Space-time-code mode blind identification method based on partial sequence parameter detection

A parameter detection and space-time code technology, applied in the field of communication, can solve the problems of indistinguishable code patterns, increased computational complexity, and inability to identify encoding modes.

Inactive Publication Date: 2014-01-01
XIDIAN UNIV
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Problems solved by technology

However, when this method is used for MIMO detection in engineering practice, there is a shortcoming: it cannot recognize a variety of coding modes with the same packet length and the number of symbols in each packet
However, this method still has many deficiencies in the MIMO blind recognition system: it is mainly manifested in the inability to distinguish multiple patterns with the same F-norm solution, and the computational complexity increases geometrically with the sampling time length

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  • Space-time-code mode blind identification method based on partial sequence parameter detection
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  • Space-time-code mode blind identification method based on partial sequence parameter detection

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Embodiment Construction

[0049] refer to figure 1 , the system used in the present invention includes: t transmitting antennas, r receiving antennas, and the modulation mode is 4QAM. At the transmitter, the serial transmission sequence is converted into a parallel transmission sequence after space-time coding, and then the parallel sequence is modulated and sent out. At the receiving end, the received signal matrix is ​​R': R'=HX+B, where t≥2, r>t, H is a channel matrix with independent elements that obey the complex Gaussian distribution, X is the transmitted information sequence, and B is Gaussian white noise matrix, t=3 in this example.

[0050] The present invention blindly recognizes the space-time coding mode used by the sending end according to the received signal matrix R'.

[0051] refer to figure 2 , the specific implementation steps of the present invention are as follows:

[0052] Step 1. The receiving end receives the signal sequence of length N sent by the transmitting end through r...

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Abstract

The invention discloses a space-time-code mode blind identification method based on partial sequence parameter detection. The method mainly solves the problems that in the prior art, calculation complexity is high and the code pattern identification range is narrow. The method includes the steps of (1) extracting a code pattern set to obtain a characteristic quantity set, (2) calculating a parallel-connection matrix and calculating a characteristic quantity function value vector by means of the matrix, (3) pre-estimating a characteristic quantity by means of the characteristic quantity function value vector to obtain a new space-time-code set, (4) writing symbolic number vectors of code patterns in the new space-time-code set, (5) solving a parameter estimation vector, (6) solving a distance decision value vector by means of the step (4) and the step (5), and (7) taking the code pattern corresponding to a minimum element in the distance decision value vector as a decision code pattern. The method overcomes the defect that in the prior art, due to the fact that time-lag relative field norms are intensive in computation, system complexity is high, increases the identification range of an exiting space-time-code blind identification method and can be used for space-time-code mode identification in communication countermeasure.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a space-time block code coding mode blind recognition method in the field of space-time signal detection technology, which can be used in a multiple-input multiple-output MIMO system for blind recognition of space-time block codes. Background technique [0002] MIMO system is the key technology of next-generation wireless communication, and space-time code is an important part of MIMO system. The blind recognition of space-time codes is an urgent research area in the field of communication countermeasures. It can provide the basis and technical support for MIMO system countermeasures, has important theoretical significance and application value, and has attracted the attention of the academic community. [0003] Blind recognition of space-time codes is an emerging topic, and the existing algorithms are divided into maximum likelihood detection algorithm and time-delay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
Inventor 卢小峰张海林程文驰董阳郭松张立
Owner XIDIAN UNIV
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