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Matrix encoding GA (Genetic Algorithm) based PN (Pseudo Noise) code estimation method of DS/SS (Direct Sequence/Spread Spectrum) signals

A technology for matrix coding and coding signals, applied in the field of communication systems, can solve problems such as low estimation accuracy of PN codes, and achieve the effects of overcoming low estimation accuracy, good search efficiency, and flexible methods

Active Publication Date: 2013-11-06
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0053] The technical problem to be solved by the present invention is to use a new matrix-based Encoding GA estimates the PN code to avoid falling into the local optimum, so as to obtain the global optimal solution and improve the estimation accuracy and efficiency

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  • Matrix encoding GA (Genetic Algorithm) based PN (Pseudo Noise) code estimation method of DS/SS (Direct Sequence/Spread Spectrum) signals
  • Matrix encoding GA (Genetic Algorithm) based PN (Pseudo Noise) code estimation method of DS/SS (Direct Sequence/Spread Spectrum) signals
  • Matrix encoding GA (Genetic Algorithm) based PN (Pseudo Noise) code estimation method of DS/SS (Direct Sequence/Spread Spectrum) signals

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Embodiment Construction

[0068] The maximum likelihood estimation of PN codes for DS / SS signals is a combinatorial optimization, a high-dimensional, nonlinear, complex function optimization problem, while the matrix coding method is a solution to high-dimensional, multi-peak, non-linear It is a very good method for linear, non-convex or even function optimization problems without mathematical models, especially when dealing with large-scale complex problems, high-dimensional numerical optimization problems or multi-objective optimization problems with a large number of sub-objectives, its efficiency can be better. reflect. And because the two-dimensional data structure of the matrix can enjoy a larger representation space than the one-dimensional data structure, the chromosomes encoded by the matrix are more flexible and diverse in the way of breeding new individuals, and at the same time, the algorithm has a better performance. search efficiency.

[0069] Now in conjunction with the accompanying dra...

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Abstract

The invention belongs to the technical field of communication and particularly discloses a matrix encoding GA (Genetic Algorithm) based PN (Pseudo Noise) code estimation method of a DS / SS (Direct Sequence / Spread Spectrum) signals in a DS / SS communication system. In the invention, a novel matrix encoding GA based PN code estimation method of the DS / SS signals by using matrix encoding for improving a basic GA. Besides the advantage of improving the estimating efficiency of PN codes of the DS / SS signals, more importantly, the method is favorable for improving the estimating accuracy of the PN codes of the DS / SS signals. Moreover, the method has no any prior knowledge requirements on the properties (such as the structures, the linear complexity and the like) of the PN codes, and only needs the periods of the PN codes. Therefore, the method has application prospects in many fields of wireless management, military communication investigation, interception, (relevant) interference and the like.

Description

technical field [0001] The invention relates to the field of communication systems, in particular to a method for estimating PN (pseudo-noise) codes of DS / SS (direct sequence spread spectrum) signals based on matrix coding GA (genetic algorithm) in the communication system. Background technique [0002] At present, under the condition of low signal-to-noise ratio, on the premise that the PN code period, chip rate, carrier and other parameters of the DS / SS signal have been estimated, there are characteristic analysis method, neural network method, maximum algorithm for PN code sequence estimation algorithm. Likelihood Estimation etc. [0003] Literature (Xiao Xianci. Application of Computational Intelligence Method in Non-cooperative Signal Parameter Estimation [J]. Chengdu: University of Electronic Science and Technology of China, 2005.) Introduce maximum likelihood estimation into PN code estimation of DS / SS signal, The maximum likelihood model of PN code estimation for DS...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7073H04J13/00
Inventor 张天骐赵德芳代少升蒋清平蒋世文侯瑞玲金翔高永升
Owner CHONGQING UNIV OF POSTS & TELECOMM
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