窄带干扰及动态环境BOC调制信号多通道并行捕获

doi:10.12305/j.issn.1001-506X.2023.04.32

Abstract

Abstract:

Aiming at the problems of difficult acquisition and low acquisition efficiency of narrowband interference and binary offset carrier (BOC) modulated signals in dynamic environments, singular value decomposition (SVD) combined with minimum description length (MDL) craterion to suppress narrowband interference is proposed. Based on the partially matched filter-fractional Fourier transform (PMF-FRFT) acquisition algorithm, a multi-channel parallel acquisition algorithm combining pseudo-code composite and asynchronous pseudo-code correlation accumulation is proposed. The proposed algorithm firstly performs SVD on the received narrowband interference signals, and uses the MDL criterion to adaptively estimate the number of interference signals and complete the interference suppression. Secondly, the signal pseudo-codes are added to form a new pseudo-code sequence, and multiple signals are accurately captured by PMF-FRFT combined with the asynchronous pseudo-code correlation accumulation algorithm. The simulation results show that the SVD narrowband interference suppression algorithm can effectively suppress the interference signal on the basis of better preserving the original signal characteristics, and the performance is stable. The proposed pseudo-code composite combined with the asynchronous pseudo-code correlation-accumulation multi-channel acquisition algorithm can complete the acquisition of multiple signals at the same time, with the effectively improvement of the signal acquisition probability and reduction of the acquisition time.

Key words: narrowband interference, singular value decomposition (SVD), minimum description length (MDL) criterion, pseudo code composite, asynchronous pseudocode correlation accumulation, multi-channel

CLC Number:

TN967.1

Tianqi ZHANG, Zhu FANG, Rui WANG, Xueyi WANG. Multi-channel parallel acquisition of BOC modulation signals in narrowband interference and dynamic environment[J]. Systems Engineering and Electronics, 2023, 45(4): 1222-1230.

Figures/Tables 11

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Multi-channel parallel acquisition of BOC modulation signals in narrowband interference and dynamic environment

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