WO2018137479A1 - 一种数字波束成形码本生成方法及设备 - Google Patents

一种数字波束成形码本生成方法及设备 Download PDF

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WO2018137479A1
WO2018137479A1 PCT/CN2018/070763 CN2018070763W WO2018137479A1 WO 2018137479 A1 WO2018137479 A1 WO 2018137479A1 CN 2018070763 W CN2018070763 W CN 2018070763W WO 2018137479 A1 WO2018137479 A1 WO 2018137479A1
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digital
codebook
beamforming
information
generating
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PCT/CN2018/070763
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English (en)
French (fr)
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徐国珍
左君
王爱玲
韩双锋
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***通信有限公司研究院
***通信集团有限公司
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Publication of WO2018137479A1 publication Critical patent/WO2018137479A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a digital beamforming codebook generating method and apparatus.
  • hybrid beamforming Hybrid Beamforming
  • PMI Precoding Matrix Indicator
  • a pre-generated fixed digital codebook is used to cover the entire angular space (or phase space), and the UE selects the most suitable codeword for current beamforming by comparing the codewords in the codebook ( Or PMI feedback), the program has the characteristics of low complexity.
  • analog beamforming greatly limits the range of beam coverage due to hybrid beamforming techniques; in addition, due to the high direct-current characteristics of high-frequency communications ( LOS channel), if a uniform fixed digital codebook is used, the number of digital beams covered for a narrow analog beam is extremely small, which will greatly limit the accuracy of digital beamforming and reduce the digital beamforming gain.
  • the Rice channel state is more obvious. Since the system adopts hybrid beamforming, the generated beam state can be represented as shown in Figures 1, 2 and 3. 1 shows analog beamforming, and FIGS. 2 and 3 show digital beamforming, wherein the range in which the digital beam 3 is shaped in FIGS. 2 and 3 is limited to analog beamforming.
  • the analog beam (such as the wider beam 1 in Figure 1) covers a sufficient number of digital beams, but uses the same digital beam if it is in a narrower digital beam ( Figure 1).
  • the narrower beam 2 the number of digital beams under the analog beam is extremely small, which greatly limits the gain of digital beamforming.
  • the technical problem to be solved by the present disclosure is to provide a digital beamforming codebook generating method and apparatus.
  • the codebook of the digital beam within the analog beam can be dynamically generated to increase the digital beamforming gain.
  • an embodiment of the present disclosure provides the following solution:
  • a digital beamforming codebook generating method includes:
  • a shaped codebook of the digital beam is generated based on the information of the analog beamforming.
  • the generating the codebook of the digital beam further includes:
  • a digital beamforming codeword that matches the current channel is selected.
  • the method further includes:
  • the selected current channel matched digital beamforming codeword is fed back to the base station.
  • the steps of obtaining the currently used analog beamforming information include:
  • the information of the analog beamforming includes: width information of the analog beam, information about the rotation direction of the analog beam, and the number of digital ports.
  • the step of generating a shaped codebook of the digital beam according to the information of the analog beamforming includes:
  • a shaped codebook of the digital beam is generated based on the rank number.
  • the step of generating a shaped codebook of the digital beam according to the rank number includes:
  • a shaped codebook of the digital beam is generated based on the signal strength of the phase space dimension.
  • the step of generating a shaped codebook of the digital beam according to the signal strength of the phase space dimension includes:
  • a codeword that is more than the second preset value is allocated to generate a shaped codebook of the digital beam.
  • the step of selecting a digital beamforming codeword that matches the current channel from the shaped codebook of the digital beam includes:
  • An embodiment of the present disclosure further provides a digital beamforming codebook generating apparatus, including:
  • An acquisition module configured to obtain information about the currently used analog beamforming
  • a generating module configured to generate a shaped codebook of the digital beam according to the information of the analog beamforming.
  • the digital beamforming codebook generating device further includes:
  • a selection module configured to select, from the shaped codebook of the digital beam, a digital beamforming codeword that matches the current channel.
  • the digital beamforming codebook generating device further includes:
  • a feedback module configured to feed back the selected digital beamforming codeword of the current channel to the base station.
  • the acquiring module is specifically configured to: obtain information about the simulated beamforming used by the current sounding reference signal SRS configuration.
  • the information of the analog beamforming includes: width information of the analog beam, information about the rotation direction of the analog beam, and the number of digital ports.
  • the generating module is specifically configured to: rank the information of the analog beamforming to obtain a rank number; and generate a shaped codebook of the digital beam according to the rank number.
  • the generating module is specifically configured to: determine a phase space dimension of the beam according to the rank number; acquire a signal strength of the phase space dimension; generate a number according to the signal strength of the phase space dimension The shaped codebook of the beam.
  • the generating module is configured to: when generating a codebook of the digital beam according to the signal strength of the phase space dimension, specifically:
  • a codeword that is more than the second preset value is allocated to generate a shaped codebook of the digital beam.
  • the selection module is specifically configured to:
  • An embodiment of the present disclosure further provides a digital beamforming codebook generating apparatus, including a processor and a memory, wherein the processor, by calling and executing a program or data stored in the memory, is used to acquire a currently used The beamformed information is simulated, and a shaped codebook of the digital beam is generated based on the information of the analog beamforming.
  • Embodiments of the present disclosure also provide a computer readable storage medium having stored thereon instructions for implementing the steps of any of the above methods.
  • the above solution of the present disclosure obtains the information of the currently used analog beamforming; and generates a shaped codebook of the digital beam according to the information of the analog beamforming.
  • the codebook of the digital beam within the analog beam can be dynamically generated to increase the digital beamforming gain.
  • Figure 1 is a schematic diagram of analog beamforming
  • 2 is a schematic diagram of the limitation of the range of digital beamforming in an analog beam
  • Figure 3 is a schematic diagram showing the limitation of the range of digital beamforming in an analog beam
  • FIG. 4 is a communication flow chart of a terminal initial access to a data communication phase
  • FIG. 5 is a flowchart of a method for generating a digital beamforming codebook of the present disclosure
  • FIG. 6 is a diagram showing an execution process of a digital beamforming codebook generating apparatus of the present disclosure
  • FIG. 7 is a block diagram of a module of a digital beamforming codebook generating apparatus of the present disclosure.
  • the overall process of the terminal initially accessing to the data communication phase includes: Step 1, analog beam acquisition; Step 2, semi-dynamic SRS (probe reference signal) configuration and SRS transmission; Step 3 , CSI-RS transmission and CSI feedback; step 4, data transmission.
  • step 2 after determining the analog beam currently used by the terminal or the base station, in the system of the analog beam and the digital beam hybrid beamforming, the base station and/or the terminal are based on the information of the currently used analog beam. Dynamic generation of the digital beamforming codebook corresponding to the current channel can make the digital codebook reasonably represent the phase space in the analog beam, not to waste part of the digital code, and select the optimal codeword for digital beamforming.
  • a first embodiment of the present disclosure provides a digital beamforming codebook generating method, including:
  • Step 51 Obtain information about the currently used analog beamforming
  • Step 52 Generate a shaped codebook of the digital beam according to the information of the analog beamforming.
  • the embodiment of the present disclosure dynamically generates a digital beamforming codebook corresponding to the current channel based on the information of the currently used analog beam, so that the digital codebook can reasonably represent the phase space in the analog beam without wasting part of the digital code, and The optimal codeword is selected for digital beamforming.
  • a second embodiment of the present disclosure provides a digital beamforming codebook generating method, including:
  • Step 51 Obtain information about the currently used analog beamforming
  • Step 52 Generate a shaped codebook of the digital beam according to the information of the analog beamforming.
  • Step 53 Select, from the shaped codebook of the digital beam, a digital beamforming codeword that matches the current channel;
  • the digital beamforming codebook corresponding to the current channel is dynamically generated based on the information of the currently used analog beam, so that the digital codebook can reasonably represent the phase space in the analog beam, and the optimal codeword is selected therefrom.
  • Digital beamforming is dynamically generated based on the information of the currently used analog beam, so that the digital codebook can reasonably represent the phase space in the analog beam, and the optimal codeword is selected therefrom.
  • a third embodiment of the present disclosure provides a digital beamforming codebook generating method, including:
  • Step 51 Obtain information about the currently used analog beamforming
  • Step 52 Generate a shaped codebook of the digital beam according to the information of the analog beamforming.
  • Step 53 Select, from the shaped codebook of the digital beam, a digital beamforming codeword that matches the current channel;
  • Step 54 Feed the selected digital beamforming codeword matched by the current channel to the base station.
  • both the terminal and the base station side can adopt the same algorithm.
  • a digital beamforming codeword matching the current channel is selected; wherein, after the terminal is selected, the selected device can be further selected.
  • the digital beamforming codeword of the current channel matching is fed back to the base station. That is to say, the above steps 51-53 can be performed either on the base station side or on the terminal side.
  • step 51 may include:
  • Step 511 Acquire information about the analog beamforming currently used for the configuration of the sounding reference signal SRS.
  • the information of the analog beamforming includes: width information of the analog beam, information about the rotation direction of the analog beam, and the number of digital ports.
  • step 52 may include:
  • Step 521 Calculate the information of the analog beamforming information to obtain a rank number
  • Step 522 Generate a shaped codebook of the digital beam according to the rank number.
  • step 522 can include:
  • Step 5221 determining a phase space dimension of the beam according to the rank number
  • Step 5222 Obtain a signal strength of the phase space dimension.
  • Step 5223 Generate a shaped codebook of the digital beam according to the signal strength of the phase space dimension. Specifically, the phase space dimension of the phase space dimension is greater than the first preset value, and the allocation is more than the second preset. The codeword of the value, generating a shaped codebook of the digital beam.
  • the digital codebook generating device based on the simulated beamforming information shown in FIG. 6 generates a digital beamforming codebook corresponding to the current analog beam according to the current analog beamforming information, such as the simulated beamwidth and the simulated beam direction. From the codebook, a corresponding digital beamforming codeword is selected.
  • Generating a digital codebook is to allocate the channel space.
  • the channel In the absence of an analog beam, the channel is generally full-rank, and the number of digital ports is equal to the dimension of the phase space; however, after the presence of the analog beam, the channel is largely down-ranked.
  • Step 521 rank (analog beam information (width, direction), number of digital ports), and rank;
  • the user after the hybrid beamforming, dynamically generates the digital beamforming codebook corresponding to the current channel according to the current analog beam information after selecting an analog beam.
  • the digital codebook reasonably characterizes the phase space in the analog beam (not to waste part of the digital code), and selects the optimal codeword for digital beamforming.
  • the digital beamforming gain of the present disclosure is greatly improved compared to the digital beamforming scheme under the conventional fixed codebook
  • the present disclosure can suppress analog inter-beam interference, and the number of terminals that can be simultaneously accessed is greatly improved compared with the conventional digital beamforming scheme under the fixed codebook.
  • the method of the foregoing embodiment of the present disclosure is applied to a traditional wide beam scene such as a low frequency band, and the generated instant digital beamforming codebook can be regarded as a fixed version, thereby being compatible with the traditional 4G system.
  • an embodiment of the present disclosure further provides a digital beamforming codebook generating apparatus 700, including:
  • the obtaining module 701 is configured to obtain information about the currently used analog beamforming
  • the generating module 702 is configured to generate a shaped codebook of the digital beam according to the information of the analog beamforming.
  • the digital beamforming codebook generating device further includes:
  • a selection module configured to select, from the shaped codebook of the digital beam, a digital beamforming codeword that matches the current channel.
  • the digital beamforming codebook generating device further includes:
  • a feedback module configured to feed back the selected digital beamforming codeword of the current channel to the base station.
  • the acquiring module 701 is specifically configured to: acquire information about the simulated beamforming currently used by the sounding reference signal SRS configuration.
  • the information of the analog beamforming includes: width information of the analog beam, information about the rotation direction of the analog beam, and the number of digital ports.
  • the generating module 702 is specifically configured to: rank the information of the simulated beamforming to obtain a rank number; and generate a shaped codebook of the digital beam according to the rank number.
  • the generating module is specifically configured to: determine a phase space dimension of the beam according to the rank number; acquire a signal strength of the phase space dimension; generate a number according to the signal strength of the phase space dimension The shaped codebook of the beam.
  • the generating module is configured to: when generating a codebook of the digital beam according to the signal strength of the phase space dimension, specifically:
  • a codeword that is more than the second preset value is allocated to generate a shaped codebook of the digital beam.
  • the selection module is specifically configured to:
  • the device of the present disclosure may be a device as shown in FIG. 7, or may be a device in a terminal or a base station or a terminal device or a base station device.
  • the device is a device corresponding to all the methods in the foregoing method embodiments, and all implementations in the foregoing method embodiments are applicable to the device embodiment.
  • the device of the present disclosure also performs hybrid beamforming, and the user (or base station) dynamically generates a digital beamforming codebook corresponding to the current channel according to the current analog beam information after selecting an analog beam, and the digital codebook is properly characterized. Simulate the phase space within the beam (not to waste part of the digital code) and select the optimal codeword for digital beamforming.
  • the digital beamforming gain of the present disclosure is greatly improved compared to the digital beamforming scheme under the conventional fixed codebook
  • the present disclosure can suppress analog inter-beam interference, and the number of terminals that can be simultaneously accessed is greatly improved compared with the conventional digital beamforming scheme under the fixed codebook.
  • the device is applied to a traditional wide beam scene such as a low frequency band, and the generated instant digital beamforming codebook can be regarded as a fixed version, thereby being compatible with the traditional 4G system.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other electronic unit for performing the functions of the present application Or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the techniques herein can be implemented by modules (eg, procedures, functions, etc.) that perform the functions herein.
  • the software code can be stored in memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the memory can be either volatile memory or non-volatile memory, or can include both volatile and nonvolatile memory.

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Abstract

本公开的实施例提供一种数字波束成形码本生成方法及设备，其中方法包括：获取当前采用的模拟波束成形的信息；根据所述模拟波束成形的信息，生成数字波束的成形码本。

Description

一种数字波束成形码本生成方法及设备
相关申请的交叉引用
本申请主张于2017年1月26日提交中国专利局、申请号为201710057497.4的优先权，其全部内容据此通过引用并入本申请。
技术领域
本公开涉及通信技术领域，特别是指一种数字波束成形码本生成方法及设备。
背景技术
当前3GPP标准化过程中，考虑到设备成本等因素，将采用混合波束成形(Hybrid Beamforming)方案。为了保证网络覆盖范围大，提升波束成形增益，混合波束成形中的模拟波束的波束宽度通常较窄，从而汇聚发射功率。而相应的数字波束成形，则采用固定码本的方案，用户每次从固定码本中选择相应的码字，作为PMI(Precoding Matrix Indicator，预编码矩阵指示)反馈，从而协助基站端完成数字波束成形。
在相关技术中，采用预先生成的固定的数字码本，覆盖整个角度空间(或相空间)，用户端通过对比码本中的各码字，选择与当前信道最适合的码字进行波束成形(或PMI反馈)，该方案具有复杂度低的特点。然而，对于5G NR***中，尤其是高频段***中，由于采用混合波束成形技术，模拟波束成形会极大的限制波束覆盖的范围；此外，由于高频通信中，存在直射径明显的特征(LOS信道)，若使用统一的固定的数字码本，对于较窄的模拟波束，其涵盖的数字波束，数量极少，这将极大的限制数字波束成形的准确度，降低数字波束成形增益。
在5G通高频信中，莱斯信道状态更为明显，由于***采用混合波束成形，其生成的波束状态可表示如图1、2、3所示。其中图1表示模拟波束成形，图2和图3表示数字波束成形，其中，图2和图3中数字波束3成形的范围被限制在模拟波束成形中。
在模拟波束较宽的情况下，该模拟波束(如图1中的较宽的波束1)涵盖的数字波束数量尚可，但是采用同样的数字波束，如果在较窄的数字波束(如图1中较窄的波束2)，则模拟波束下的数字波束数量极少，极大的限制了数字波束成形的增益。
发明内容
本公开要解决的技术问题是提供了一种数字波束成形码本生成方法及设备。可以动态生成模拟波束内的数字波束的码本，从而提高数字波束成形增益。
为解决上述技术问题，本公开的实施例提供如下方案：
一种数字波束成形码本生成方法，包括：
获取当前采用的模拟波束成形的信息；
根据所述模拟波束成形的信息，生成数字波束的成形码本。
其中，生成数字波束的成形码本后还包括：
从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字。
其中，选择与当前信道匹配的数字波束成形码字后还包括：
将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
其中，获取当前采用的模拟波束成形的信息的步骤包括：
获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
其中，根据所述模拟波束成形的信息，生成数字波束的成形码本的步骤包括：
对所述模拟波束成形的信息求秩，得到秩数；
根据所述秩数，生成数字波束的成形码本。
其中，根据所述秩数，生成数字波束的成形码本的步骤包括：
根据所述秩数，确定波束的相空间维度；
获取所述相空间维度的信号强度；
根据所述相空间维度的信号强度，生成数字波束的成形码本。
其中，根据所述相空间维度的信号强度，生成数字波束的成形码本的步骤包括：
对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成数字波束的成形码本。
其中，从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字的步骤包括：
根据公式：
Figure PCTCN2018070763-appb-000001
从所述数字波束的成形码本V中，选择方向与理想波束成形向量w最接近的码字v；其中，
Figure PCTCN2018070763-appb-000002
表示码本化的波束成形向量。
本公开的实施例还提供一种数字波束成形码本生成设备，包括：
获取模块，用于获取当前采用的模拟波束成形的信息；
生成模块，用于根据所述模拟波束成形的信息，生成数字波束的成形码本。
其中，数字波束成形码本生成设备还包括：
选择模块，用于从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字。
其中，数字波束成形码本生成设备还包括：
反馈模块，用于将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
其中，所述获取模块具体用于：获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
其中，所述生成模块具体用于：对所述模拟波束成形的信息求秩，得到秩数；根据所述秩数，生成数字波束的成形码本。
其中，所述生成模块在得到秩数后具体用于：根据所述秩数，确定波束的相空间维度；获取所述相空间维度的信号强度；根据所述相空间维度的信号强度，生成数字波束的成形码本。
其中，所述生成模块在根据所述相空间维度的信号强度，生成数字波束的 成形码本时，具体用于：
对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成数字波束的成形码本。
其中，所述选择模块具体用于：
根据公式：
Figure PCTCN2018070763-appb-000003
从所述数字波束的成形码本V中，选择方向
与理想波束成形向量w最接近的码字v；其中，
Figure PCTCN2018070763-appb-000004
表示码本化的波束成形向量。
本公开实施例还提供了一种数字波束成形码本生成设备，包括处理器和存储器，其中所述处理器，通过调用并执行所述存储器中所存储的程序或数据，用于获取当前采用的模拟波束成形的信息，并根据所述模拟波束成形的信息，生成数字波束的成形码本。
本公开实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质上存储有实现任一项上述方法中的步骤的指令。
本公开的上述方案至少包括以下有益效果：
本公开的上述方案，通过获取当前采用的模拟波束成形的信息；根据所述模拟波束成形的信息，生成数字波束的成形码本。可以动态生成模拟波束内的数字波束的码本，从而提高数字波束成形增益。
附图说明
图1为模拟波束成形的示意图；
图2为数字波束成形的范围限制在模拟波束中的示意图；
图3为数字波束成形的范围限制在模拟波束中的示意图；
图4为终端初始接入至数据通信阶段的通信流程图；
图5为本公开的数字波束成形码本生成方法的流程图；
图6为本公开的数字波束成形码本生成设备的执行过程图；
图7为本公开的数字波束成形码本生成设备的模块框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
如图4所示，在5G通信中，终端初始接入至数据通信阶段的总体流程，包括：步骤1，模拟波束采集；步骤2，半动态SRS(探测参考信号)配置及SRS传输；步骤3，CSI-RS传输和CSI反馈；步骤4，数据传输。
上述步骤2中，在确定了终端或者基站当前采用的模拟波束后，本公开的实施例在模拟波束和数字波束混合波束成形的***中，基站和/或终端基于当前采用的模拟波束的信息，动态生成当前信道对应的数字波束成形码本，可以使数字码本合理表征模拟波束内的相空间，不至于浪费部分数字码，并从中选取最优码字进行数字波束成形。
如图5所示，本公开的第一实施例提供一种数字波束成形码本生成方法，包括：
步骤51，获取当前采用的模拟波束成形的信息；
步骤52，根据所述模拟波束成形的信息，生成数字波束的成形码本。
本公开的该实施例，基于当前采用的模拟波束的信息，动态生成当前信道对应的数字波束成形码本，可以使数字码本合理表征模拟波束内的相空间，不至于浪费部分数字码，并从中选取最优码字进行数字波束成形。
本公开的第二实施例提供一种数字波束成形码本生成方法，包括：
步骤51，获取当前采用的模拟波束成形的信息；
步骤52，根据所述模拟波束成形的信息，生成数字波束的成形码本；
步骤53，从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字；
其中，可以根据公式：
Figure PCTCN2018070763-appb-000005
从所述数字波束的成形码本V中，选择方向与理想波束成形向量w最接近的码字v；其中，
Figure PCTCN2018070763-appb-000006
表示码本化的波束成形向量。
本公开的该实施例，基于当前采用的模拟波束的信息，动态生成当前信道对应的数字波束成形码本，可以使数字码本合理表征模拟波束内的相空间，并从中选取最优码字进行数字波束成形。
本公开的第三实施例提供一种数字波束成形码本生成方法，包括：
步骤51，获取当前采用的模拟波束成形的信息；
步骤52，根据所述模拟波束成形的信息，生成数字波束的成形码本；
步骤53，从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字；
步骤54，将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
该实施例中，终端和基站侧均可以采用相同的算法，所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字；其中，终端选择后，可以进一步将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。也就是说，上述步骤51-53既可以在基站侧执行，也可以在终端侧执行。
本公开的上述实施例中，步骤51可以包括：
步骤511，获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
本公开的上述实施例中，步骤52可以包括：
步骤521，对所述模拟波束成形的信息求秩，得到秩数；
步骤522，根据所述秩数，生成数字波束的成形码本；
具体的，步骤522可以包括：
步骤5221，根据所述秩数，确定波束的相空间维度；
步骤5222，获取所述相空间维度的信号强度；
步骤5223，根据所述相空间维度的信号强度，生成数字波束的成形码本；具体的，对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成数字波束的成形码本。
采用如图6所示的基于模拟波束成形信息的数字码本生成设备，根据当前模拟波束成形信息，如模拟波束宽度、模拟波束方向等信息，生成当前模拟波 束对应的数字波束成形码本，再从该码本中，选择对应的数字波束成形码字。
生成数字码本就是把信道空间进行分配。没有模拟波束情况下，信道一般是满秩的，数字端口数就等于相空间的维度；但是存在模拟波束后，信道就会很大程度上降秩。
上述步骤521和步骤522的具体过程如下：
步骤521，rank(模拟波束信息(宽度、方向)，数字端口数)，求秩；
步骤522，根据秩数，采用LTE DFT码本的生成方式生成数字码本，由于LTE只有2、4、8、16四种秩，第一步算出秩等于7，表示相空间维度为7，则可以采用LTE port＝8的码本(表示在8维空间内的各个方向)。
进一步的，求秩的过程中，采用svd算法可以知道每个相空间维度的强弱(svd(H)＝U*D*V)，如果某个方向强(D阵中大的那个方向)，此时码本多分配一些码字在这个方向，***波束成形在这个方向更精细，总体性能更优。
本公开的上述实施例所述的方法，在混合波束成形下，用户(或基站)在选定某一模拟波束后，根据当前模拟波束信息，动态生成当前信道对应的数字波束成形码本，今数字码本合理表征模拟波束内的相空间(不至于浪费部分数字码)，并从中选取最优码字进行数字波束成形。
且本公开的数字波束成形增益较传统的固定码本下的数字波束成形方案，大幅度提升；
且本公开可抑制模拟波束间干扰，可同时接入的终端数目，较传统的固定码本下的数字波束成形方案大幅提高。
进一步的，本公开的上述实施例的方法应用于低频段等传统宽波束场景，生成的即时数字波束成形码本，可认为是固定的版本，从而兼容传统4G***。
如图7所示，本公开的实施例还提供一种数字波束成形码本生成设备700，包括：
获取模块701，用于获取当前采用的模拟波束成形的信息；
生成模块702，用于根据所述模拟波束成形的信息，生成数字波束的成形码本。
其中，数字波束成形码本生成设备还包括：
选择模块，用于从所述数字波束的成形码本中，选择与当前信道匹配的数 字波束成形码字。
其中，数字波束成形码本生成设备还包括：
反馈模块，用于将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
其中，所述获取模块701具体用于：获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
其中，所述生成模块702具体用于：对所述模拟波束成形的信息求秩，得到秩数；根据所述秩数，生成数字波束的成形码本。
其中，所述生成模块在得到秩数后具体用于：根据所述秩数，确定波束的相空间维度；获取所述相空间维度的信号强度；根据所述相空间维度的信号强度，生成数字波束的成形码本。
其中，所述生成模块在根据所述相空间维度的信号强度，生成数字波束的成形码本时，具体用于：
对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成数字波束的成形码本。
其中，所述选择模块具体用于：
根据公式：
Figure PCTCN2018070763-appb-000007
从所述数字波束的成形码本V中，选择方向
与理想波束成形向量w最接近的码字v；其中，
Figure PCTCN2018070763-appb-000008
表示码本化的波束成形向量。
本公开的该设备可以是如图7中所示的设备，也可以是终端或者基站中的一个装置或者是终端设备或者是基站设备。该设备是与上述方法实施例中所有方法对应的设备，上述方法实施例中所有实现手段均适用于该设备的实施例中。
本公开的该设备同样在混合波束成形下，用户(或基站)在选定某一模拟波束后，根据当前模拟波束信息，动态生成当前信道对应的数字波束成形码本，今数字码本合理表征模拟波束内的相空间(不至于浪费部分数字码)，并从中 选取最优码字进行数字波束成形。
且本公开的数字波束成形增益较传统的固定码本下的数字波束成形方案，大幅度提升；
且本公开可抑制模拟波束间干扰，可同时接入的终端数目，较传统的固定码本下的数字波束成形方案大幅提高。
进一步的，该设备应用于低频段等传统宽波束场景，生成的即时数字波束成形码本，可认为是固定的版本，从而兼容传统4G***。
可以理解的是，上述方法实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现，处理单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits，ASIC)、数字信号处理器(Digital Signal Processing，DSP)、数字信号处理设备(DSP Device，DSPD)、可编程逻辑设备(Programmable Logic Device，PLD)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本申请功能的其它电子单元或其组合中。对于软件实现，可通过执行本文功能的模块(例如过程、函数等)来实现本文的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (20)

  1. 一种数字波束成形码本生成方法，包括：
    获取当前采用的模拟波束成形的信息；
    根据所述模拟波束成形的信息，生成数字波束的成形码本。
  2. 根据权利要求1所述的数字波束成形码本生成方法，还包括：
    从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字。
  3. 根据权利要求2所述的数字波束成形码本生成方法，还包括：
    将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
  4. 根据权利要求1-3任一项所述的数字波束成形码本生成方法，其中，所述获取当前采用的模拟波束成形的信息的步骤包括：
    获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
  5. 根据权利要求1或4所述的数字波束成形码本生成方法，其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
  6. 根据权利要求1-5任一项所述的数字波束成形码本生成方法，其中，所述根据所述模拟波束成形的信息，生成数字波束的成形码本的步骤包括：
    对所述模拟波束成形的信息求秩，得到秩数；
    根据所述秩数，生成所述数字波束的成形码本。
  7. 根据权利要求6所述的数字波束成形码本生成方法，其中，所述根据所述秩数，生成所述数字波束的成形码本的步骤包括：
    根据所述秩数，确定波束的相空间维度；
    获取所述相空间维度的信号强度；
    根据所述相空间维度的信号强度，生成所述数字波束的成形码本。
  8. 根据权利要求7所述的数字波束成形码本生成方法，其中，所述根据所述相空间维度的信号强度，生成所述数字波束的成形码本的步骤包括：
    对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成所述数字波束的成形码本。
  9. 根据权利要求2所述的数字波束成形码本生成方法，其中，所述从所 述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字的步骤包括：
    根据公式：
    Figure PCTCN2018070763-appb-100001
    从所述数字波束的成形码本V中，选择方向与理想波束成形向量w最接近的码字v；其中，
    Figure PCTCN2018070763-appb-100002
    表示码本化的波束成形向量。
  10. 一种数字波束成形码本生成设备，包括：
    获取模块，用于获取当前采用的模拟波束成形的信息；
    生成模块，用于根据所述模拟波束成形的信息，生成数字波束的成形码本。
  11. 根据权利要求10所述的数字波束成形码本生成设备，还包括：
    选择模块，用于从所述数字波束的成形码本中，选择与当前信道匹配的数字波束成形码字。
  12. 根据权利要求11所述的数字波束成形码本生成设备，还包括：
    反馈模块，用于将选择的所述当前信道匹配的数字波束成形码字，反馈给基站。
  13. 根据权利要求10-12任一项所述的数字波束成形码本生成设备，其中，所述获取模块具体用于：获取当前进行探测参考信号SRS配置采用的模拟波束成形的信息。
  14. 根据权利要求10或13所述的数字波束成形码本生成设备，其中，所述模拟波束成形的信息包括：模拟波束的宽度信息、模拟波束的旋转方向信息以及数字端口数。
  15. 根据权利要求10-14任一项所述的数字波束成形码本生成设备，其中，所述生成模块具体用于：对所述模拟波束成形的信息求秩，得到秩数；根据所述秩数，生成所述数字波束的成形码本。
  16. 根据权利要求15所述的数字波束成形码本生成设备，其中，所述生成模块在得到秩数后具体用于：根据所述秩数，确定波束的相空间维度；获取所述相空间维度的信号强度；根据所述相空间维度的信号强度，生成所述数字波束的成形码本。
  17. 根据权利要求16所述的数字波束成形码本生成设备，其中，所述生 成模块在根据所述相空间维度的信号强度，生成所述数字波束的成形码本时，具体用于：
    对于相空间维度的信号强度大于第一预设值的相空间维度上，分配多于第二预设值的码字，生成所述数字波束的成形码本。
  18. 根据权利要求11所述的数字波束成形码本生成设备，其中，所述选择模块具体用于：
    根据公式：
    Figure PCTCN2018070763-appb-100003
    从所述数字波束的成形码本V中，选择方向与理想波束成形向量w最接近的码字v；其中，
    Figure PCTCN2018070763-appb-100004
    表示码本化的波束成形向量。
  19. 一种数字波束成形码本生成设备，包括处理器和存储器，其中
    所述处理器，通过调用并执行所述存储器中所存储的程序或数据，用于获取当前采用的模拟波束成形的信息，并根据所述模拟波束成形的信息，生成数字波束的成形码本。
  20. 一种计算机可读存储介质，所述计算机可读存储介质上存储有实现如权利要求1-9中任一项所述的方法中的步骤的指令。
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