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Method and system of channel blind equalization in MIMO system

A multi-output, blind equalization technology, applied in transmission systems, digital transmission systems, diversity/multi-antenna systems, etc., can solve problems such as bit error rate performance degradation, achieve the effect of reducing complexity and improving bit error rate performance

Inactive Publication Date: 2008-07-30
FUDAN UNIV +1
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Problems solved by technology

In this method, when the receiving end resumes sending the data signal, the colored random signal superimposed on the sending end interferes with the data signal, so that the bit error rate performance of the system decreases

Method used

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  • Method and system of channel blind equalization in MIMO system
  • Method and system of channel blind equalization in MIMO system
  • Method and system of channel blind equalization in MIMO system

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, specific examples are given below to further describe the present invention in detail.

[0024] figure 1 It is a schematic flow chart of implementing blind equalization in the embodiment of the present invention, including the following steps.

[0025] Step 101: The transmitting end adds a prefix to the data signal on each transmitting antenna to obtain the transmitting signal, and the prefix makes the autocorrelation function of the transmitting signal on each transmitting antenna satisfy the autocorrelation independence condition.

[0026] Here, the prefix includes a part of the original data signal, which is called a cyclic prefix. The use of the cyclic prefix ensures that the autocorrelation function of each transmitted signal obtained after adding the prefix will also have a peak value at a position not equal to zero. In addition, the prefixes added to each transmitted...

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Abstract

The invention discloses a channel blind equalization method in a multi-input multi-output system, the method comprises that: the transmitting ends respectively add prefixes in the data signals on all the transmitting antennas, so as to obtain the transmitting signals of a self-related function which meet the self-related independent conditions and transmit; the receiving ends of all the receiving antennas receive the transmitting signals and carry out the channel blind equalization which is based on the self-related matching principles. The invention further discloses a system for realizing the channel blind equalization. The system complexity for realizing the channel blind equalization can be reduced and the error bit rate performances of the system can be improved according to the method.

Description

technical field [0001] The present invention relates to an equalization technology, in particular to a channel blind equalization method and system in a multiple-input multiple-output (MIMO) system. Background technique [0002] In a MIMO system, when the data sent by the transmitting end is transmitted to the receiving end through a wireless channel, the receiving end needs to eliminate the interference caused by the wireless channel through equalization in order to obtain an estimated value of the transmitted signal. [0003] Equalization techniques in wireless communication systems are mainly divided into equalization using training sequences and blind equalization without training sequences. The former needs to estimate the coefficients of the equalizer using a training sequence known to both the sending end and the receiving end, while the latter directly estimates the coefficients of the equalizer without using the training sequence. Blind equalization does not use tr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/14H04L27/00H04B7/02
Inventor 刘琦郭心悦吴震宇胡波王吉滨魏波
Owner FUDAN UNIV
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