Blind estimation of pseudo-code sequence of soft spread spectrum signal with residual frequency offset

被引：0
作者：
Zhang, Tianqi [1 ]
Zhang, Huizhi [1 ]
Luo, Qingyu [1 ]
Fang, Rong [1 ]
机构：
[1] School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2024年 / 46卷 / 10期
关键词：
blind estimation; digital phase locked loop (DPLL); residual frequency offset; singular value decomposition (SVD); soft spread spectrum signal;
D O I：
10.12305/j.issn.1001-506X.2024.10.35
中图分类号：
学科分类号：
摘要：
Aiming at the difficulty of blind estimation of pseudo-code sequence of soft spread spectrum signals with residual frequency offset, a singular value decomposition (SVD) combined with digital phase locked loop (DPLL) method is proposed. The data matrix is generated through non-overlapping segments of the signal to be processed, and the length of each segment is a single pseudo-code period. Then, the element in the upper right corner of the autocorrelation matrix is used to estimate the out-of-step point for synchronization, and the autocorrelation matrix is recalculated to estimate the base number according to the number of large eigenvalues. Finally, the blind estimation of pseudo-code sequence is finally realized by combining multiple fast SVD algorithms with DPLL. The simulation results show that the proposed method can effectively estimate the pseudo-code sequence of the soft spread spectrum signal with residual frequency offset under low signal-to-noise ratio (SNR), and the performance of the proposed method is better than that of other comparative methods. © 2024 Chinese Institute of Electronics. All rights reserved.
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页码：3586 / 3593
页数：7
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