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Nonlinear pseudorandom sequence generator

A pseudo-random sequence and non-linear technology, applied in the field of pseudo-random sequence generation, can solve the problems of increasing the complexity and loss of pseudo-random sequences

Inactive Publication Date: 2015-06-24
ANHUI UNIVERSITY OF ARCHITECTURE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This generation method improves some characteristics of the sequence, but at the same time loses some original advantages, and increases the complexity of pseudo-random sequence generation

Method used

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Embodiment Construction

[0035] In order to make the purpose, method, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] figure 1 It is a logical structure diagram of a nonlinear pseudo-random sequence generator provided by an embodiment of the present invention. The nonlinear pseudo-random sequence generator is a nonlinear m-subsequence generator based on an m-sequence shift register, which includes a shift register unit and a feedback logic unit.

[0037] Wherein, the m-sequence shift register is an m-sequence shift register with a primitive trinomial feedback function, the input of the shift register unit is coupled to the output of the feedback logic circuit, and the state output of the shift register is coupled...

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Abstract

The invention provides a nonlinear pseudorandom sequence generator, comprising a shift register unit and a feedback logic unit. The feedback logic unit comprises a linear feedback logic unit, a nonlinear feedback logic unit and a synthetic unit. The input end of the linear feedback logic unit is correspondingly connected with the state output end of the shift register unit according to own primitive trinomial feedback function, while the output end thereof is connected with one input end of the synthetic unit; the input end of the nonlinear feedback logic unit is correspondingly connected with the state output end of the shift register unit according to own nonlinear characteristic function, while the output end thereof is connected with another input end of the synthetic unit; and the synthetic unit comprises an exclusive-OR gate, the input end of the synthetic unit is respectively connected with the output end of the linear feedback logic unit and the output end of the nonlinear feedback logic unit, and the output end of the synthetic unit is connected with the input end of the shift register. The pseudorandom sequence generated by the generator has high linear complexity and long cycle, and the generation method is simple.

Description

technical field [0001] The present invention relates to pseudo-random sequence generation technology, in particular to a nonlinear pseudo-random sequence generator Background technique [0002] The m-sequence is a pseudo-random sequence generated by the Maximum-length linear feed back shift register (MLLFSR). It has good periodic characteristics, balance characteristics, run length characteristics, and autocorrelation characteristics. It has a wide range of applications in many important fields such as communication, radar, testing, and navigation. [0003] However, the number of m-sequences is limited, and it is difficult to meet the massive address codes required by the communication system; its linear complexity is low, and it is difficult to resist the attack of the enemy in information encryption. [0004] In practical applications, in order to obtain a pseudo-random sequence with a long period and high complexity, it is often necessary to perform operations such as tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/58
Inventor 吕虹朱达荣汪小龙陈蕴方俊初张爱雪戚鹏常伟
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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