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Method of raising accuracy estimation of received signal wave arrival direction

A technology for estimating the direction of arrival and receiving signals, applied in the field of reception, it can solve the problems of inaccurate direction of arrival estimation, influence of the accuracy of the estimation result, and large signal interference, so as to improve the accuracy, reduce the interference, and improve the performance. Effect

Inactive Publication Date: 2005-04-27
HUAWEI TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Since this method does not make good use of the time information of the received signal, it is easily affected by multipath signals arriving at different times when applied in a wireless communication system, resulting in inaccurate estimation of the direction of arrival.
Especially in narrowband wireless communication, the bandwidth limitation makes the signals of different propagation paths interfere with each other relatively large, which will have an extremely adverse impact on the accuracy of the estimation results

Method used

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  • Method of raising accuracy estimation of received signal wave arrival direction
  • Method of raising accuracy estimation of received signal wave arrival direction
  • Method of raising accuracy estimation of received signal wave arrival direction

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Embodiment Construction

[0027] Firstly, the principle on which the present invention is based will be described in detail.

[0028] The method of the invention is aimed at processing the baseband signals received by each array element of the antenna. Obtain channel estimates on each array element of a single user through pilot symbols, symbolized by h (n) (m) means, represent different array elements, Represents samples at different times.

[0029] For different antennas used, the method of the present invention also needs to do some different processing. Compared with the received signal of the linear antenna, the received signal of the loop antenna needs to be preprocessed as follows:

[0030] Assuming that the ring radius of the loop antenna is r, the carrier wavelength λ, and the arrival signal elevation angle θ∈[0, π / 2] are assumed to be known or estimated, let M be no greater than min{2πr / λ, N / 2} The largest integer of , min{a, b} represents the smaller number of a and b, ζ=2πrsinθ / λ, th...

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Abstract

The estimation method includes delay line transformation and spatial row transformation of antenna received signal matrix and delay and wave arrival direction estimation with the elements in transformed matrix with required amplitudes. Thus, some signal delay limitation is added in estimating the wave arrival direction, and the simultaneous estimation on signal delay and wave arrival direction can decrease the interference among signals with different delay and wave arrival direction and raise the accuracy in signal wave arrival direction estimation.

Description

technical field [0001] The invention relates to the receiving technology in the receiver of the wireless communication system, in particular to the direction of arrival (DOA) estimation technology of the received signal of the wireless communication system. Background technique [0002] The commonly used method for DOA estimation is to apply the FFT (Fast Fourier Transform) method to one snapshot sampling, or to use multiple snapshot sampling data for statistical signal processing to obtain the signal direction of arrival estimation. Because this method does not make good use of the time information of the received signal, it is easily affected by multipath signals arriving at different times when applied in a wireless communication system, resulting in inaccurate estimation of the direction of arrival. Especially in narrowband wireless communication, the bandwidth limitation makes the interference between signals of different propagation paths relatively large, which will c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/04H04B7/00
Inventor 周雷范涛
Owner HUAWEI TECH CO LTD