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Method for constructing pseudo-random code based on interleaver

A pseudo-random code and construction method technology, used in digital transmission systems, electrical components, error prevention and other directions, can solve the problems of limited number of code groups, poor code length flexibility, and high computational complexity in the construction process, achieving computational complexity. low effect

Active Publication Date: 2014-07-16
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] The purpose of the present invention is to propose a construction method based on an interleaver pseudo-random code in order to overcome the problems of poor code length flexibility, limited number of code groups, and high computational complexity in the construction process of the existing pseudo-random code construction method

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  • Method for constructing pseudo-random code based on interleaver
  • Method for constructing pseudo-random code based on interleaver
  • Method for constructing pseudo-random code based on interleaver

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Embodiment Construction

[0026] In order to better illustrate the purpose and advantages of the present invention, below in conjunction with the attached Figure 1-3 And embodiment technical scheme of the present invention is described further. In this specific implementation manner, the pseudo-random code parameters of the modernized public service signal of the GPS system of the United States will be used as an example for description.

[0027] The modern public service of the GPS system includes L5, L2C, and L1C signals of three different service types. Among them, the pseudo-random code of the L5 signal adopts a Gold sequence structure with a code length of 10230 bits. The L2C signal pseudo-random code adopts a truncated m sequence structure, and the L2CM code length is 10230 bits, the L2CL code length is 767250 bits, and the L1C signal is constructed using a number theory method with a code length of 10230 bits. Therefore, the code length of 10230 bits is selected as the target code length, that ...

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Abstract

The invention discloses a method for constructing a pseudo-random code based on an interleaver. According to the method, an interleaver technology and a pseudo-random code construction method in an error correcting code theory are effectively combined. According to the interleaver technology, a large pseudo-random code candidate set is constructed. The method overcomes the defects that an existing pseudo-random code construction method is poor in code length flexibility, limited in code set number, and high in computing complexity in the construction process.

Description

technical field [0001] The invention relates to a method for constructing a pseudo-random code based on an interleaver, and belongs to the technical field of pseudo-random code construction in digital communication. Background technique [0002] Spread spectrum communication technology is widely used in mobile communications, military communications and satellite navigation systems due to its advantages of large user capacity, strong anti-interference and anti-interception capabilities, and high time measurement accuracy. necessary condition. The requirements of spread spectrum communication on pseudo-random codes include: flexible and variable code lengths, adaptable to different information rates and chip rates; more spread spectrum codes to support more users sharing bandwidth; good code balance To reduce carrier leakage and improve anti-interference ability; sharp autocorrelation peak to improve anti-multipath performance; lower cross-correlation to reduce mutual interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 王珏王垚王晓玲罗显志董立桥何成龙崔淼杨昭
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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