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Blind detection method for differential space-time coding signals

A technology of space-time coding and blind detection, applied in the field of electricity

Active Publication Date: 2014-08-06
SHENYANG LIGONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the blind detection problem of MIMO differential space-time coding signal under the condition of no prior knowledge, and propose a blind detection method of differential space-time coding signal

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  • Blind detection method for differential space-time coding signals
  • Blind detection method for differential space-time coding signals

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Embodiment

[0089] Take the differential space-time coded signal using 2 transmitting antennas and the modulation mode QAM as an example. Assume that there are two other signal components, namely the pulse signal and the Gaussian signal, the incident angles of the four signal components arriving at the receiving antenna elements are 25°, 25.1°, 50° and 65°, the number of receiving antenna elements is 8, and the processing The number of data points is 5000 points. Set of Differential Space-Time Coding Matrices V ={ V 0 , V 1 ,…, V 7},in, V 0 ={1 0;0 1}, V 2 ={i 0 ;0-i}, V 4 ={0 –i;i 0}, V 6 ={0 1;-1 0}, V 1 =- V 0 , V 3 =- V 2 , V 5 =- V 4 , V 7 =- V 6 , D ={1 -1;1 1}, loss-overlap mode, the first 7 bits of transmission data are 5, 2, 1, 6, 3, 0, 1, 7.

[0090] Input Mixed Signal After signal separation algorithm processing, the signal components transmitted by each antenna element are obtained . The time-domain waveforms of each signal component and...

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Abstract

The invention relates to a blind detection method for differential space-time coding signals. The method includes the process that the input differential space-time coding signals are separated via a JADE method to obtain signal components transmitted by antenna array elements, each signal component is processed via a modulation mode recognition algorithm to recognize a modulation mode, the signal components with the same frequency band and the same modulation mode are extracted, the extracted signal components are detected by the aid of a differential space-time coding signal detection method to recognize differential space-time coding signals, the differential space-time coding signals with continuous time span are selected to perform statistical analysis so as to realize effective evaluation of a differential space-time coding matrix. By the method, the JADE algorithm, the modulation mode recognition algorithm and the differential space-time coding signal recognition algorithm are combined for the first time, and differential space-time coding signal recognition and differential space-time coding matrix evaluation under the condition of no priori knowledge is realized.

Description

technical field [0001] The invention belongs to the field of electrical technology, and in particular relates to a blind detection method for differential space-time coded signals specialized in electrical communication technology. Background technique [0002] MIMO technology uses multiple transceiver antennas, which can effectively resist channel fading, improve channel capacity and data transmission reliability, and is the core technology in 4G communication. MIMO technology needs to use space-time coding technology to convert the transmission data stream into multiple transmission signals. Space-time coding technology is an organic combination of coding technology and multi-element antenna array technology. It can obtain higher diversity gain without sacrificing bandwidth, and improve the system's ability to resist interference and noise. There are many ways of space-time coding. Most of the decoding methods of space-time coding need to obtain channel state parameters, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L25/03
Inventor 冯永新钱博隋涛
Owner SHENYANG LIGONG UNIV
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