WO2013007169A1

WO2013007169A1 - Velocity measurement method and apparatus using pilot frequency

Info

Publication number: WO2013007169A1
Application number: PCT/CN2012/078298
Authority: WO
Inventors: 李晓皎; 石蕊; 毕海
Original assignee: 电信科学技术研究院
Priority date: 2011-07-08
Filing date: 2012-07-06
Publication date: 2013-01-17
Also published as: CN102325101B; CN102325101A

Abstract

Disclosed are a velocity measurement method and apparatus using a pilot frequency, relating to the field of communications, and used to improve the precision in measuring the moving velocity of a terminal, and reduce the complexity of a velocity measurement process. The method comprises: measuring the velocity of a terminal using a pilot frequency, obtaining a correct frequency domain channel response according to known data sent by the pilot frequency, obtaining a frequency domain channel variation parameter according to a difference of frequency domain channel responses between pilot frequencies in a specified time domain range, and determining a current moving velocity of the terminal according to the frequency domain channel variation parameter. In this way, the velocity measurement process is not affected by the fluctuations of signal amplitude, thereby effectively improving the precision of the velocity measurement algorithm. Moreover, the embodiments only use pilot frequencies received in a specified time domain range; the data processing amount is small and the processing time is relatively short, effectively reducing the complexity of the velocity measurement algorithm.

Description

一种采用导频测速的方法及装置本申请要求在 2011年 7月 8日提交中国专利局、申请号为 201110191296.6、发明名称为"一种釆用导频测速的方法及装置"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。技术领域本发明涉及通信领域，特别涉及一种釆用导频测速的方法及装置。背景技术在通信***中，终端的快速移动会产生较大的多谱勒频移，尤其在多径的场景下会造成信号幅度的快速衰落和信号相位的迅速变化，从而导致***性能的恶化。为了避免*** 性能受到终端快速移动的影响，现有技术中，接收端通常根据终端的当前移动速度，来对信道估计方式和信号检测相关算法进行自适应调整，此时就需要有较为准确的测速算法来支持这种自适应的调整策略。 Method and device for using pilot speed measurement The present application claims to be submitted to the Chinese Patent Office on July 8, 2011, the application number is 201110191296.6, and the invention name is "a method and device for using pilot frequency measurement" Priority is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and apparatus for pilot frequency measurement. BACKGROUND OF THE INVENTION In a communication system, rapid movement of a terminal generates a large Doppler shift, especially in a multipath scenario, which causes rapid fading of signal amplitude and rapid change of signal phase, resulting in deterioration of system performance. In order to avoid the system performance being affected by the fast movement of the terminal, in the prior art, the receiving end usually adaptively adjusts the channel estimation mode and the signal detection related algorithm according to the current moving speed of the terminal, and thus requires a relatively accurate speed measurement. Algorithms to support this adaptive tuning strategy.

现有的测速算法主要有以下几种： The existing speed measurement algorithms mainly include the following:

A、 Crossing Rate算法。 A, Crossing Rate algorithm.

Crossing Rate算法在实际的通信***中广为使用。具体为：多普勒频散会造成信号在时域上的起伏，总体上每移动半个波长的距离，信号幅度便会有一次深衰落，而 Crossing The Crossing Rate algorithm is widely used in practical communication systems. Specifically: Doppler dispersion causes the signal to fluctuate in the time domain. Generally, for every half wavelength of the distance, the signal amplitude will have a deep fading, and Crossing

Rate算法即是通过统计单位时间内电平衰落次数 Le, 估计出终端的移动速度；例如，假设载频为 fc, 光速为 c, 那么，可以估计出速度 v=c/fc*Le。 The Rate algorithm estimates the moving speed of the terminal by counting the number of level fadings per unit time. For example, if the carrier frequency is fc and the speed of light is c, then the speed v=c/fc*Le can be estimated.

显然， Crossing Rate算法的重点是如何准确统计 Le, 然而，实际应用中，信号会受到信道中的噪声和千扰的影响，从而在时域上出现很多小幅度的起伏，俗称毛刺，这些毛刺会影响 Le 的精确统计，即使预先对信号进行去毛刺处理，也无法保证毛刺的完全去除，从而进一步影响了终端移动速度的估计准确度；另一方面， Crossing Rate算法的精度并不高，且在低速传输下需要较长的统计时间，进而影响了***的整体运行效率。 Obviously, the focus of the Crossing Rate algorithm is how to accurately count Le. However, in practical applications, the signal will be affected by noise and interference in the channel, so that there are many small fluctuations in the time domain, commonly known as glitch, these glitch Influencing Le's accurate statistics, even if the signal is deburred in advance, the glitch cannot be completely removed, which further affects the estimation accuracy of the terminal moving speed. On the other hand, the accuracy of the Crossing Rate algorithm is not high, and Longer statistics require longer statistical time, which in turn affects the overall operating efficiency of the system.

B、相关性算法。 B. Correlation algorithm.

终端的快速移动会令信号在频域上出现多普勒频散，在 Rayleigh (瑞利）信道下接收信号时，信号的时域自相关值与多普勒频散呈以下关系： The fast movement of the terminal causes the signal to have Doppler dispersion in the frequency domain. When receiving the signal under the Rayleigh channel, the time domain autocorrelation value of the signal is related to the Doppler dispersion:

其中，表示信号的时域自相关值，该时域自相关值用以表征在时频上不同时刻的信号之间的相关程度，表示最大多普勒频散， r表示相关时间， σ²为噪声功率， J。(-) 表示 0阶第一类贝塞尔函数，该函数的曲线走向如图 1所示。通过上述公式（1 )可以看出，利用信号的时域自相关特性，统计信号的时域自相关值，并对照贝塞尔函数曲线进行查询，可以估计出多普勒频散/ _m , 接着，再根据预设的多普勒频散/„^ 端的移动速度之间的映射关系，便可以估计出终端当前的移动速度。

Wherein, representing a time domain autocorrelation value of the signal, the time domain autocorrelation value is used to represent the degree of correlation between signals at different times in the time and frequency, indicating the maximum Doppler dispersion, r represents the correlation time, and σ ² is Noise power, J. (-) It represents the first-order Bessel function of the 0th order, and the curve of the function goes as shown in Figure 1. It can be seen from the above formula (1) that by using the time domain autocorrelation property of the signal, the time domain autocorrelation value of the statistical signal, and querying against the Bessel function curve, the Doppler dispersion / _m can be estimated, and then Then, according to the mapping relationship between the preset Doppler dispersion/movement speed of the end, the current moving speed of the terminal can be estimated.

然而，实际应用中，相关性算法的统计特性只适用于 Rayleigh信道，对于其他信道则不适用。例如，在 Rician (莱斯）信道下，来波方向不是均匀分布的，且受到莱斯因子 K 的影响，公式（1 ) 需经莱斯因子 K修正后才能使用，但是，赖斯因子 K不易确定，从而难以在 Rician信道下使用相关性算法来估计终端的移动速度。此外，由图 1可知，贝塞尔函数并非单调函数，为了能准确估计出终端的移动速度，需要保证 2 r/_mT < 4 , 而在高速传输下多普勒频散 f_m的取值较大，则 τ的取值必须非常小才能进行多普勒频散 f_m的估计，这使得相关性算法在高速传输场景下的使用受到了较大限制。 However, in practical applications, the statistical properties of the correlation algorithm apply only to Rayleigh channels, but not to other channels. For example, under the Rician channel, the incoming wave direction is not uniformly distributed and is affected by the Rice factor K. The formula (1) needs to be corrected by the Rice factor K, but the Rice factor K is not easy to use. It is determined that it is difficult to use the correlation algorithm to estimate the moving speed of the terminal under the Rician channel. In addition, as can be seen from Fig. 1, the Bessel function is not a monotonic function. In order to accurately estimate the moving speed of the terminal, it is necessary to guarantee 2 r/ _m T < 4, and the value of Doppler dispersion f _m under high-speed transmission. Larger, the value of τ must be very small to estimate the Doppler dispersion f _m , which makes the use of correlation algorithms in high-speed transmission scenarios more limited.

另一方面，现有技术中，釆用上述两种测速算法估计终端的移动速度时，一般都是釆用全部接收信号进行信道估计后，使用得到的全带宽上的频域信道响应值统计全带宽上各个子载波的信道相关性或者 Le, 从而测量得到终端的移动速度，数据处理量较大，处理时间较长，从而令本次测量出的终端的移动速度只能在下一次进行信道估计和信号检测时使用，具有一定的时延，因此，难以实现较高的测量精度。发明内容本发明实施例提供一种釆用导频测速的方法及装置，用以提高终端移动速度的测量精度，同时降低测速流程的执行复杂度。 On the other hand, in the prior art, when estimating the moving speed of the terminal by using the above two speed measuring algorithms, generally all the received signals are used for channel estimation, and the frequency domain channel response values on the obtained full bandwidth are used for statistical analysis. The channel correlation or Le of each subcarrier in the bandwidth, so that the moving speed of the terminal is measured, the data processing amount is large, and the processing time is long, so that the measured moving speed of the terminal can only be used for the next channel estimation and It is used for signal detection and has a certain delay. Therefore, it is difficult to achieve high measurement accuracy. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and apparatus for measuring pilot speed using a pilot to improve the measurement accuracy of a terminal moving speed and reduce the execution complexity of the speed measuring process.

本发明实施例提供的具体技术方案如下： The specific technical solutions provided by the embodiments of the present invention are as follows:

一种釆用导频测速的方法，包括： A method for measuring pilot speed using a pilot, comprising:

接收传送端发送的无线子帧，并分别对各无线子帧携带的每一个导频进行信道估计，获得各导频的频域信道响应； Receiving a wireless subframe sent by the transmitting end, and performing channel estimation on each pilot carried in each wireless subframe to obtain a frequency domain channel response of each pilot;

根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数； Determining a corresponding frequency domain channel change parameter according to a difference of frequency domain channel responses between pilots within a specified time domain;

根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取对应所述频域信道变化参数设置的速度值，并基于该速度值确定所述终端当前的移动速度。 And obtaining, according to a mapping relationship between the preset frequency domain channel variation parameter and the terminal moving speed, a speed value corresponding to the frequency domain channel variation parameter setting, and determining a current moving speed of the terminal based on the speed value.

一种釆用导频测速的装置，包括： A device for measuring pilot speed, comprising:

通信单元，用于接收传送端发送的无线子帧，并分别对各无线子帧携带的每一个导频进行信道估计，获得各导频的频域信道响应； a communication unit, configured to receive a wireless subframe sent by the transmitting end, and perform channel estimation on each pilot carried in each wireless subframe to obtain a frequency domain channel response of each pilot;

第一处理单元，用于根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数； a first processing unit, configured to determine, according to a difference in frequency domain channel responses between pilots in a specified time domain range, Frequency domain channel variation parameters;

第二处理单元，用于根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取对应所述频域信道变化参数设置的速度值，并基于该速度值确定所述终端当前的移动速度。 a second processing unit, configured to acquire, according to a mapping relationship between a preset frequency domain channel variation parameter and a terminal moving speed, a speed value corresponding to the frequency domain channel variation parameter setting, and determine, according to the speed value, the terminal current The speed of movement.

本发明实施例中，测速装置釆用导频对终端进行测速，由于导频的发送数据是已知的，因此直接釆用 LS ( Least Squares, 最小二乘法）方法就可以得到较为准确的信道估计值，即频域信道响应 H, 从而令测速装置可以根据指定时域范围内的导频之间的频域信道响应的差值，来得到频域信道变化参数 AH , 并根据 AH确定终端当前的移动速度 V, 这样，测速过程不会受到信号幅度起伏的影响，从而有效提高了测速算法的测量精度，并且，本实施例中仅釆用在指定时域范围内接收的导频来进行测速，数据处理量小，处理时间相对较短，因而有效地降低了测速算法的执行复杂度，进一步地，由于测速操作是在对无线子帧携带的非导频信号进行信道估计之前进行的，因此，本次的测速结果可以直接用于本次对非导频信号的信道估计和信号检测过程，避免了因为时延造成的测速结果应用的滞后，从而进一步提高了信道估计和信号检测的准确性。附图说明 In the embodiment of the present invention, the speed measuring device uses the pilot to measure the speed of the terminal. Since the transmitted data of the pilot is known, a relatively accurate channel estimation can be obtained by directly using the LS (Least Squares) method. The value, that is, the frequency domain channel response H, so that the speed measuring device can obtain the frequency domain channel variation parameter AH according to the difference of the frequency domain channel response between the pilots in the specified time domain, and determine the current terminal according to the AH. The moving speed V, in this way, the speed measurement process is not affected by the fluctuation of the signal amplitude, thereby effectively improving the measurement accuracy of the speed measurement algorithm, and in this embodiment, only the pilot received in the specified time domain range is used for the speed measurement. The data processing amount is small, and the processing time is relatively short, thereby effectively reducing the execution complexity of the speed measurement algorithm. Further, since the speed measurement operation is performed before channel estimation of the non-pilot signal carried in the wireless subframe, therefore, The speed measurement result can be directly used for the channel estimation and signal detection process of the non-pilot signal. The lag of the application of the speed measurement result due to the delay is eliminated, thereby further improving the accuracy of channel estimation and signal detection. DRAWINGS

图 1为现有技术下第一类贝塞尔函数曲线图； 1 is a graph of a first type of Bessel function in the prior art;

图 2为本发明实施例中测速装置功能结构示意图； 2 is a schematic structural diagram of a speed measuring device according to an embodiment of the present invention;

图 3为本发明实施例中测速装置釆用导频对终端进行测速流程图。具体实施方式为了提高终端移动速度的测量精度，同时降低测速流程的执行复杂度，本发明实施例中，测速装置釆用导频来测量终端当前的移动速度，即通过统计导频的频域信道响应的差值来对终端当前的移动速度进行估计。 FIG. 3 is a flow chart of measuring speed of a speed measuring device using a pilot to a terminal according to an embodiment of the present invention. In the embodiment of the present invention, the speed measuring device uses the pilot to measure the current moving speed of the terminal, that is, the frequency domain channel through the statistical pilot, in order to improve the measurement accuracy of the terminal moving speed and reduce the execution complexity of the speed measuring process. The difference in response is used to estimate the current moving speed of the terminal.

进一步地，测速装置还可以通过一些接收端的常用测量量（如信噪比，最大多径时延等）来对测速算法进行优化，从而进一步提高测速算法的测量精度。 Further, the speed measuring device can optimize the speed measuring algorithm through common measurement quantities of the receiving end (such as signal to noise ratio, maximum multipath delay, etc.), thereby further improving the measurement accuracy of the speed measuring algorithm.

本发明实施例提供的技术方案可以应用于各种能够发送导频的通信***，如 TD-SCDMA( Time Division-Synchronous Code Division Multiple Access,时分同步码分多址） ***、 LTE ( Long Term Evolution, 长期演进）***、 LTE- A ( Long Term Evolution- Advance, 长期演进增强）***等等。同时，上述测速装置可以是网络侧的基站，也可以是终端自身，若为基站，则基站可以根据上行导频测量上行信道的变化，若为终端，则终端可以根据下行导频测量下行信道的变化，从而基站和终端都能够得到精确的终端当前移动速度。下面以 LTE***为例，结合附图对本发明优选的实施方式进行详细说明。参阅图 2所示，本发明实施例中，测速装置包括通信单元 20、第一处理单元 21和第二处理单元 22, 其中， The technical solution provided by the embodiment of the present invention can be applied to various communication systems capable of transmitting pilots, such as a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, and LTE (Long Term Evolution, Long Term Evolution) system, LTE-A (Long Term Evolution-Advance) system, etc. At the same time, the speed measuring device may be a base station on the network side, or may be the terminal itself. If the base station is used, the base station may measure the change of the uplink channel according to the uplink pilot. If the terminal is the terminal, the terminal may measure the downlink channel according to the downlink pilot. The change, so that both the base station and the terminal can obtain the exact current moving speed of the terminal. The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Referring to FIG. 2, in the embodiment of the present invention, the speed measuring device includes a communication unit 20, a first processing unit 21, and a second processing unit 22, where

通信单元 20, 用于接收传送端发送的无线子帧，并分别对各无线子帧携带的每一个导频进行信道估计，获得各导频的频域信道响应； The communication unit 20 is configured to receive a wireless subframe sent by the transmitting end, and perform channel estimation on each pilot carried in each wireless subframe to obtain a frequency domain channel response of each pilot.

第一处理单元 21 , 用于根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数； The first processing unit 21 is configured to determine, according to a difference in a frequency domain channel response between pilots in a specified time domain range, a corresponding frequency domain channel variation parameter;

第二处理单元 22, 用于根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取所述确定的频域信道变化参数对应的速度值，并基于该速度值确定终端当前的移动速度。 The second processing unit 22 is configured to acquire, according to a mapping relationship between the preset frequency domain channel variation parameter and the terminal moving speed, a speed value corresponding to the determined frequency domain channel variation parameter, and determine, according to the speed value, the terminal current The speed of movement.

如图 2所示，测量装置中进一步包括第三处理单元 23 , 用于在第二处理单元 22确定终端当前的移动速度后，根据该移动速度对指定时频范围内接收的非导频信号进行信道估计和信号检测。 As shown in FIG. 2, the measuring device further includes a third processing unit 23, configured to perform, after the second processing unit 22 determines the current moving speed of the terminal, the non-pilot signal received in the specified time-frequency range according to the moving speed. Channel estimation and signal detection.

基于上述实施例，参阅图 3 所示，本实施例中，测速装置对终端进行测速的详细流程如下： Based on the above embodiment, referring to FIG. 3, in this embodiment, the detailed process of measuring the speed of the terminal by the speed measuring device is as follows:

步骤 300: 测速装置接收传送端发送的无线子帧，并分别对无线子帧携带的每一个导频进行信道估计，获得各导频的频域信道响应。 Step 300: The speed measuring device receives the wireless subframe sent by the transmitting end, and performs channel estimation on each pilot carried in the wireless subframe, respectively, to obtain a frequency domain channel response of each pilot.

通信***中，无线信号都是以无线子帧的形式发送的，每个无线子帧中同一频域位置通常携带有多个导频，本实施例中，测速装置即是通过对无线子帧携带的导频进行信道估计，从而实现对终端的测速。另一方面，上述传送端为基站时，测速装置为终端，即终端对自身进行测速；而上述传送端为终端时，测速装置为基站，即基站对终端进行测速。 In the communication system, the wireless signals are transmitted in the form of a wireless sub-frame, and the same frequency domain position in each wireless sub-frame usually carries multiple pilots. In this embodiment, the speed measuring device is carried by the wireless sub-frame. The pilot performs channel estimation to achieve speed measurement of the terminal. On the other hand, when the transmitting end is a base station, the speed measuring device is a terminal, that is, the terminal speeds itself; and when the transmitting end is a terminal, the speed measuring device is a base station, that is, the base station performs speed measurement on the terminal.

本实施例中，以 LTE***为例，将任一导频的频域信道响应记为 HO ) , 其中， n表示时域上导频所在的 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用）符号的位置， k表示频域上导频所在的频域子载波的索引，即 H(«, t)表示第 n个 OFDM符号的第 k个子载波上的导频的频域信道响应；其中，较佳的，在 LTE***中， n = 0, 4 ( 0 和 4为导频所在的 OFDM符号的位置）；而为保证各种带宽配置下性能一致， k在不同带宽下可取频域位置完全相同的 PRB ( Physical Resource Block, 物理资源块）上的导频子载波的索引，例如，在 20M带宽下， ***内包含有 100个 PRB, 而在 1.4M带宽下， ***内包含有 6个 PRB, 而 1.4M带宽下的 6个 PRB上的导频子载波和 20M带宽下的 100PRB 内位于中间位置的 6个 PRB上的导频子载波占用的频域资源是相同的，因此，为了保证配置一致性，可以将上述中间位置的 6个 PRB上的导频子载波的索引作为 k的取值。 In this embodiment, the LTE system is taken as an example, and the frequency domain channel response of any pilot is recorded as HO), where n represents the OFDM in the time domain (Orthogonal Frequency Division Multiplexing). The position of the symbol, k represents the index of the frequency domain subcarrier in which the pilot in the frequency domain is located, that is, H(«, t) represents the frequency domain channel response of the pilot on the kth subcarrier of the nth OFDM symbol; Preferably, in the LTE system, n = 0, 4 (0 and 4 are the positions of the OFDM symbols where the pilots are located); and to ensure consistent performance in various bandwidth configurations, k can take frequency domain positions under different bandwidths. The index of the pilot subcarrier on the same physical block (PRB), for example, in the 20M bandwidth, the system contains 100 PRBs, and in the 1.4M bandwidth, there are 6 in the system. The PRB, and the pilot subcarriers on the six PRBs in the 1.4M bandwidth and the pilot subcarriers on the six PRBs in the intermediate position in the 100PRB in the 20M bandwidth occupy the same frequency domain resources. Therefore, in order to ensure Configuration consistency, Turned on so as to index the intermediate position PRB 6 pilot sub-carriers as the value of k.

另一方面，较佳的，为了进一步提高测速的精确度，测速装置在获得各导频的频域信道响应后，可以先进行抑噪处理，再执行步骤 310。当然，若信道环境处于较为理想状态，则为了提高了测速装置的处理速度，也可以不执行抑噪处理。抑噪处理的执行与否，可以视具体的应用环境而灵活设定，在此不再赘述。 On the other hand, in order to further improve the accuracy of the speed measurement, the speed measuring device may perform the noise suppression processing after obtaining the frequency domain channel response of each pilot, and then perform step 310. Of course, if the channel environment is in an ideal state, In order to increase the processing speed of the speed measuring device, the noise suppression processing may not be performed. The execution of the noise suppression processing can be flexibly set according to the specific application environment, and will not be described here.

步骤 310: 测速装置根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数。 Step 310: The speed measuring device determines a corresponding frequency domain channel variation parameter according to a difference of frequency domain channel responses between pilots in a specified time domain range.

本实施例中，假设指定的时域范围是 N个无线子帧， N取正整数，这 N个无线子帧在时域上可以是连续的，也可以是不连续的，若为不连续的，则 N个无线子帧之间相隔的周期可以预先设定，那么，步骤 310的具体执行方式如下： In this embodiment, it is assumed that the specified time domain range is N radio subframes, and N is a positive integer. The N radio subframes may be continuous or discontinuous in the time domain, and may be discontinuous. Then, the period between the N radio subframes can be preset. Then, the specific execution manner of step 310 is as follows:

步骤 A, 测速装置针对在指定的 N个无线子帧内接收的各导频，以每两个频域位置相同的相邻导频为一组，分别计算每一个导频组内两导频间的频域信道响应的差值； Step A: The speed measuring device calculates, for each pilot received in the specified N radio subframes, a pair of adjacent pilots having the same position in each of the two frequency domains, and respectively calculating between two pilots in each pilot group. The difference in frequency domain channel response;

步骤 B , 测速装置分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定相应的频域信道变化参数。 Step B: The speed measuring device respectively performs a modulus processing on the difference of the frequency domain channel response corresponding to each pilot group, and determines a corresponding frequency domain channel variation parameter based on the modulo processing result.

其中，步骤 B的执行方式包含但不限于以下两种： The execution manner of step B includes but is not limited to the following two types:

第一种方式为：分别计算每一个导频组对应的频域信道响应的差值的模平方，并计算获得各导频组对应的频域信道响应的差值的模平方的平均值，以及将该平均值或者该平均值的开方值，确定为频域信道变化参数。 The first mode is: separately calculating a modulus square of a difference of a frequency domain channel response corresponding to each pilot group, and calculating an average value of a modulus square of a difference of frequency domain channel responses corresponding to each pilot group, and The average value or the square root value of the average value is determined as a frequency domain channel variation parameter.

例如，本实施例中，将任意一个导频组内两导频间的频域信道响应的差值的模平方记为（ H ')² , 则（ H ')²的计算方式如下： For example, in this embodiment, the modulus square of the difference of the frequency domain channel responses between the two pilots in any one of the pilot groups is (H ') ² , and then ( H ') ² is calculated as follows:

其中， N_f表示子载波的数目 Where N _f represents the number of subcarriers

那么，测速装置可以根据上述公式，分别计算获得每一个导频组对应的频域信道响应的差值的模平方，再求其平均值，即 Ν个无线子帧内包含的各导频组对应的 H'f的平均值，最后，测速装置将获得的平均值作为频域信道变化参数，记为 AH , 或者，将获得的平均值进行开方，即对各导频组对应的 ')²的平均值进行开方，并将开方值作为频域信道变化参数，记为 AH；本实施例中，执行开方操作时，可以釆用公式 Then, the speed measuring device can separately calculate the modulus square of the difference of the frequency domain channel response corresponding to each pilot group according to the above formula, and then obtain an average value thereof, that is, corresponding to each pilot group included in the wireless subframes. The average value of H'f, finally, the average value obtained by the speed measuring device is taken as the frequency domain channel variation parameter, which is denoted as AH, or the average value obtained is squared, that is, the corresponding one for each pilot group ² ) The average value is squared out, and the square root value is taken as the frequency domain channel variation parameter, and is recorded as AH. In this embodiment, when the square root operation is performed, the formula can be used.

AH = E ( ') AH = E ( ')

其中， E表示求平均值。 Where E represents the averaging.

第二种方式为：分别计算每一个导频组对应的频域信道响应的差值的模，并计算获得各导频组对应的频域信道响应的差值的模的平均值，以及将该平均值确定为频域信道变化参数。 The second mode is: separately calculating a modulus of a difference of a frequency domain channel response corresponding to each pilot group, and calculating an average value of a modulus of obtaining a difference of a frequency domain channel response corresponding to each pilot group, and The average value is determined as the frequency domain channel change Parameters.

例如，本实施例中，将任意一个导频组内两导频间的频域信道响应的差值的模记为 ( )² , 其中，（ H')²的计算方式同上述公式，不再赘述。那么，测速装置可以根据公式 ( )²分别计算获得每一个导频组对应的频域信道响应的差值的模，再求其平均值，即 N个无线子帧内包含的各导频组对应的 δΗ')²的平均值, 最后，测速装置将获得的平均值作为频域信道变化参数 , 记为 AH。 For example, in this embodiment, the difference of the frequency domain channel response between two pilots in any one pilot group is ( ² ), where (H') ² is calculated in the same manner as the above formula, and is no longer Narration. Then, the speed measuring device can separately calculate the modulus of obtaining the difference of the frequency domain channel response corresponding to each pilot group according to the formula ( ) ² , and then obtain an average value thereof, that is, corresponding to each pilot group included in the N wireless subframes. The average value of δΗ') ² , finally, the average value obtained by the speed measuring device is taken as the frequency domain channel variation parameter, and is recorded as AH.

步骤 320: 测速装置根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取上述确定的频域信道变化参数对应的速度值，并基于该速度值确定终端当前的移动速度。 Step 320: The speed measuring device obtains the speed value corresponding to the determined frequency domain channel variation parameter according to the mapping relationship between the preset frequency domain channel variation parameter and the terminal moving speed, and determines the current moving speed of the terminal based on the speed value.

本发明实施例中，在设置频域信道变化参数 AH和终端的移动速度 V之间的映射关系时，可以釆用的设置方式包含但不限于以下两种： In the embodiment of the present invention, when setting the mapping relationship between the frequency domain channel change parameter AH and the moving speed V of the terminal, the setting manners that can be used include but are not limited to the following two types:

第一种设置方式为：当信道环境处于较为理想的状态时（如，抑噪算法的性能较好、信道中不存在过强的噪声、信道中不存在过长时延等等），此时，可以针对不同的信道状态设置统一的频域信道变化参数 AH和终端的移动速度 V之间的映射关系。 The first setting method is: When the channel environment is in an ideal state (for example, the performance of the noise suppression algorithm is good, there is no excessive noise in the channel, there is no excessive delay in the channel, etc.) The mapping relationship between the unified frequency domain channel variation parameter AH and the moving speed V of the terminal may be set for different channel states.

例如，可以将上述映射关系设置为拟合公式 = F(AH) , 如： For example, you can set the above mapping relationship to the fitting formula = F(AH) , such as:

k snr -AH+b snr k snr -AH+b snr

σ σ

-123.78σ³-755.38σ²-85.75σ-0.85,ν<90 其中， σ = ^表示噪声的幅度值，此处可取当前所处环境在一般情况下的值，如,-123.78σ ³ -755.38σ ² -85.75σ-0.85, ν<90 where σ = ^ represents the amplitude value of the noise, where the current environment can be taken as a general value, eg,

0.1 0.1

又例如，也可以将上述映射关系设置为映射表 AH-V; 如 For another example, the above mapping relationship may also be set to the mapping table AH-V;

表 1 Table 1

170 1.0724

190 1.1501 190 1.1501

釆用第一种设置方式设置上述映射关系时，在执行步骤 310获得 AH后，可以直接根据该映射关系获得对应的 V, 从而确定终端的当前移动速度。 When the first mapping mode is used to set the mapping relationship, after obtaining the AH in step 310, the corresponding V can be directly obtained according to the mapping relationship, thereby determining the current moving speed of the terminal.

第二种设置方式为：在信道环境未处于较为理想的状态时，可以基于信道状态参数，针对不同的信道状态分别设置相应的映射关系；其中，所谓的信道状态参数，可以是信道的 S R (信噪比），或 /和，信道的最大多径时延。 The second setting mode is: when the channel environment is not in a ideal state, the corresponding mapping relationship may be set for different channel states based on the channel state parameter; wherein the so-called channel state parameter may be the SR of the channel ( Signal to noise ratio), or / and, the maximum multipath delay of the channel.

例如，可以根据不同的 S R或 /和最大多径时延，分别设置相应的拟合 = F(AH,SNR) , 如： For example, you can set the corresponding fit = F(AH, SNR) according to different S R or / and maximum multipath delay, such as:

v = k^-AH+b, v = k^-AH+b,

σ = σ =

最大多径时延小于 5 / The maximum multipath delay is less than 5 /

-107.73σ³ +400.66ί7²-19.38ί7 + 211.57,ν>90 -107.73σ ³ +400.66ί7 ² -19.38 ί7 + 211.57, ν>90

k. k.

-97.21σ³ +848.14σ² + 238.43σ + 127.33,ν<90 -97.21σ ³ +848.14σ ² + 238.43σ + 127.33, ν<90

81.72σ³ -452.23σ² +60.96σ-58.33,ν> 90 81.72σ ³ -452.23σ ² +60.96σ-58.33,ν> 90

b b

-123.78σ³ -755.38σ²-85.75σ-0.85,ν<90 -123.78σ ³ -755.38σ ² -85.75σ-0.85, ν<90

最大多径时延大于 5 / Maximum multipath delay is greater than 5 /

-73.36σ³ +401.54σ²+23.49σ + 227.14,ν>90 -73.36σ ³ +401.54σ ² +23.49σ + 227.14,ν>90

k. k.

-248.63σ³ + 751.28σ² + 344.96σ + 170.95, ν<90 -248.63σ ³ + 751.28σ ² + 344.96σ + 170.95, ν<90

24.44σ³ - 430.52σ² - 18.82σ - 27.66, > 90 24.44σ ³ - 430.52σ ² - 18.82σ - 27.66, > 90

b b

140.68σ³ - 908.97σ² - 96.Ί3σ - 0.03, ν<90 又例如，还可以根据不同的 SNR 或 /和最大多径时延，分别设置相应的映射表 AH-V(S R), 如： 140.68σ ³ - 908.97σ ² - 96. Ί 3σ - 0.03, ν < 90 For example, the corresponding mapping table AH-V(SR) can also be set according to different SNR or / and maximum multipath delay, such as:

表 2 Table 2

170 1.0819 1.0048 0.9511 0.9172 0.8982 0.8877 0.8821 0.8790 0.8775 0.8766 0.8761

190 1.1085 1.0445 1.0023 0.9765 0.9627 0.9562 0.9525 0.9506 0.9495 0.9490 0.9488 表 3 190 1.1085 1.0445 1.0023 0.9765 0.9627 0.9562 0.9525 0.9506 0.9495 0.9490 0.9488 Table 3

釆用第二种设置方式设置上述映射关系时，在执行步骤 310获得 AH后，可以进一步确定当前信道的 S R或 /和最大多径时延，并获取对应该 S R或 /和最大多径时延预设的映射关系，再根据该映射关系获得对应的 V, 从而确定终端的当前移动速度。其中，所谓的确定当前信道的 S R或 /和最大多径时延，可以是在获得 AH之前预先测量信道的 S R或 / 和最大多径时延，也可以是在获得 AH后，实时测量信道的 S R或 /和最大多径时延；本实施例中，结合 SNR或 /和最大多径时延来对终端的进行测速，可以进一步优化测速算法，提高测速结果的准确度，并且， SNR或 /和最大多径时延仅是信道状态参数的一种举例，实际应用中并不局限于此，在此不再赘述。

When the mapping relationship is set in the second mode, after obtaining the AH in step 310, the SR or/and the maximum multipath delay of the current channel may be further determined, and the corresponding SR or/and the maximum multipath delay are obtained. The preset mapping relationship is obtained according to the mapping relationship, thereby determining the current moving speed of the terminal. The so-called determining the SR or/and the maximum multipath delay of the current channel may be pre-measuring the SR or/and the maximum multipath delay of the channel before obtaining the AH, or may be measuring the channel in real time after obtaining the AH. SR or / and maximum multipath delay; In this embodiment, combining the SNR or / and the maximum multipath delay to measure the speed of the terminal, the speed measurement algorithm can be further optimized, the accuracy of the speed measurement result is improved, and SNR or / The maximum multipath delay is only an example of the channel state parameter. The actual application is not limited thereto, and details are not described herein.

实际应用中，在设置上述映射关系时，可以釆用以下实现方法：仿真终端进行匀速运动，分别统计每一种 "最大多径时延 - SNR -移动速度 V"下 H的平均值。根据统计的 H 的平均值建立不同时延场景下的拟合公式 = F(AH,SNR), 或者，建立不同时延场景下的映射表 "AH-V(SNR)"。其中，仿真计算任意一种 "最大多径时延 -S R -移动速度 V" 下 AH的平均值的具体流程为： In practical applications, when setting the above mapping relationship, the following implementation methods can be used: The simulation terminal performs uniform motion and separately counts the average value of H under each of the "maximum multipath delay - SNR - moving speed V". Based on the average value of the statistics, the formula for the different delay scenarios is established = F(AH, SNR), or the mapping table "AH-V(SNR)" in different delay scenarios is established. Among them, the specific process of simulating the average value of AH under any "maximum multipath delay -S R - moving speed V" is:

对仿真的无线子帧中携带的各导频进行信道估计，获得各导频的频域信道响应 H( n,k) 并进行抑噪处理； Channel estimation is performed on each pilot carried in the simulated wireless subframe, and the frequency domain channel response H(n, k) of each pilot is obtained and noise suppression processing is performed;

对抑噪处理后的 H (n,k)信道进行统计，以每两个导频为一组，分别计算每一个导频组内的频域信道响应的差值的模平方 , 的计算方法和测速算法中相同；统计 Calculating the H (n, k) channel after the noise suppression process, and calculating the modulus square of the difference of the frequency domain channel response in each pilot group by using each of the two pilots as a group The same in the speed measurement algorithm; statistics

M个无线子帧内导频组的、δΗ、、²的平均值之后开方得到 AH = JE (δΗ ') 其中，通常 M»N,因为 M的取值要足够大才能保证生成的映射公式具有较高的精度，从而保证测量精度，判断 M的取值是否足够大的标准是确定继续增大 M后， AH的统计结果是否稳定，（如，在 LTE***内，一般 M的数量级在千帧以上）。 N的取值取决于终端所能达到的加速度和测量所需精度，通常终端的加速度较高则 N的值就应该设置的较小，例如，在 LTE***中，若最高加速度为 2.8 Aw/ , 则 N设置为 100, 最多会引入的测量误差为 \0 kmlh , 从而保证测量值相对真实值的时延不会过高，以及由此引入的最大测量误差不会过大；而终端为匀速运动时， N的值越高则测量精度越高。 The average value of δΗ, and ² of the pilot group of M wireless sub-frames is obtained after the square root is obtained. AH = JE (δΗ ') where, usually M»N, because the value of M is large enough to ensure that the generated mapping formula has higher precision, thus ensuring the measurement accuracy, the criterion for judging whether the value of M is large enough is After determining whether to continue to increase M, the statistics of AH are stable (for example, in the LTE system, the order of M is generally more than a thousand frames). The value of N depends on the acceleration that the terminal can achieve and the accuracy required for the measurement. Generally, the value of N should be set to a small value when the acceleration of the terminal is high. For example, in the LTE system, if the maximum acceleration is 2.8 Aw/, Then N is set to 100, and the maximum measurement error introduced is \0 kmlh, so that the delay of the measured value relative to the true value is not too high, and the maximum measurement error introduced thereby is not excessive; and the terminal is uniform motion When the value of N is higher, the measurement accuracy is higher.

上述映射关系能够区分的时延场景取决于时延测量算法能够区分的时延类型，如果没有必要进行最大多径时延的估计，则在仿真时需要将各时延场景的统计结果 AH进行平均后，再建立唯一的映射关系，如，建立唯一的拟合公式 = F (AH, SNR) , 或者，建立唯一的映射表 " AH - V(SNR) "。 The delay scenario that can be distinguished by the mapping relationship depends on the delay type that the delay measurement algorithm can distinguish. If the estimation of the maximum multipath delay is not necessary, the statistical result AH of each delay scenario needs to be averaged during the simulation. After that, establish a unique mapping relationship, such as establishing a unique fitting formula = F (AH, SNR), or, to establish a unique mapping table "AH - V(SNR)".

由此可见，在 LTE***中，在记录 H ( n,k ) 时，若将中间位置的 6个 PRB的索引作为 k的取值，则可以在各种带宽配置下使用相同的 AH和 V之间的映射关系，当然，为了提高测量精确度，也可以针对不同带宽配置使用频域资源不完全相同的 PRB的索引作为 k 的取值，这需要针对不同的带宽配置分别仿真建立 AH和 V之间的映射关系，在此不再赘述。 It can be seen that in the LTE system, when H ( n, k ) is recorded, if the index of the six PRBs in the middle position is taken as the value of k, the same AH and V can be used in various bandwidth configurations. In addition, in order to improve the measurement accuracy, the index of the PRB whose frequency domain resources are not identical may be used as the value of k for different bandwidth configurations. This requires separately simulating the establishment of AH and V for different bandwidth configurations. The mapping relationship between them will not be described here.

另一方面，在上述步骤 320中，获取对应 AH设置的速度值，并基于该速度值确定终端当前的移动速度 V时，其执行方式包含但不限于以下两种： On the other hand, in the above step 320, the speed value corresponding to the AH setting is obtained, and when the current moving speed V of the terminal is determined based on the speed value, the execution manner thereof includes but is not limited to the following two types:

第一种执行方式：直接将获得的速度值作为终端当前的移动速度 V； The first execution mode: directly obtain the obtained speed value as the current moving speed V of the terminal;

第二种执行方式：对获得的速度值进行平滑处理，并将平滑处理结果作为终端当前的移动速度 V。 The second execution mode: smoothing the obtained speed value, and using the smoothing result as the current moving speed V of the terminal.

平滑处理的方式有很多，例如，获取本次测量之前，经 K次测量后获得的 K个速度值，再加上本次测量获得的速度值，求平均值，并将该平均值作为终端当前的移动速率 V。 There are many ways to smooth the processing. For example, before acquiring this measurement, the K speed values obtained after K measurements, plus the speed value obtained by this measurement, are averaged, and the average value is used as the terminal current. The rate of movement of V.

在上述实施例中，测速操作是在对 N个无线子帧携带的非导频信号进行信道估计之前进行的，由于本实施例中仅釆用在 N个无线子帧内（非全带宽）接收的导频来进行测速，因此数据处理量小，处理时间相对较短，从而令本次获得的测速结果可以直接用于本次对非导频信号的信道估计和信号检测过程，在对非导频信号进行信道估计时，需要先获得时域滤波矩阵：时域滤波矩阵的生成和最大多普勒频移相关，据测量获得的终端的移动速度可勒频移

In the foregoing embodiment, the speed measurement operation is performed before performing channel estimation on the non-pilot signals carried in the N radio subframes, and is only used in the N radio subframes (not full bandwidth) in this embodiment. The pilot is used for speed measurement, so the data processing amount is small and the processing time is relatively short, so that the obtained speed measurement result can be directly used for the channel estimation and signal detection process of the non-pilot signal, and the non-guided When the frequency signal is used for channel estimation, the time domain filter matrix needs to be obtained first: the generation of the time domain filter matrix is related to the maximum Doppler shift, and the moving speed of the terminal obtained according to the measurement is scalable.

V表示终端的移动速度，表示电磁波的波长， /表示工作频率，根据/皿和当前釆用的信道估计谱型，如 Jakes语，釆用公式 R(T) = J。(2 r/_maxT)可以计算信号间的时域相关性从而生成时域滤波矩阵，接着，便可以根据生成的时域滤波矩阵进行信道估计；当然，时域滤波矩阵也可以不用基于终端的移动速度实时计算，而是设定不同的速度等级，提前预存几个时域滤波矩阵，然后根据当前测量获得的终端的移动速度选择相应的时域滤波矩阵，并根据选择的时域滤波矩阵进行信道估计。 V indicates the moving speed of the terminal, indicating the wavelength of the electromagnetic wave, / indicates the operating frequency, according to / dish and current 釆 The channel estimation spectrum used, such as Jakes, uses the formula R(T) = J. (2 r/ _max T) can calculate the time domain correlation between signals to generate a time domain filter matrix. Then, channel estimation can be performed according to the generated time domain filter matrix. Of course, the time domain filter matrix can also be used without terminal. The moving speed is calculated in real time, but different speed levels are set, several time domain filtering matrices are pre-stored in advance, and then the corresponding time domain filtering matrix is selected according to the moving speed of the terminal obtained by the current measurement, and according to the selected time domain filtering matrix. Channel estimation.

而在对非导频信号进行信号检测时，基站如果获知终端处于高速状态，可以通过多天线联合检测等方法，提高高速环境下的检测性能。 When the signal detection is performed on the non-pilot signal, if the base station knows that the terminal is in the high-speed state, it can improve the detection performance in a high-speed environment by means of multi-antenna joint detection.

实际应用中，上述技术方案具有广泛的适用性，可以适用于各种能够发送导频的通信 ***，例如， TD-SCDMA***、 LTE***、 LTE - A***等等，进一步地，还可以同时应用于 TDD双工***和 FDD双工***。其中，当应用于 TD-SCDMA***时，不存在频域带宽的问题，而当应用于 LTE***时，终端占用的频域资源大小不同，导频带宽也不同，因此，为了保证测速装置能够周期性地获得传送端发送的导频，较佳的，当传送端发送的是上行无线子帧时，该无线子帧携带的导频为 DMRS ( DeModulation Reference Signal , 解调参考信号），或者， SRS ( Sounding Reference Symbol, 探测参考信号），而当传送端发送的是下行无线子帧时，该无线子帧携带的导频为 CRS ( Cell Reference Signal, 小区参考信号）。 In practical applications, the above technical solutions have wide applicability and can be applied to various communication systems capable of transmitting pilots, for example, TD-SCDMA systems, LTE systems, LTE-A systems, etc., and further, can also be applied simultaneously. For TDD duplex systems and FDD duplex systems. When applied to the TD-SCDMA system, there is no problem of frequency domain bandwidth. When applied to the LTE system, the frequency domain resources occupied by the terminal are different in size and the pilot bandwidth is different. Therefore, in order to ensure that the speed measuring device can cycle Preferably, the pilot transmitted by the transmitting end is obtained. Preferably, when the transmitting end sends the uplink wireless subframe, the pilot carried by the wireless subframe is a DMRS (DeModulation Reference Signal), or, SRS (Sounding Reference Symbol), and when the transmitting end transmits a downlink wireless subframe, the pilot carried by the wireless subframe is a CRS (Cell Reference Signal).

综上所述，本发明实施例中，测速装置釆用导频对终端进行测速，由于导频的发送数据是已知的，因此直接釆用 LS ( Least Squares, 最小二乘法）方法就可以得到较为准确的信道估计值，即频域信道响应 H, 从而令测速装置可以根据指定时域范围内的导频之间的频域信道响应的差值，来得到频域信道变化参数 AH , 并根据 AH确定终端当前的移动速度 V, 这样，测速过程不会受到信号幅度起伏的影响，从而有效提高了测速算法的测量精度，并且，本实施例中仅釆用在指定时域范围内接收的导频来进行测速，数据处理量小，处理时间相对较短，因而有效地降低了测速算法的执行复杂度，进一步地，由于测速操作是在对无线子帧携带的非导频信号进行信道估计之前进行的，因此，本次的测速结果可以直接用于本次对非导频信号的信道估计和信号检测过程，避免了因为时延造成的测速结果应用的滞后，从而进一步提高了信道估计和信号检测的准确性。 In summary, in the embodiment of the present invention, the speed measuring device uses the pilot to measure the speed of the terminal. Since the transmission data of the pilot is known, the LS (Least Squares) method can be directly used. The more accurate channel estimation value, that is, the frequency domain channel response H, so that the speed measuring device can obtain the frequency domain channel variation parameter AH according to the difference of the frequency domain channel response between the pilots in the specified time domain range, and according to The AH determines the current moving speed V of the terminal, so that the speed measurement process is not affected by the fluctuation of the signal amplitude, thereby effectively improving the measurement accuracy of the speed measurement algorithm, and, in this embodiment, only the guidance received in the specified time domain range is used. The frequency is measured by the frequency, the data processing amount is small, and the processing time is relatively short, thereby effectively reducing the execution complexity of the speed measurement algorithm. Further, since the speed measurement operation is performed on the channel estimation of the non-pilot signal carried in the wireless subframe. Therefore, the speed measurement result can be directly used for the channel estimation and signal of the non-pilot signal. Metrology process, avoiding the delay caused by the hysteresis of the speed as a result of the application, thereby further improving the accuracy of channel estimation and signal detection.

进一步地，通过实验可以获知，本发明实施例提供的技术方案适用于各种能够发送导频的通信***，具有广泛的适用性，并且在各种通信***中均能保证测速结果的高精度 , 具有较好的鲁棒性。 Further, it can be known through experiments that the technical solution provided by the embodiments of the present invention is applicable to various communication systems capable of transmitting pilots, has wide applicability, and can ensure high precision of the speed measurement results in various communication systems. Has better robustness.

本领域内的技术人员应明白，本发明的实施例可提供为方法、 ***、或计算机程序产品。因此，本发明可釆用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介盾（包括但不限于磁盘存储器、 CD-ROM、光学存储器等）上实施的计算机程序产品的形式。 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is applicable to computer programs implemented on one or more computer usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is included. The form of the product.

本发明是参照根据本发明实施例的方法、设备（***）、和计算机程序产品的流程图和 /或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。 The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

1、一种釆用导频测速的方法，其特征在于，包括： A method for measuring pilot speed using a pilot, characterized in that it comprises:

根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取所述确定的频域信道变化参数对应的速度值，并基于该速度值确定所述终端当前的移动速度。 Obtaining, according to a mapping relationship between the preset frequency domain channel variation parameter and the terminal moving speed, a speed value corresponding to the determined frequency domain channel variation parameter, and determining a current moving speed of the terminal based on the speed value.

2、如权利要求 1所述的方法，其特征在于，所述传送端为基站或者终端。 2. The method according to claim 1, wherein the transmitting end is a base station or a terminal.

3、如权利要求 1 所述的方法，其特征在于，获得各导频的频域信道响应后，在根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数之前，对各导频的频域信道响应进行抑噪处理。 3. The method according to claim 1, wherein after obtaining a frequency domain channel response of each pilot, determining a corresponding frequency according to a difference of frequency domain channel responses between pilots within a specified time domain range. Before the domain channel change parameter, the frequency domain channel response of each pilot is subjected to noise suppression processing.

4、如权利要求 1 所述的方法，其特征在于，根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数，包括： The method according to claim 1, wherein the determining the frequency domain channel variation parameter according to the difference between the frequency domain channel responses between the pilots in the specified time domain range includes:

针对在指定的 N个无线子帧内接收的各导频，以每两个频域位置相同的相邻导频为一组，分别计算每一个导频组内两导频间的频域信道响应的差值； For each pilot received in the specified N radio subframes, the frequency domain channel response between the two pilots in each pilot group is calculated by using two adjacent pilots with the same frequency position in each of the two frequency domains. Difference

分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数。 The difference of the frequency domain channel response corresponding to each pilot group is separately subjected to modulo processing, and the frequency domain channel variation parameter is determined based on the modulo processing result.

5、如权利要求 4 所述的方法，其特征在于，分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数，包括： The method according to claim 4, wherein the difference of the frequency domain channel response corresponding to each pilot group is separately subjected to modulo processing, and the frequency domain channel variation parameter is determined based on the modulo processing result, including :

分别计算每一个导频组对应的频域信道响应的差值的模； Calculating, respectively, a modulus of a difference of a frequency domain channel response corresponding to each pilot group;

计算获得各导频组对应的频域信道响应的差值的模的平均值； Calculating an average value of a modulus obtained by obtaining a difference of a frequency domain channel response corresponding to each pilot group;

将所述平均值确定为所述频域信道变化参数。 The average value is determined as the frequency domain channel variation parameter.

6、如权利要求 4 所述的方法，其特征在于，分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数，包括： The method according to claim 4, wherein the difference of the frequency domain channel response corresponding to each pilot group is separately subjected to modulo processing, and the frequency domain channel variation parameter is determined based on the modulo processing result, including :

分别计算每一个导频组对应的频域信道响应的差值的模平方； Calculating, respectively, a modulus square of a difference of a frequency domain channel response corresponding to each pilot group;

计算获得各导频组对应的频域信道响应的差值的模平方的平均值； Calculating an average value of a modulus square of a difference obtained by obtaining a frequency domain channel response corresponding to each pilot group;

将所述平均值或者所述平均值的开方值，确定为所述频域信道变化参数。 The average value or the square root value of the average value is determined as the frequency domain channel variation parameter.

7、如权利要求 1 _ 6任一项所述的方法，其特征在于，根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取所述确定的频域信道变化参数对应的速度值，包括：获取唯一设置的频域信道变化参数和终端移动速度之间的映射关系，并根据该映射关系，获取所述确定的频域信道变化参数对应的速度值； The method according to any one of claims 1 to 6, wherein the determining the frequency domain channel variation parameter corresponding to the preset frequency domain channel variation parameter and the terminal moving speed The speed value includes: obtaining a mapping relationship between the uniquely set frequency domain channel variation parameter and the terminal moving speed, and according to the mapping And acquiring a speed value corresponding to the determined frequency domain channel variation parameter;

或者 Or

确定当前信道的信道状态参数，并获取对应所述信道状态参数设置的频域信道变化参数和终端移动速度之间的映射关系，以及根据该映射关系，获取所述确定的频域信道变化参数对应的速度值。 Determining a channel state parameter of the current channel, and obtaining a mapping relationship between the frequency domain channel variation parameter and the terminal moving speed corresponding to the channel state parameter setting, and acquiring the determined frequency domain channel variation parameter corresponding according to the mapping relationship Speed value.

8、如权利要求 7所述的方法，其特征在于，所述信道状态参数为信噪比 S R或 /和最大多径时延。 8. The method of claim 7, wherein the channel state parameter is a signal to noise ratio S R or / and a most majority of the time delay.

9、如权利要求 7 所述的方法，其特征在于，基于获得的速度值确定所述终端当前的移动速度，包括： The method of claim 7, wherein determining the current moving speed of the terminal based on the obtained speed value comprises:

直接将获得的速度值作为终端当前的移动速度； The obtained speed value is directly used as the current moving speed of the terminal;

或者 Or

对获得的速度值进行平滑处理，并将平滑处理结果作为终端当前的移动速度。 The obtained speed value is smoothed, and the smoothing result is taken as the current moving speed of the terminal.

10、如权利要求 7所述的方法，其特征在于，确定终端当前的移动速度后，根据该移动速度对所述指定时频范围内接收的非导频信号进行信道估计和信号检测。 10. The method according to claim 7, wherein after determining the current moving speed of the terminal, channel estimation and signal detection are performed on the received non-pilot signal in the specified time-frequency range according to the moving speed.

11、一种釆用导频测速的装置，其特征在于，包括： 11. A device for measuring pilot speed using a pilot, characterized in that it comprises:

第一处理单元，用于根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数； a first processing unit, configured to determine a corresponding frequency domain channel variation parameter according to a difference between frequency domain channel responses between pilots in a specified time domain range;

第二处理单元，用于根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取所述确定频域信道变化参数对应的速度值，并基于该速度值确定所述终端当前的移动速度。 a second processing unit, configured to acquire, according to a mapping relationship between a preset frequency domain channel variation parameter and a terminal moving speed, a speed value corresponding to the determined frequency domain channel variation parameter, and determine, according to the speed value, the terminal current The speed of movement.

12、如权利要求 11所述的装置，其特征在于，所述装置为基站或者终端。 12. The apparatus according to claim 11, wherein the apparatus is a base station or a terminal.

13、如权利要求 11所述的装置，其特征在于，所述通信单元获得各导频的频域信道响应后，在所述第一处理单元根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数之前，对各导频的频域信道响应进行抑噪处理。 The apparatus according to claim 11, wherein after the communication unit obtains a frequency domain channel response of each pilot, the first processing unit is configured according to a frequency domain between pilots within a specified time domain range. The difference of the channel responses is used to suppress the frequency domain channel response of each pilot before determining the corresponding frequency domain channel variation parameters.

14、如权利要求 11所述的装置，其特征在于，所述第一处理单元根据指定时域范围内的导频间的频域信道响应的差值，确定相应的频域信道变化参数时，针对在指定的 Ν个无线子帧内接收的各导频，以每两个频域位置相同的相邻导频为一组，分别计算每一个导频组内两导频间的频域信道响应的差值，以及分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数。 The apparatus according to claim 11, wherein the first processing unit determines a corresponding frequency domain channel variation parameter according to a difference between a frequency domain channel response between pilots in a specified time domain range, For each pilot received in the specified one of the wireless sub-frames, the frequency-domain channel response between the two pilots in each pilot group is calculated by taking each of the two adjacent pilot positions in the same frequency domain as a group. And a difference between the frequency domain channel responses corresponding to each pilot group, and determining the frequency domain channel variation parameters based on the modulo processing result.

15、如权利要求 14 所述的装置，其特征在于，所述第一处理单元分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数时，分别计算每一个导频组对应的频域信道响应的差值的模，并计算获得各导频组对应的频域信道响应的差值的模的平均值，以及将所述平均值确定为所述频域信道变化参数。 15. The apparatus according to claim 14, wherein the first processing unit separately uses each pilot The difference between the frequency domain channel response corresponding to the group is subjected to modulo processing, and when the frequency domain channel variation parameter is determined based on the modulo processing result, respectively, the modulus of the frequency domain channel response difference corresponding to each pilot group is calculated, and the calculation is performed. And obtaining an average value of a modulus of a difference of a frequency domain channel response corresponding to each pilot group, and determining the average value as the frequency domain channel variation parameter.

16、如权利要求 14 所述的装置，其特征在于，所述第一处理单元分别将每一个导频组对应的频域信道响应的差值进行模处理，并基于模处理结果确定所述频域信道变化参数时，分别计算每一个导频组对应的频域信道响应的差值的模平方，并计算获得各导频组对应的频域信道响应的差值的模平方的平均值，以及将所述平均值或者所述平均值的开方值，确定为所述频域信道变化参数。 The apparatus according to claim 14, wherein the first processing unit respectively performs modulo processing on a difference of a frequency domain channel response corresponding to each pilot group, and determines the frequency based on a modulo processing result. When the domain channel changes the parameters, respectively calculating a modulus square of the difference of the frequency domain channel responses corresponding to each pilot group, and calculating an average value of the modulus squares of the differences of the frequency domain channel responses corresponding to the respective pilot groups, and The average value or the square root value of the average value is determined as the frequency domain channel variation parameter.

17、如权利要求 11 _ 16任一项所述的装置，其特征在于，所述第二处理单元根据预设的频域信道变化参数和终端移动速度之间的映射关系，获取所述确定的频域信道变化参数对应的速度值时，获取唯一设置的频域信道变化参数和终端移动速度之间的映射关系，并根据该映射关系，获取所述确定的频域信道变化参数对应的速度值，或者，确定当前信道的信道状态参数，并获取对应所述信道状态参数设置的频域信道变化参数和终端移动速度之间的映射关系，以及根据该映射关系，获取所述确定的频域信道变化参数对应的速度值。 The device according to any one of claims 11 to 16, wherein the second processing unit acquires the determined according to a mapping relationship between a preset frequency domain channel variation parameter and a terminal moving speed. And obtaining a mapping relationship between the frequency domain channel change parameter and the terminal moving speed, and obtaining the speed value corresponding to the determined frequency domain channel change parameter according to the mapping relationship, when the speed value corresponding to the frequency domain channel change parameter is obtained. Or determining a channel state parameter of the current channel, and acquiring a mapping relationship between the frequency domain channel variation parameter and the terminal moving speed corresponding to the channel state parameter setting, and acquiring the determined frequency domain channel according to the mapping relationship The speed value corresponding to the change parameter.

18、如权利要求 17 所述的装置，其特征在于，所述第二处理单元确定的信道状态参数为信噪比 S R或 /和最大多径时延。 18. The apparatus according to claim 17, wherein the channel state parameter determined by the second processing unit is a signal to noise ratio S R or / and a maximum multipath delay.

19、如权利要求 17 所述的装置，其特征在于，所述第二处理单元基于获得的速度值确定所述终端当前的移动速度时，直接将获得的速度值作为终端当前的移动速度，或者，对获得的速度值进行平滑处理，并将平滑处理结果作为终端当前的移动速度。 The device according to claim 17, wherein when the second processing unit determines the current moving speed of the terminal based on the obtained speed value, the obtained speed value is directly used as the current moving speed of the terminal, or , smoothing the obtained velocity value, and using the smoothing result as the current moving speed of the terminal.

20、如权利要求 17所述的装置，其特征在于，进一步包括： The device of claim 17, further comprising:

第三处理单元，用于在所述第二处理单元确定终端当前的移动速度后， # ^据该移动速度对所述指定时频范围内接收的非导频信号进行信道估计和信号检测。 And a third processing unit, configured to: after the second processing unit determines the current moving speed of the terminal, perform channel estimation and signal detection on the non-pilot signal received in the specified time-frequency range according to the moving speed.