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Navigation signal pseudo code construction method

A technology of navigation signal and construction method, which is applied in the field of construction of navigation signal pseudocode, to achieve the effect of excellent cross-correlation performance, easy capture, and stable tracking

Pending Publication Date: 2021-11-02
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for constructing a navigation signal pseudo-code, aiming to solve the contradiction between cross-correlation performance and capture complexity in pseudo-code design

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  • Navigation signal pseudo code construction method
  • Navigation signal pseudo code construction method
  • Navigation signal pseudo code construction method

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Embodiment Construction

[0031] In order to make the object, 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 and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] The present invention provides a navigation signal pseudo-code construction method, based on a composite pseudo-code sequence constructed by any pseudo-code sequence, a pseudo-code sequence c with a code length of L is defined 0 , then the pseudocode of the navigation signal with length NL is:

[0033]

[0034] in, represented by the pseudocode sequence c 0 cyclically shifted by k ...

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Abstract

The invention discloses a navigation signal pseudo code construction method, the navigation signal pseudo code is a composite pseudo code sequence constructed based on any pseudo code sequence, the cyclic shift of a basic pseudo code sequence is realized by controlling the initial phase of the basic pseudo code sequence, and the basic pseudo code sequence after cyclic shift is sequentially spliced to obtain a final navigation signal pseudo code. The self-correlation performance of the navigation signal pseudo code provided by the invention is close to the random code self-correlation performance, the self-correlation performance is far better than that of a layered code, and the false capture probability is low; the navigation signal pseudo code has capture complexity equivalent to that of the layered code and far lower than that of a random code with the same length, and capture is easier; compared with the layered code, the navigation signal pseudo code has the advantages of better cross-correlation performance, high code isolation, excellent multi-access interference resistance and capability of keeping stable tracking.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation signal system design, and more specifically relates to a method for constructing a navigation signal pseudo-code. Background technique [0002] Modern satellite navigation systems adopt the spread spectrum system without exception, and the performance of the pseudo-code has a significant impact on its anti-narrowband interference and anti-multiple access interference capabilities. The code length is the primary factor affecting the performance of the pseudo-code, but there is a common contradiction in the design of the pseudo-code: the longer the code length, the better the autocorrelation and cross-correlation performance of the pseudo-code, but at the same time it will inevitably increase the difficulty of capturing the pseudo-code ; The shorter the code length, the easier it is to quickly capture, but the worse the correlation performance is, it is not conducive to the improvement ...

Claims

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Application Information

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IPC IPC(8): G01S19/24G01S19/30
CPCG01S19/24G01S19/30
Inventor 魏蛟龙唐祖平叶斌杨明孙捷史师帅夏景园
Owner HUAZHONG UNIV OF SCI & TECH
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