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A Chaotic Spread Spectrum Sequence Generation Method Based on Dynamic Multi-map Recombination

A technology of spread spectrum sequence and generation method, which is applied in the field of chaotic spread spectrum sequence generation based on dynamic multi-mapping compounding, and can solve problems such as the performance impact of chaotic sequences

Active Publication Date: 2022-05-20
SHENYANG LIGONG UNIV
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AI Technical Summary

Problems solved by technology

However, as the system spread spectrum address code is a finite length sequence, the performance of the infinitely long chaotic sequence will be affected to a certain extent, so how to generate an effective finite length chaotic spread spectrum sequence has become the focus

Method used

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  • A Chaotic Spread Spectrum Sequence Generation Method Based on Dynamic Multi-map Recombination
  • A Chaotic Spread Spectrum Sequence Generation Method Based on Dynamic Multi-map Recombination
  • A Chaotic Spread Spectrum Sequence Generation Method Based on Dynamic Multi-map Recombination

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Embodiment Construction

[0010] 1) Pass input parameters, namely: control parameter k, initial value parameter z 1 and x 1 , the fractal parameter α. Among them, the initial value parameter z 1 The value range is (0,1), the initial value parameter x 1 The value range of is (-1,1). The value range of the fractal parameter α is (0,1). The value of the control parameter k is 0 or 1, which mainly controls the matching of odd and even maps from the set of Chebyshev maps and improved Logistic maps. When k=0, the Chebyshev maps are odd maps, and the improved Logistic maps are even maps. When k=1, the improved Logistic map is an odd map, and the Chebyshev map is an even map.

[0011] 2) According to the analysis of the input parameters, the fractal parameter α of the Kent map is obtained. Since the Kent map presents the best chaotic form when α=0.4997, the trigger fractal parameter α is set to 0.4997 when the system starts. (i.e. when n=1), Kent mapping initial value z 1 Input by the user, the initial ...

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Abstract

The generation method of chaotic spread spectrum sequence based on dynamic multi-mapping composite, to cope with the limitation of the limited number of sequences and the fixed mechanism of chaotic communication, this method is proposed based on the research basis of the improved Logistic, Chebyshev, and Kent three mappings. Use the control parameters to select the odd map and the even map from the improved Logistic, Chebyshev, and use the Kent map to establish a fractal function, thereby driving the fractal parameters of the odd map and the even map, and then the output of the odd map drives the initial value of the even map, and the even map The output of drives the initial value of the odd map. The selection function is established through the association of the odd map and the even map, and drives the initial value of the Kent map. Thus, the final new sequence is output through the optimization function of odd and even maps. This method can provide more address codes for the spread spectrum communication system, thereby expanding the application of the communication system.

Description

technical field [0001] The invention relates to the technical fields of spread spectrum communication and chaotic communication, in particular to a method for generating a chaotic spread spectrum sequence based on dynamic multi-mapping compounding (a preferred method for generating a chaotic spread spectrum sequence). Background technique [0002] The generation trajectory of chaotic signals is very complex and has no rules to find, which makes it have a good concealment effect and a high degree of unpredictability. The generation of chaotic signals depends on the system iteration equation and the initial value and fractal parameters, which is beneficial to the replication and regeneration of the signal. The signal itself is not random, but it has a similar random performance, and has a similar pseudo-random spreading code to the traditional pseudo-random The nature of randomness solves the problem of limited number of traditional spread spectrum address codes. In addition ...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04B1/69
CPCH04L9/001H04B1/69Y02D30/70
Inventor 刘芳冯永新
Owner SHENYANG LIGONG UNIV
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