基于非等量采样的伪码同步技术研究

doi:10.12305/j.issn.1001-506X.2022.04.39

Abstract

Abstract:

Aiming at the problem that the synchronization accuracy of the pseudo-random noise (PN) code synchronization technology in digital communication systems is limited by the sampling interval, combined with the high-precision synchronization idea of variable group delay and the change in the position offset of the sampling point, the analytic expression of the PN correlation function under non-commensurate sampling (NCS) is presented, and the selection criterion of NCS rate based on the precision factor is proposed, the lower limit of PN code synchronization accuracy processed by NCS can be quickly determined by the precision factor. On this basis, the influence of the code sequence period, the receiver front-end filter and other additional factors on PN code synchronization accuracy is analyzed. The research on the selection criteria of the NCS rate provides theoretical guidance for optimizing the design of digital communication systems, and achieves the purpose of high-precision synchronization with low hardware consumption.

Key words: non-commensurate sampling, offset cycle, precision factor

CLC Number:

TN911

Bo HUA, Zhongyang MAO, Jiafang KANG, Xiguo LIU, Jingyi WEI. Research on pseudo-random noise code synchronization technology based on non-commensurate sampling[J]. Systems Engineering and Electronics, 2022, 44(4): 1401-1408.

Figures/Tables 8

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References 30

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Research on pseudo-random noise code synchronization technology based on non-commensurate sampling

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