Detection method for multi-antenna superimposing coding modulation system

A technology of superposition code modulation and detection method, which is applied in the direction of transmission system, digital transmission system, prevention/detection of errors through diversity reception, etc., can solve problems such as multi-antenna interference, and achieve the goal of solving the problem of amplifying noise and improving bit error rate performance Effect

Inactive Publication Date: 2012-12-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of inter-antenna interference in the multi-antenna superposition coding and modulation system, and propose a detection method for the multi-antenna superposition coding and modulation system

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  • Detection method for multi-antenna superimposing coding modulation system
  • Detection method for multi-antenna superimposing coding modulation system
  • Detection method for multi-antenna superimposing coding modulation system

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Embodiment Construction

[0021] Specific embodiments of the present invention will be given below in conjunction with the accompanying drawings.

[0022] The method of the present invention is set forth below by describing the transmitting process of the transmitter and the receiving process of the receiver, and the specific working principle is as follows: figure 1 , figure 2 and image 3 shown.

[0023] The transmitting process includes the following steps: (1) serial-to-parallel conversion; (2) superposition code modulation; (3) TX, that is, radio frequency transmission. The launching process is as follows:

[0024] First, the transmitted data is converted into serial and parallel, and divided into Nt sub-data streams, corresponding to Nt transmitting antennas. The data on each antenna is coded and modulated by superposition, and finally radio frequency is transmitted to form a transmission signal, and then transmitted. The transmitted signal on each transmitting antenna can be simply express...

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Abstract

The invention discloses a detection method for a multi-antenna superimposing coding modulation system, and the detection method comprises the following steps of decomposition detection, inter-antenna interference counteraction, likelihood ratio combined detection, judgment and iteration detection. The method utilizes a likelihood ratio combination scheme, the influence of noise on a signal is considered when the likelihood ratio of the signal is calculated, the Gaussian distribution characteristics of the noise are also utilized by adopting Gaussian approximation, the likelihood ratio represents the confidence level of the received signal, the superimposing of the confidence level only enables the useful signal to be accurate, no influence on the noise is produced, and the problem that the noise is amplified when combining conventional antennas can be effectively solved, so that the error-rate performance of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a detection method for a multi-antenna superposition coding modulation system. Background technique [0002] Superposition coded modulation (SCM, Superposition coded modulation) is a recently proposed improvement scheme to traditional coded modulation. Compared with coded modulation, the bit-to-symbol mapping of SCM is usually nonlinear, and the generation of symbols is realized by superimposing independent binary code sequences (each sequence is equivalent to one layer). By choosing appropriate weighting factors, the same binary encoder can be used on all layers, which simplifies the encoder selection. At the receiving end, the complexity of the detection algorithm using Gaussian approximation increases linearly with the number of layers, which reduces the complexity compared with traditional coded modulation. SCM has the advantages of higher flexibili...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04W24/04H04L1/00H04L1/06
Inventor 赵鹏桥肖悦叶敏严培李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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