17j，一 5.84 + 3.30j，一 5.79 + 7.35j_: -2.36― 5.97 j, -2.94 - 3.81j，- 0.32― 0.19j，— 0.94 + 2.58j, —3.59― 0.49j,2.50 + 2.89j,0 + 4.33j，- 4.34 + 5.04 j, 0.09― 9.13j,—1.00― 4.48j,l .30― 0.87 j,—1.03 + 0.90j, -2.40― 1.16j,l .07 + 3.20j,—1.74 + 4.07 j, -3.13 + 6.41j, 2.09 - 7.67j，- 0.12― 6.58j，- 1.53― 2.99 j, -0.82― 1.67 j, 1.09 + 1.21j,0.95 + 5.92j,-1.01 + 6.57j,-2.24 + 8.77j, 1.46― 4.90j,2.81― 2.34j,3.92 + 2.28j,3.04 + 0.78j, 5.46 + 0.66j,4.13 + 4.12j,2.75 + 5.59j,0.66 + 8.78j, 0.75 - 2.78j,3.12 - 5.16j,3.59 - 0.61j,4.83 -1.91j, 6.60 - 0.82j,6.05 + 2.62j,5.55 + 4.84j,3.34 + 8.34j, 4.74― 8.37j,7.72― 5.19j,5.03 - 3.67j,4.93 - 5.65j, 8.41 - 2.50j,8.66 + 0.24j,8.64 + 3.02j,6.74 + 6.84j}xd₆₄ {-7.44 - 6.55j, -7.08 - 3.50j, -5.83 -1.51j, -8.91 -1.46j, -8.73 + 1.54j, -5.23 + 1.31j, -2.67 + 1.31j, -8.55 + 4.38j, - 2.77― 8.43j,- 4.50― 6.10j, a 4.98— 3.89j, — 4.30― 2.16j, -6.82 + 0.17j, a 3.49 + 3.17j, a 5.84 + 3.30j, a 5.79 + 7.35j _: -2.36― 5.97 j, -2.94 - 3.81j,- 0.32― 0.19j, — 0.94 + 2.58j, —3.59― 0.49j, 2.50 + 2.89j,0 + 4.33j,- 4.34 + 5.04 j, 0.09― 9.13j, —1.00 ― 4.48j,l .30― 0.87 j,—1.03 + 0.90j, -2.40― 1.16j,l .07 + 3.20j, —1.74 + 4.07 j, -3.13 + 6.41j, 2.09 - 7.67j,- 0.12― 6.58j,- 1.53― 2.99 j, -0.82― 1.67 j, 1.09 + 1.21j,0.95 + 5.92j,-1.01 + 6.57j,-2.24 + 8.77j, 1.46― 4.90j,2.81― 2.34j,3.92 + 2.28 j,3.04 + 0.78j, 5.46 + 0.66j, 4.13 + 4.12j, 2.75 + 5.59j, 0.66 + 8.78j, 0.75 - 2.78j, 3.12 - 5.16j, 3.59 - 0.61j, 4.83 -1.91j, 6.60 - 0.82 j,6.05 + 2.62j,5.55 + 4.84j,3.34 + 8.34j, 4.74― 8.37j,7.72― 5.19j,5.03 - 3.67j,4.93 - 5.65j, 8.41 - 2.50j,8.66 + 0.24j, 8.64 + 3.02 j, 6.74 + 6.84j}xd ₆₄

{-0.85 -1.29j, -4.10 + 1.66 j, -3.64 - 6.41j,0.33 + 5.36j, {-0.85 -1.29j, -4.10 + 1.66 j, -3.64 - 6.41j, 0.33 + 5.36j,

— 3.75— 2.56j，一 3.47 + 5.06 j，一 0.79— 3.67 j，一 0.17 + 2.20j_: — 3.75— 2.56j, a 3.47 + 5.06 j, a 0.79 — 3.67 j, a 0.17 + 2.20j _:

1.55 - 3.50j,2.26 + 2.55j,4.30— 5.60j,3.85 + 7.38j, 1.55 - 3.50j, 2.26 + 2.55j, 4.30-5.60j, 3.85 + 7.38j,

4.61 -1.00j,2.58 + 4.51j,2.05 - 6.32j,l.57 -1.63j, 4.61 -1.00j, 2.58 + 4.51j, 2.05 - 6.32j, l.57 -1.63j,

— 6.02— 3.64j，一 6.71 + 4.65j，一 6.94 - 6.63j，一 6.34 + 7.21j, — 6.02— 3.64j, a 6.71 + 4.65j, a 6.94 - 6.63j, a 6.34 + 7.21j,

-8.86 - 0.43j，— 8.85 + 2.59j,-8.09 -3.35j,-5.82 + 0.25j, -8.86 - 0.43j, - 8.85 + 2.59j, -0.89 -3.35j, -5.82 + 0.25j,

5.34 + 0.77j,7.89 + 3.58j,6.14 - 7.46j,7.23 + 6.67 j, 5.34 + 0.77j, 7.89 + 3.58j, 6.14 - 7.46j, 7.23 + 6.67 j,

8.78 - 2.06j,9.25 + 1.10j,6.96 - 4.63j,6.34 + 2.28j, 8.78 - 2.06j, 9.25 + 1.10j, 6.96 - 4.63j, 6.34 + 2.28j,

-2.59 - 4.08j,-l.59 + 3.97 j, -0.10 -8.67 j,-1.48 + 8.84j, -2.59 - 4.08j,-l.59 + 3.97 j, -0.10 -8.67 j,-1.48 + 8.84j,

-0.23 + 0.30j，一 1.11 + 6.33j,-l .40 - 6.43j，一 2.48 + 2.42j, -0.23 + 0.30j, a 1.11 + 6.33j, -l .40 - 6.43j, a 2.48 + 2.42j,

5.40 -3.23j,4.27 + 2.75j,2.49 - 8.40j,l .84 + 9.05j, 5.40 -3.23j, 4.27 + 2.75j, 2.49 - 8.40j, l .84 + 9.05j,

6.71 - 0.79j,4.86 + 5.19j,3.22 -3.97j,3.52 + 0.55j, 6.71 - 0.79j, 4.86 + 5.19j, 3.22 -3.97j, 3.52 + 0.55j,

-3.80 - 0.62 j, -6.74 + 1.91j,-3.39 -8.50j, -3.75 + 7.00j, -3.80 - 0.62 j, -6.74 + 1.91j, -3.39 -8.50j, -3.75 + 7.00j,

-6.23 -1.64 j, -4.43 + 3.38j, -4.35 - 4.63j, -2.36 -1.34j, -6.23 -1.64 j, -4.43 + 3.38j, -4.35 - 4.63j, -2.36 -1.34j,

1.66 + 0.01j, -2.17 + 0.92 j,0.47 - 5.54 j,l.87 + 6.31j, 1.66 + 0.01j, -2.17 + 0.92 j, 0.47 - 5.54 j,l.87 + 6.31j,

3.26 - 1.85 j, 0.48 + 3.86 j, 0.18 - 2.40 j, 1.34 + 1.63 j} x d₆₄ 3.26 - 1.85 j, 0.48 + 3.86 j, 0.18 - 2.40 j, 1.34 + 1.63 j} xd ₆₄

本发明实施例中， BS釆用的第一非均匀星座图中的星座点信息和 RS釆用的第二非均勾星座图中的星座点信息都是通过计算预先获得并存储在各个节点中，在实际应用时， BS和 RS根据对应的星座图中的星座点信息将数据映射复杂度较低。并且本发明实施例提供的协作中继网络中的数据传输方法降低了解码的误符号率，提高了解码性能。 In the embodiment of the present invention, the constellation point information in the first non-uniform constellation diagram used by the BS and the constellation point information in the second non-homogeneous constellation diagram used in the RS are obtained in advance by calculation and stored in each node. In actual application, the BS and the RS have lower data mapping complexity according to the constellation point information in the corresponding constellation diagram. Moreover, the data transmission method in the cooperative relay network provided by the embodiment of the present invention reduces the symbol error rate of the decoding and improves the decoding performance.

图 5为本发明数据传输方法一个实施例的流程图，如图 5所示，该数据传输方法可以包括： FIG. 5 is a flowchart of an embodiment of a data transmission method according to the present invention. As shown in FIG. 5, the data transmission method may include:

步骤 501 , 通过第三非均勾星座图将数据发送给目的节点。 Step 501: Send data to the destination node by using a third non-uniform constellation.

步骤 502, 接收目的节点在上述数据接收失败时发送的重传指示。步骤 503 , 根据该重传指示通过第四非均匀星座图将上述数据发送给目的节点，第三非均匀星座图和第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，该星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；第三非均匀星座图和第四非均匀星座图中相邻星座点之间的距离不完全相等。 Step 502: Receive a retransmission indication sent by the destination node when the data reception fails. Step 503: Send the foregoing data to the destination node by using the fourth non-uniform constellation according to the retransmission indication, and the constellation point information in the third non-uniform constellation and the fourth non-uniform constellation is pre-determined by minimizing the decoding symbol error rate. Obtaining, the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; and a distance between adjacent constellation points in the third non-uniform constellation diagram and the fourth non-uniform constellation diagram is not completely equal .

具体地，第三非均匀星座图和第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得可以为：源节点计算解码符号差错率限的最小值，然后根据该解码符号差错率限的最小值计算第三非均匀星座图中的星座点信息和第四非均匀星座图中的星座点信息。 Specifically, the constellation point information in the third non-uniform constellation and the fourth non-uniform constellation may be obtained by minimizing the decoded symbol error rate. The source node may calculate a minimum value of the decoded symbol error rate limit, and then according to the decoding. The minimum value of the symbol error rate limit calculates the constellation point information in the third non-uniform constellation and the constellation point information in the fourth non-uniform constellation.

当源节点釆用可分解正交幅度调制方式时，该解码符号差错率限具体可以为：

When the source node uses the decomposable quadrature amplitude modulation mode, the decoding symbol error rate limit may specifically be:

其中， D₃为解码符号差错率限；和 s ²⁾属于实数域，和 s ²⁾为一个 M阶 , 2 ;

Where D ₃ is the decoding symbol error rate limit; and s ²⁾ belongs to the real number field, and s ²⁾ is an M order, 2;

并且， d = l . -了， γ⁽³⁾为源节点与目的节点之间链路的信噪比的平均值； And, d = l . -, γ ⁽³⁾ is the average value of the signal-to-noise ratio of the link between the source node and the destination node;

Μ为可分解正交幅度调制方式的阶数； Μ is the order of the decomposable quadrature amplitude modulation method;

其中，计算 D₃的最小值时所釆用的方法与前述实施例中计算的最小值时所釆用的方法相同，请参考前述实施例中的描述，在此不再赘述。当 D₃取值最小，且 k = l时，为第一非均匀星座图中第 i个星座点的同向分量或正交分量；当 D₃取值最小，且 k = 2时， _Sl ⁽²⁾为第二非均匀星座图中第 i 个星座点的同向分量或正交分量。当源节点釆用可分解正交幅度调制方式时，目的节点接收到源节点发送的数据之后，可以釆用式（2 )所示的 ML解码器进行解码，请参考前述实施例中的描述，在此不再赘述。当源节点釆用非分解正交幅度调制方式时，该解码符号差错率限具体可以 The method for calculating the minimum value of D _{3 is} the same as the method used for the minimum value calculated in the foregoing embodiment. Please refer to the description in the foregoing embodiment, and details are not described herein again. When D _{3 is the} smallest value and k = l, it is the same or orthogonal component of the i-th constellation point in the first non-uniform constellation; when D _{3 is the} smallest, and k = 2, _Sl ^{( 2)} is the same or orthogonal component of the i-th constellation point in the second non-uniform constellation. When the source node uses the decomposable quadrature amplitude modulation mode, after receiving the data sent by the source node, the destination node may perform decoding by using the ML decoder shown in the formula (2). Please refer to the description in the foregoing embodiment. I will not repeat them here. When the source node uses the non-decomposed quadrature amplitude modulation mode, the decoding symbol error rate limit may specifically

其中， D₄为解码符号差错率限； x;^k)、

y;^k)和属于实数域， = x「) + jy;¹) 和 s;²) = x;²) + jy;²) 为一个 M阶正交幅度调制符号 Where D ₄ is the decoding symbol error rate limit; x; ^k) ,

y; ^k) and belong to the real field, = x ") + jy; ¹ ) and s; ² ) = x; ² ) + jy; ² ) is an M-order quadrature amplitude modulation symbol

+ (2) < 1 , 这表示每个符号的发送功率

受限为 1 ; k为正整数， l≤k≤2 ; 并且， c， = ^ γ(³)为源节点与目的 + (2) < 1 , which indicates the transmit power of each symbol

Limited to 1; k is a positive integer, l ≤ k ≤ 2; and, c, = ^ γ( ³ ) is the source node and purpose

Μ /—(3)、² Μ /—(3), ²

(^γ / 节点之间链路的信噪比的平均值； Μ为非分解正交幅度调制方式的阶数；其中，计算 D₄的最小值时所釆用的方法与前述实施例中计算 D₂的最小值时所釆用的方法相同，请参考前述实施例中的描述，在此不再赘述。当 D₄取值最小时，且 k = l时，为第一非均匀星座图中的第 i个星座点；当 D₄取值最小时，且 k = 2时，为第二非均匀星座图中的第 i个星座点。当源节点釆用非分解正交幅度调制方式时，目的节点接收到源节点发送的数据之后，可以釆用式（4 )所示的 ML解码器进行解码，请参考前述实施例中的描述，在此不再赘述。 (average of the signal-to-noise ratio of the link between ^γ / nodes; Μ is the order of the non-decomposed quadrature amplitude modulation method; wherein the method used to calculate the minimum value of D ₄ and the calculation D in the foregoing embodiment The method used in the minimum value of _{2 is} the same, please refer to the description in the foregoing embodiment, and details are not described herein. When D _{4 is the} smallest value, and k = l, it is in the first non-uniform constellation. The i-th constellation point; when the value of D _{4 is the} smallest, and k = 2, it is the i-th constellation point in the second non-uniform constellation. When the source node uses the non-decomposed quadrature amplitude modulation mode, the purpose After receiving the data sent by the source node, the node may perform decoding by using the ML decoder shown in the formula (4). Please refer to the foregoing embodiment. The description is not repeated here.

上述实施例中，源节点可以通过第三非均匀星座图将数据发送给目的节点，接收到目的节点在上述数据接收失败时发送的重传指示之后，根据重传指示通过第四非均匀星座图将上述数据发送给目的节点；从而实现了在需要两次传输的场景下，通过非均勾星座图传输数据，降低了解码的误符号率，提高了解码性能。 In the foregoing embodiment, the source node may send the data to the destination node by using the third non-uniform constellation, and after receiving the retransmission indication sent by the destination node when the data reception fails, pass the fourth non-uniform constellation according to the retransmission indication. The above data is sent to the destination node; thus, in the scenario that requires two transmissions, the data is transmitted through the non-uniform constellation diagram, the decoding error rate is reduced, and the decoding performance is improved.

本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

图 6为本发明中间节点一个实施例的结构示意图，本实施例中的中间节点可以实现本发明图 1所示实施例的流程，如图 6所示，该中间节点可以包括：第一接收模块 61和第一发送模块 62； FIG. 6 is a schematic structural diagram of an embodiment of an intermediate node according to the present invention. The intermediate node in this embodiment may implement the process of the embodiment shown in FIG. 1 of the present invention. As shown in FIG. 6, the intermediate node may include: a first receiving module. 61 and the first sending module 62;

其中，第一接收模块 61 , 用于接收源节点通过第一非均匀星座图发送的数据； The first receiving module 61 is configured to receive data that is sent by the source node by using the first non-uniform constellation.

第一发送模块 62,用于将第一接收模块 61接收的数据通过第二非均勾星座图发送给目的节点，第一非均匀星座图和第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，该星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；第一非均匀星座图和第二非均匀星座图中相邻星座点之间的距离不完全相等。 The first sending module 62 is configured to send the data received by the first receiving module 61 to the destination node by using the second non-uniform constellation, and the constellation point information in the first non-uniform constellation and the second non-uniform constellation pass the minimum The decoded symbol error rate limit is obtained in advance, and the constellation point information includes a mapping relationship between the constellation point position and the coded bit sequence corresponding to each constellation point; the first non-uniform constellation and the adjacent constellation point in the second non-uniform constellation The distance between them is not exactly equal.

上述中间节点，第一接收模块 61接收源节点通过第一非均匀星座图发送的数据之后，第一发送模块 62将上述数据通过第二非均勾星座图发送给目的节点；从而实现了在需要两次传输的场景下，通过非均匀星座图传输数据，降低了解码的误符号率，提高了解码性能。 After the first receiving module 61 receives the data sent by the source node through the first non-uniform constellation, the first sending module 62 sends the data to the destination node through the second non-uniform constellation. Therefore, in the scenario that requires two transmissions, the data is transmitted through the non-uniform constellation, the decoding error rate is reduced, and the decoding performance is improved.

图 7为本发明中间节点另一个实施例的结构示意图，与图 6所示的中间节点相比，不同之处在于，在本实施例的一种实现方式中，图 7所示的中间节点还可以包括： FIG. 7 is a schematic structural diagram of another embodiment of an intermediate node according to the present invention. Compared with the intermediate node shown in FIG. 6, the difference is that, in an implementation manner of this embodiment, the intermediate node shown in FIG. Can include:

第二接收模块 63 ,用于接收源节点发送的第二非均勾星座图中的星座点信息； The second receiving module 63 is configured to receive the constellation point information in the second non-uniform constellation sent by the source node;

在本实施例的另一种实现方式中，图 7所示的中间节点还可以包括：第一计算模块 64 , 用于计算解码符号差错率限的最小值，并根据解码符号差错率限的最小值计算第二非均匀星座图中的星座点信息。 In another implementation manner of this embodiment, the intermediate node shown in FIG. 7 may further include: a first calculating module 64, configured to calculate a minimum value of the decoded symbol error rate limit, and according to a minimum of the decoding symbol error rate limit The value calculates constellation point information in the second non-uniform constellation.

在本实施例的再一种实现方式中，图 7所示的中间节点还可以包括：第二计算模块 65和第二发送模块 66； In a further implementation of this embodiment, the intermediate node shown in FIG. 7 may further include: a second calculating module 65 and a second sending module 66;

其中，第二计算模块 65 , 用于计算解码符号差错率限的最小值，根据该解码符号差错率限的最小值计算第一非均勾星座图中的星座点信息和第二非均匀星座图中的星座点信息； The second calculating module 65 is configured to calculate a minimum value of the decoding symbol error rate limit, and calculate constellation point information and a second non-uniform constellation in the first non-uniform constellation constellation according to the minimum value of the decoding symbol error rate limit. Constellation point information in ;

第二发送模块 66 ,用于将第二计算模块 65计算的第一非均勾星座图中的星座点信息发送给源节点。 The second sending module 66 is configured to send the pedestal point information in the first non-equal chorus constellation calculated by the second calculating module 65 to the source node.

上述中间节点实现了在需要两次传输的场景下，通过非均匀星座图传输数据，降低了解码的误符号率，提高了解码性能。 The foregoing intermediate node realizes transmission of data through a non-uniform constellation in a scenario requiring two transmissions, which reduces the symbol error rate of decoding and improves decoding performance.

图 8为本发明协作中继***一个实施例的结构示意图，如图 8所示，该协作中继***可以包括：中间节点 81、源节点 82和目的节点 83 ; FIG. 8 is a schematic structural diagram of an embodiment of a cooperative relay system according to the present invention. As shown in FIG. 8, the cooperative relay system may include: an intermediate node 81, a source node 82, and a destination node 83;

其中，源节点 82 , 用于通过第一非均匀星座图将数据发送给中间节点 81 , 并通过第一非均匀星座图将上述数据发送给目的节点 83； The source node 82 is configured to send data to the intermediate node 81 by using the first non-uniform constellation. And transmitting the above data to the destination node 83 through the first non-uniform constellation;

中间节点 81 , 用于接收源节点 82通过第一非均匀星座图发送的数据，并将该数据通过第二非均匀星座图发送给目的节点 83 ,第一非均匀星座图和第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，该星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；第一非均匀星座图和第二非均匀星座图中相邻星座点之间的距离不完全相等； The intermediate node 81 is configured to receive data sent by the source node 82 through the first non-uniform constellation, and send the data to the destination node 83 through the second non-uniform constellation, the first non-uniform constellation and the second non-uniform constellation The constellation point information in the figure is obtained in advance by minimizing a decoding symbol error rate limit, and the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; a first non-uniform constellation diagram and a second non- The distance between adjacent constellation points in the uniform constellation is not completely equal;

目的节点 83 , 用于接收源节点 82和中间节点 81发送的数据。 The destination node 83 is configured to receive data sent by the source node 82 and the intermediate node 81.

举例来说，在协作传输中，从源节点 82到目的节点 83的数据传输通常在两个时隙完成，其中在第一个时隙，源节点 82通过第一非均匀星座图将数据同时发送给中间节点 81和目的节点 83; 在第二个时隙，中间节点 81将接收到的数据通过第二非均匀星座图发送给目的节点 83。在第二时隙末尾，目的节点 83将在上述两个时隙收到的信号进行合并解码。 For example, in cooperative transmission, data transmission from source node 82 to destination node 83 is typically done in two time slots, where in the first time slot, source node 82 simultaneously transmits data through the first non-uniform constellation. The intermediate node 81 and the destination node 83 are provided; in the second time slot, the intermediate node 81 transmits the received data to the destination node 83 through the second non-uniform constellation. At the end of the second time slot, the destination node 83 combines and decodes the signals received in the above two time slots.

本实施例中，第一非均匀星座图和第二非均匀星座图中的星座点信息的获得方法与本发明方法实施例中提供的方法相同，在此不再赘述。 In this embodiment, the method for obtaining the constellation point information in the first non-uniform constellation and the second non-uniform constellation is the same as the method provided in the method embodiment of the present invention, and details are not described herein again.

上述协作中继***，实现了在需要两次传输的场景下，通过非均匀星座图传输数据，降低了解码的误符号率，提高了解码性能。 The cooperative relay system achieves transmission of data through a non-uniform constellation in a scenario requiring two transmissions, which reduces the symbol error rate of decoding and improves decoding performance.

图 9为本发明源节点一个实施例的结构示意图，本实施例中的源节点可以实现本发明图 5所示实施例的流程，如图 9所示，该源节点可以包括：第三发送模块 91、第三接收模块 92和第四发送模块 93; FIG. 9 is a schematic structural diagram of an embodiment of a source node according to the present invention. The source node in this embodiment may implement the process of the embodiment shown in FIG. 5 of the present invention. As shown in FIG. 9, the source node may include: a third sending module. 91, a third receiving module 92 and a fourth sending module 93;

其中，第三发送模块 91 , 用于通过第三非均匀星座图将数据发送给目的节点； The third sending module 91 is configured to send data to the destination node by using the third non-uniform constellation;

第三接收模块 92 , 用于接收目的节点在数据接收失败时发送的重传指示；第四发送模块 93 ,用于根据第三接收模块 92接收的重传指示通过第四非均匀星座图将上述数据发送给目的节点，第三非均匀星座图和第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，上述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；第三非均勾星座图和第四非均匀星座图中相邻星座点之间的距离不完全相等。在本实施例的一种实现方式中，该源节点还可以进一步包括：第三计算模块 94, 用于计算解码符号差错率限的最小值，根据该解码符号差错率限的最小值计算第三非均匀星座图中的星座点信息和第四非均匀星座图中的星座点信息。上述实施例中，第三发送模块 91可以通过第三非均勾星座图将数据发送给目的节点，第三接收模块 92接收到目的节点在上述数据接收失败时发送的重传指示之后，第四发送模块 93根据该重传指示通过第四非均匀星座图将上述数据发送给目的节点；从而实现了在需要两次传输的场景下，通过非均匀星座图传输数据，降低了解码的误符号率，提高了解码性能。本领域技术人员可以理解附图只是一个优选实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述进行分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。 The third receiving module 92 is configured to receive a retransmission indication sent by the destination node when the data reception fails; The fourth sending module 93 is configured to send the foregoing data to the destination node, the third non-uniform constellation, and the constellation in the fourth non-uniform constellation according to the retransmission indication received by the third receiving module 92 by using the fourth non-uniform constellation The point information is obtained in advance by minimizing a decoding symbol error rate limit, wherein the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; a third non-uniform constellation constellation and a fourth non-uniform constellation The distance between adjacent constellation points is not exactly equal. In an implementation manner of this embodiment, the source node may further include: a third calculating module 94, configured to calculate a minimum value of the decoded symbol error rate limit, and calculate a third value according to the minimum value of the decoded symbol error rate limit Constellation point information in the non-uniform constellation and constellation point information in the fourth non-uniform constellation. In the foregoing embodiment, the third sending module 91 may send data to the destination node by using the third non-uniform constellation diagram, and the third receiving module 92 receives the retransmission indication sent by the destination node when the data receiving failure fails, and fourth. The sending module 93 sends the foregoing data to the destination node by using the fourth non-uniform constellation according to the retransmission indication; thereby, the data is transmitted through the non-uniform constellation in the scenario that requires two transmissions, and the decoded symbol error rate is reduced. , improved decoding performance. A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention. Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or the corresponding changes may be located in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: Modifying the technical solutions described in the foregoing embodiments, or The technical features of the present invention are not limited to the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

权利要求 Rights request

1、一种协作中继网络中的数据传输方法，其特征在于，包括： A data transmission method in a cooperative relay network, characterized in that it comprises:

中间节点接收源节点通过第一非均匀星座图发送的数据； The intermediate node receives data sent by the source node through the first non-uniform constellation;

2、根据权利要求 1所述的方法，其特征在于，还包括： 2. The method according to claim 1, further comprising:

所述源节点将所述数据通过所述第一非均勾星座图发送给所述目的节点。 The source node sends the data to the destination node through the first non-uniform constellation.

3、根据权利要求 2所述的方法，其特征在于，所述第一非均匀星座图和所述第二非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得包括： The method according to claim 2, wherein the constellation point information in the first non-uniform constellation and the second non-uniform constellation is obtained in advance by minimizing a decoding symbol error rate limit, including:

所述源节点计算所述解码符号差错率限的最小值，根据所述解码符号差错率限的最小值计算所述第一非均勾星座图中的星座点信息和所述第二非均匀星座图中的星座点信息，并将所述第二非均匀星座图中的星座点信息发送给所述中间节点；或者， The source node calculates a minimum value of the decoding symbol error rate limit, and calculates constellation point information and the second non-uniform constellation in the first non-uniform constellation constellation according to a minimum value of the decoding symbol error rate limit Constellation point information in the figure, and transmitting constellation point information in the second non-uniform constellation diagram to the intermediate node; or

所述源节点计算所述解码符号差错率限的最小值，并根据所述解码符号差错率限的最小值计算所述第一非均勾星座图中的星座点信息；所述中间节点计算所述解码符号差错率限的最小值，并根据所述解码符号差错率限的最小值计算所述第二非均匀星座图中的星座点信息；或者，所述中间节点计算所述解码符号差错率限的最小值，根据所述解码符号差错率限的最小值计算所述第一非均勾星座图中的星座点信息和所述第二非均匀星座图中的星座点信息，并将所述第一非均匀星座图中的星座点信息发送给所述源节点。 The source node calculates a minimum value of the decoded symbol error rate limit, and calculates constellation point information in the first non-uniform hook constellation according to a minimum value of the decoded symbol error rate limit; Decoding a minimum value of a symbol error rate limit, and calculating constellation point information in the second non-uniform constellation according to a minimum value of the decoded symbol error rate limit; or The intermediate node calculates a minimum value of the decoding symbol error rate limit, and calculates constellation point information and the second non-uniform constellation in the first non-uniform constellation constellation according to a minimum value of the decoding symbol error rate limit Constellation point information in the figure, and transmitting constellation point information in the first non-uniform constellation to the source node.

4、根据权利要求 3所述的方法，其特征在于，所述源节点和所述中间节点釆用可分解正交幅度调制方式或者非分解正交幅度调制方式。 4. The method according to claim 3, wherein the source node and the intermediate node use a decomposable quadrature amplitude modulation method or a non-decomposition quadrature amplitude modulation method.

5、根据权利要求 4所述的方法，其特征在于，所述源节点和所述中间节点釆用可分解正交幅度调制方式时，所述解码符号差错率限具体为：

The method according to claim 4, wherein when the source node and the intermediate node use the decomposable quadrature amplitude modulation mode, the decoding symbol error rate limit is specifically:

其中，为所述解码符号差错率限；和 ²⁾属于实数域，和 ²⁾为一个 < 1 , 所述

Wherein, the decoding symbol error rate limit; and ²⁾ belong to the real number field, and ²⁾ is a <1,

源节点与所述中间节点之间链路的信噪比的平均值， γ⁽²⁾为所述中间节点与所述目的节点之间链路的信噪比的平均值； Μ为所述可分解正交幅度调制方式的阶数； The average value of the signal to noise ratio of the link between the source node and the intermediate node, γ ⁽²⁾ is the average value of the signal to noise ratio of the link between the intermediate node and the destination node; Decompose the order of the quadrature amplitude modulation method;

当0取值最小，且 k = l时，为所述第一非均匀星座图中第 i个星座点的同向分量或正交分量；当0取值最小，且 k = 2时， _Sl ⁽²⁾为所述第二非均匀星座图中第 i个星座点的同向分量或正交分量。 When the value of 0 is the smallest, and k = l, it is the same or orthogonal component of the i-th constellation point in the first non-uniform constellation; when the value of 0 is the smallest, and k = 2, _Sl ^{( 2)} is an isotropic component or a quadrature component of the i-th constellation point in the second non-uniform constellation.

6、根据权利要求 4所述的方法，其特征在于，所述源节点和所述中间节点釆用非分解正交幅度调制方式时，所述解码符号差错率限具体为：

The method according to claim 4, wherein, when the source node and the intermediate node use a non-decomposed orthogonal amplitude modulation mode, the decoding symbol error rate limit is specifically:

其中， D₂为所述解码符号差错率限； x;^k)、

y;^k)和属于实数域，且 = x「) + jy;¹) 和 s;²) =x;²) + jy;²) 为一个 M阶正交幅度调制符号， Where D ₂ is the decoding symbol error rate limit; x; ^k) ,

y; ^k) and belong to the real field, and = x ") + jy; ¹ ) and s; ² ) = x; ² ) + jy; ² ) is an M-order quadrature amplitude modulation symbol,

+ (2) <1; k为正整数， l<k<2; 并且,

+ (2) <1; k is a positive integer, l<k<2;

16 -(1) 16 - (1)

C=— -__m __m , 为所述源节点与所述中间节点之间链路的信噪比的平均C=—−_ _m _ _m , the average of the signal-to-noise ratio of the link between the source node and the intermediate node

Μ γ⁽¹⁾.γ⁽²⁾ 值， γ⁽²⁾为所述中间节点与所述目的节点之间链路的信噪比的平均值； Μ为所述非分解正交幅度调制方式的阶数；当 D₂取值最小时，且 k=l时，为所述第一非均匀星座图中的第 i个星座点；当 D₂取值最小时，且 k = 2时，为所述第二非均匀星座图中的第 i个星座点。 γ γ ⁽¹⁾ . γ ⁽²⁾ value, γ ⁽²⁾ is an average value of a signal-to-noise ratio of a link between the intermediate node and the destination node; Μ is the non-decomposed quadrature amplitude modulation method Order; when D ₂ takes the smallest value, and k=l, is the i-th constellation point in the first non-uniform constellation; when D ₂ takes the smallest value, and k = 2, The i-th constellation point in the second non-uniform constellation.

7、一种数据传输方法，其特征在于，包括：源节点通过第三非均匀星座图将数据发送给目的节点；所述源节点接收所述目的节点在所述数据接收失败时发送的重传指示；所述源节点根据所述重传指示通过第四非均勾星座图将所述数据发送给所述目的节点，所述第三非均匀星座图和所述第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第三非均勾星座图和所述第四非均匀星座图中相邻星座点之间的距离不完全相等。 A data transmission method, comprising: transmitting, by a source node, data to a destination node by using a third non-uniform constellation; and receiving, by the source node, retransmission sent by the destination node when the data reception fails Instructing, by the source node, the data to be sent to the destination node by using a fourth non-uniform constellation map according to the retransmission indication, in the third non-uniform constellation diagram and the fourth non-uniform constellation diagram The constellation point information is obtained in advance by minimizing a decoding symbol error rate limit, and the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; the third non-equal constellation constellation and the The distances between adjacent constellation points in the fourth non-uniform constellation are not exactly equal.

8、根据权利要求 7所述的方法，其特征在于，所述第三非均匀星座图和所述第四非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得包括： The method according to claim 7, wherein the constellation point information in the third non-uniform constellation and the fourth non-homogeneous constellation is obtained in advance by minimizing a decoding symbol error rate Includes:

所述源节点计算所述解码符号差错率限的最小值，根据所述解码符号差错率限的最小值计算所述第三非均勾星座图中的星座点信息和所述第四非均匀星座图中的星座点信息。 The source node calculates a minimum value of the decoding symbol error rate limit, and calculates constellation point information and the fourth non-uniform constellation in the third non-uniform constellation constellation according to a minimum value of the decoding symbol error rate limit The constellation point information in the figure.

9、根据权利要求 8所述的方法，其特征在于，所述源节点釆用可分解正交幅度调制方式时，所述解码符号差错率限具体为：

The method according to claim 8, wherein when the source node uses the decomposable quadrature amplitude modulation mode, the decoding symbol error rate limit is specifically:

其中， D₃为所述解码符号差错率限；和 ²⁾属于实数域，和 ²⁾为一个 < 1 , 述源

Wherein D ₃ is the decoding symbol error rate limit; and ²⁾ belongs to the real number field, and ²⁾ is a < 1 , the source

节点与所述目的节点之间链路的信噪比的平均值； M为所述可分解正交幅度调制方式的阶数； The average value of the signal to noise ratio of the link between the node and the destination node; M is the order of the decomposable quadrature amplitude modulation mode;

当 D₃取值最小，且 k = l时，为所述第三非均匀星座图中第 i个星座点的同向分量或正交分量；当 D₃取值最小，且 k = 2时， si²⁾为所述第四非均匀星座图中第 i个星座点的同向分量或正交分量。 When D _{3 is the} smallest value and k = l, it is the same or orthogonal component of the i-th constellation point in the third non-uniform constellation; when D _{3 is the} smallest, and k = 2, Si ²⁾ is an isotropic component or a quadrature component of the i-th constellation point in the fourth non-uniform constellation.

10、根据权利要求 8所述的方法，其特征在于，所述源节点釆用非分解正交幅度调制方式时，所述解码符号差错率限具体为：

其中， D₄为所述解码符号差错率限； x;^k)、

y;^k)和属于实数域，且 s「) = x「) + jyi" 和 s;²) = x;²) + jy;²) 为一个 M阶正交幅度调制符号， The method according to claim 8, wherein when the source node uses the non-decomposed orthogonal amplitude modulation mode, the decoding symbol error rate limit is specifically:

Where D ₄ is the decoding symbol error rate limit; x; ^k)

y; ^k) and belong to the real field, and s ") = x ") + jyi" and s; ² ) = x; ² ) + jy; ² ) is an M-order quadrature amplitude modulation symbol,

(1) + (1) < ,(2) (1) + (1) < , (2)

1，丄 ( + (2) < 1 ; k为正整数， l < k < 2 ; 并且， 1, 丄 ( + (2) < 1 ; k is a positive integer, l < k < 2 ;

C_{1 =}丄 · γ⁽³⁾为所述源节点与所述目的节点之间链路的信噪比的平均值； Μ为所述非分解正交幅度调制方式的阶数； C _{1 =}丄· γ ⁽³⁾ is an average value of a signal-to-noise ratio of a link between the source node and the destination node; Μ is an order of the non-decomposed quadrature amplitude modulation method;

当 D₄取值最小时，且 k = l时，为所述第四非均匀星座图中的第 i个星座点；当 D₄取值最小时，且 k = 2时，为所述第四非均匀星座图中的第 i个星座点 When D ₄ takes the smallest value, and k = l, is the i-th constellation point in the fourth non-uniform constellation; when D ₄ takes the smallest value, and k = 2, the fourth The i-th constellation point in the non-uniform constellation

11、一种中间节点，其特征在于，包括： 11. An intermediate node, comprising:

第一接收模块，用于接收源节点通过第一非均匀星座图发送的数据；第一发送模块，用于将所述第一接收模块接收的数据通过第二非均勾星座图发送给目的节点，所述第一非均匀星座图和所述第二非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第一非均勾星座图和所述第二非均匀星座图中相邻星座点之间的距离不完全相等。 a first receiving module, configured to receive data that is sent by the source node by using the first non-uniform constellation; and the first sending module is configured to send the data received by the first receiving module to the destination node by using the second non-uniform constellation And constellation point information in the first non-uniform constellation and the second non-uniform constellation are obtained in advance by minimizing a decoding symbol error rate, where the constellation point information includes a constellation point position and a corresponding corresponding to each constellation point a mapping relationship of coded bit sequences; the distance between adjacent constellation points in the first non-uniform constellation and the second non-uniform constellation is not completely equal.

12、根据权利要求 11所述的中间节点，其特征在于，还包括： The intermediate node according to claim 11, further comprising:

第二接收模块，用于接收所述源节点发送的第二非均勾星座图中的星座点信息；或者， a second receiving module, configured to receive constellation point information in the second non-uniform constellation sent by the source node; or

第一计算模块，用于计算所述解码符号差错率限的最小值，并根据所述解码符号差错率限的最小值计算所述第二非均勾星座图中的星座点信息。 a first calculating module, configured to calculate a minimum value of the decoding symbol error rate limit, and calculate constellation point information in the second non-homogeneous constellation graph according to a minimum value of the decoding symbol error rate limit.

13、根据权利要求 11所述的中间节点，其特征在于，还包括：第二计算模块，用于计算所述解码符号差错率限的最小值，根据所述解码符号差错率限的最小值计算所述第一非均勾星座图中的星座点信息和所述第二非均匀星座图中的星座点信息； The intermediate node according to claim 11, further comprising: a second calculating module, configured to calculate a minimum value of the decoding symbol error rate limit, and calculate constellation point information and the second in the first non-uniform constellation constellation according to a minimum value of the decoding symbol error rate limit Constellation point information in a non-uniform constellation;

第二发送模块，用于将所述第二计算模块计算的第一非均勾星座图中的星座点信息发送给所述源节点。 And a second sending module, configured to send, to the source node, the stagnation point information in the first non-uniform constellation constellation calculated by the second computing module.

14、一种协作中继***，其特征在于，包括：中间节点、源节点和目的节点； 14. A cooperative relay system, comprising: an intermediate node, a source node, and a destination node;

所述中间节点，用于接收所述源节点通过所述第一非均勾星座图发送的数据，并将所述数据通过第二非均勾星座图发送给所述目的节点，所述第一非均匀星座图和所述第二非均勾星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第一非均匀星座图和所述第二非均匀星座图中相邻星座点之间的距离不完全相等； The intermediate node is configured to receive data sent by the source node by using the first non-uniform hook constellation, and send the data to the destination node by using a second non-uniform constellation map, where the first The constellation point information in the non-uniform constellation diagram and the second non-uniform constellation constellation is obtained in advance by minimizing a decoding symbol error rate limit, where the constellation point information includes a constellation point position and a coded bit sequence corresponding to each constellation point a mapping relationship; the distance between adjacent constellation points in the first non-uniform constellation and the second non-uniform constellation is not completely equal;

15、根据权利要求 14所述的***，其特征在于，所述源节点和所述中间节点釆用可分解正交幅度调制方式或者非分解正交幅度调制方式。 The system according to claim 14, wherein the source node and the intermediate node are in a decomposable quadrature amplitude modulation mode or a non-decomposition quadrature amplitude modulation mode.

16、一种源节点，其特征在于，包括： 16. A source node, comprising:

第三发送模块，用于通过第三非均勾星座图将数据发送给目的节点；第三接收模块，用于接收所述目的节点在所述数据接收失败时发送的重传指示；第四发送模块，用于根据所述第三接收模块接收的重传指示通过第四非均匀星座图将所述数据发送给所述目的节点，所述第三非均勾星座图和所述第四非均匀星座图中的星座点信息通过最小化解码符号差错率限预先获得，所述星座点信息包括星座点位置和每个星座点所对应的编码比特序列的映射关系；所述第三非均匀星座图和所述第四非均匀星座图中相邻星座点之间的距离不完全相等。 a third sending module, configured to send data to the destination node by using a third non-uniform constellation diagram; and a third receiving module, configured to receive a retransmission indication sent by the destination node when the data reception fails; a fourth sending module, configured to send the data to the destination node by using a fourth non-uniform constellation according to a retransmission indication received by the third receiving module, where the third non-equal constellation map and the first The constellation point information in the four non-uniform constellation map is obtained in advance by minimizing a decoding symbol error rate limit, where the constellation point information includes a mapping relationship between a constellation point position and a coding bit sequence corresponding to each constellation point; the third non- The distance between adjacent constellation points in the uniform constellation and the fourth non-uniform constellation is not completely equal.

17、根据权利要求 16所述的源节点，其特征在于，还包括： The source node according to claim 16, further comprising:

第三计算模块，用于计算所述解码符号差错率限的最小值，根据所述解码符号差错率限的最小值计算所述第三非均勾星座图中的星座点信息和所述第四非均匀星座图中的星座点信息。 a third calculating module, configured to calculate a minimum value of the decoding symbol error rate limit, and calculate constellation point information and the fourth in the third non-uniform constellation constellation according to a minimum value of the decoding symbol error rate limit Constellation point information in a non-uniform constellation.