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Method and device for equalizing multi-channel signals

A multi-channel signal and equalization technology, applied in diversity/multi-antenna system, shaping network in transmitter/receiver, space transmit diversity, etc. problems such as limited improvement

Active Publication Date: 2013-01-16
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the combination technology can obtain better performance than that of a single antenna, but the cross-correlation information of the dual antennas is usually not used, and the performance improvement is limited; and the multi-antenna received signals are equalized separately, which is equivalent to the single-antenna received signal. With multiple equalizations, the complexity of the algorithm is high

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  • Method and device for equalizing multi-channel signals
  • Method and device for equalizing multi-channel signals
  • Method and device for equalizing multi-channel signals

Examples

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Embodiment 1

[0023] An embodiment of the present invention provides a method for multi-channel signal equalization, such as figure 1 As shown, the method includes:

[0024] Step 101, perform channel estimation according to at least one channel of received signals to obtain a channel impulse response, and determine a channel matrix;

[0025] Step 102, calculating and obtaining combining filter coefficients according to the second symbol value and the channel matrix;

[0026] Optionally, calculate a second symbol variance according to the second symbol value; calculate and obtain combining filter coefficients according to the channel matrix and the second symbol variance. It should be noted that, when performing the first iterative calculation, the initial value of the second symbol value is 0, and the initial value of the second symbol variance is 1. During the iterative calculation other than the first iterative calculation, the second symbol variance may be calculated according to the s...

Embodiment 2

[0045] An embodiment of the present invention provides a method for multi-channel signal equalization, the execution subject of the method is the signal receiving end, such as image 3 As shown, the method includes:

[0046] Step 301, performing channel estimation according to at least one received signal to obtain a channel impulse response;

[0047] At least one receiving antenna receives at least one corresponding receiving signal, for example, there are two receiving antennas, and corresponding receiving signals z1 and z2 are respectively obtained. Then, N times downsampling is performed on the received signals z1 and z2 respectively to obtain the processed data q1 and q2, and then according to the data q1 and q2 and the corresponding training sequence data, the correlation operation and the sliding search operation are performed to complete the synchronization processing and obtain Received signal data y corresponding to each burst 1、y 2 .

[0048] According to the re...

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Abstract

The invention discloses a method and device for equalizing multi-channel signals, belonging to the technical field of digital communication. The multi-channel signals can be equalized by using the cross-correlation information of multi-antennas so as to improve the performance and reduce the complexity. The channel estimation is carried out according to at least one received signal to obtain the channel impulse response and determine the channel matrix; the combined filter coefficient is obtained by calculation according to the second symbol value and the channel matrix; and at least one received signal are combined according to the combined filter coefficient to obtain the first symbol value sent by a sending terminal. The method and the device are used for obtaining sent signals by iteratively equalizing.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a method and device for equalizing multi-channel signals. Background technique [0002] In the wireless channel, due to the time-domain dispersion characteristics of the signal, the receiver simultaneously receives multiple multipath fading signals with different delays of the transmitted signal, and the multipath effect of the channel will cause inter-symbol interference, so the receiver needs to take certain measures Technology to overcome multipath fading to restore the original transmitted signal. [0003] In EDGE (Enhanced Data Rate for GSM Evolution, enhanced data rate GSM evolution technology; GSM, Global System of Mobile communication, Global System for Mobile Communications) / EEDGE (Enhanced EDGE, Enhanced EDGE) system, when multi-antenna reception, usually The equalizer is used to equalize the multi-channel signals separately, and then the equalized result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B7/08
Inventor 黄晓光付杰尉邓单
Owner COMBA TELECOM SYST CHINA LTD