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Method and device for generating multi-value pseudorandom sequence

A pseudo-random sequence and value sequence technology, applied in the field of multi-value pseudo-random sequence generation methods and devices, can solve the problems of insufficient number of binary sequences, weak anti-detection ability, poor security, etc., and increase the number of system users. , the effect of high security and strong anti-detection ability

Inactive Publication Date: 2014-07-23
XIDIAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method and device capable of generating a multi-valued pseudo-random sequence with better pseudo-random characteristics, so as to solve the problem of insufficient number of binary sequences, weak anti-detection ability, and security. bad sex problem

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  • Method and device for generating multi-value pseudorandom sequence
  • Method and device for generating multi-value pseudorandom sequence
  • Method and device for generating multi-value pseudorandom sequence

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Refer to attached figure 1 , further describe the multi-value pseudo-random sequence generation method of the present invention, in order to help understand the present invention, in the following description, use 3 pseudo-random sequences of different lengths to generate a multi-valued pseudo-random sequence with a length of 1024 as the present invention the embodiment.

[0030] Step 1, generate a pseudo-random sequence

[0031] A shift register is used to generate binary pseudo-random sequences of different lengths consisting of +1 and -1, and the pseudo-random sequences are at least two. Embodiments of the present invention adopt 8-stage shift registers, 6-stage shift registers and 5-stage shift registers to generate pseudo-random sequences pn with lengths of 256, 64, and 32 respectively. 1 、pn 2 、pn 3 .

[0032] Step 2, extended pseudo-random sequence ...

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Abstract

The invention discloses a method and device for generating a multi-value pseudorandom sequence, and mainly solves the problems of small number of the existing spread spectrum sequence, weak detection resistance and poor security. The method comprises the following steps of: generating a plurality of pseudorandom sequences with different lengths; expanding the pseudorandom sequences to be of the same length, and shifting randomly; summing corresponding digits of the shifted sequences; performing related summation to the shifted sequences and the expandability intercepted sequences after summation; and selecting a sequence with minimum time sidelobe value from the related summation value. The device comprises a binary pseudorandom sequence generator, a zero-interpolation shifting register, a summator, a correlator and a selector. The device has the advantages of large number of code families, strong detection resistance and high security.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method and a device for generating a multi-valued pseudo-random sequence in the field of frequency spreading and despreading of communication system signals. The invention can be used for frequency spreading of sending end signal and despreading of receiving end signal in spread spectrum communication system, realizes arbitrary site selection of the system, enhances anti-interference performance and confidentiality. Background technique [0002] In the spread spectrum communication system, the expansion of the signal spectrum is realized through the spread spectrum sequence, and the performance of the spread spectrum system has a great relationship with the performance of the spread spectrum sequence. In the actual communication process, pseudo-random or pseudo-noise (PN) sequences are commonly used as spreading sequences. The quality of the spread spectrum sequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/10
Inventor 王勇超易克初胡凤薛瑄李文杰何伟
Owner XIDIAN UNIV
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