Method and device for generating multi-value pseudorandom sequence

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

Inactive Publication Date: 2012-01-18
XIDIAN UNIV
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  • Abstract
  • 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 with reference to the accompanying drawings.

[0029] Refer to the attached figure 1 , to further describe the multi-valued pseudo-random sequence generation method of the present invention. In order to help understand the present invention, in the following description, three pseudo-random sequences of different lengths are used to generate a multi-valued pseudo-random sequence of length 1024 as the present invention. example.

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

[0031] The shift register is used to generate binary pseudo-random sequences composed of +1 and -1 of different lengths, and there are at least two pseudo-random sequences. In the embodiment of the present invention, an 8-stage shift register, a 6-stage shift register, and a 5-stage shift register are respectively used to generate pseudo-random sequences pn with lengths of 256, 64, and 32. 1 , pn 2 , pn 3 .

[0032] Step 2, expand the ...

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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 pseudorandom sequence in the field of spreading and despreading of communication system signals. The invention can be used for the spreading of the signal at the transmitting end and the despreading of the signal at the receiving end in the spread spectrum communication system, so as to realize the arbitrary site selection of the system, and enhance the anti-interference and confidentiality. Background technique [0002] In the spread spectrum communication system, the expansion of the signal spectrum is realized by 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, a pseudo-random or pseudo-noise (PN) sequence is often used as a spreading sequence. The quality of the pseud...

Claims

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Application Information

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Patent Type & Authority Applications(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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