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Decoding method and device of mimo system

A decoding and modulus technology, which is applied in the field of decoding methods and devices of MIMO systems, can solve the problems of high complexity of decoding methods

Inactive Publication Date: 2017-03-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a decoding method and device for a MIMO system, so as to optimize the problem that the complexity of the existing decoding method is too high

Method used

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  • Decoding method and device of mimo system
  • Decoding method and device of mimo system
  • Decoding method and device of mimo system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] In Embodiment 1, this step specifically includes:

[0093] Step S10: Calculating the channel response h of the above another transmitting terminal 2 The module ||h 2 || 2 and save;

[0094] Step S11: Calculate the channel response h of the other transmitting terminal above 2 The conjugate transpose of h 2 H and save;

[0095] Step S12: Calculate the above h 2 H The product A with the modulation symbol r received by the above system is saved, that is

[0096] A=h 2 H r

[0097] Step S13: Calculate the above h 2 H and the channel response h of the current transmitting terminal above 1 The product B of and saved; ie

[0098] B=h 2 H h 1

[0099] Step S14: According to the channel response h of the above another transmitting terminal 2 The module ||h 2 || 2 , the above h 2 H , and the above A and B, the modulation symbol s transmitted by the above current transmitting terminal is calculated by the following formula 1 Modulation symbol s transmitted ...

Embodiment 2

[0104] In Embodiment 2, this step specifically includes:

[0105] Step S10': Calculate the channel response h of the above-mentioned another transmitting terminal 2 The conjugate transpose of h 2 H and save;

[0106] Step S11': Calculate the above h 2 H and save the product A of the modulation symbol r received by the above system;

[0107] Step S12': Calculate the above h 2 H and the channel response h of the current transmitting terminal above 1 The product B of and save;

[0108] Step S13': According to the above h 2 H With A and B, the modulation symbol s transmitted by the current transmitting terminal is calculated by the following formula 1 Modulation symbol s transmitted at another transmitting terminal 2 projection on

[0109]

[0110] Among them, h 2 Indicates the channel response of the other transmitting terminal above, h 2 H means h 2 The conjugate transposition of .

[0111] Embodiment 2 Compared with Embodiment 1, for different modulation ...

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Abstract

The present invention relates to a decoding method and device of an MIMO system. The method comprises: calculating, according to a modulation symbol r received by a system, a projection s~2 of a modulation symbol s1 transmitted by a current transmitting terminal on a modulation symbol s2 transmitted by another transmitting terminal; performing quantitative estimation on a real part s~2,I and an imaginary part s~2,Q of the s~2, to obtain estimated values s2,I and s2,Q of the real part s~2,I and the imaginary part s~2,Q of the s~2; performing constellation mapping on the s2,I and s2,Q to obtain a position of the s2 in a constellation graph; calculating, according to the position of the s2 , an error D of an estimated value and an actual value of the s1 ; updating, according to the D, minimum errors min_dist_0[k] and min_dist_1[k] between the estimated value and the actual value of the s1 ; and calculating, according to the min_dist_0[k] and min_dist_1[k], a log likelihood ratio of each bit of the s1 to obtain a decoding result. The decoding complexity of the present invention is low.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a decoding method and device for a MIMO (Multiple-Input Multiple-Out-put, Multiple-Input Multiple-Output) system. Background technique [0002] Multi-antenna transmission technology plays a vital role in improving the capacity and reliability of wireless communication systems, and the distributed access method is also a hot spot in the research of high-speed packet transmission. The transmission signal is sent and received by multiple antennas at the same time, and the wireless channel between the sending end and the receiving end is changed from the traditional SISO (Single-InputSingle-Out-put) system to the MIMO system, and the communication system has Space resources other than traditional time, frequency, and code channel resources are eliminated. Theoretical research shows that a MIMO channel is a superposition of multiple SISO channels, and its capacity and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04L25/03891
Inventor 李希
Owner ZTE CORP
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