Weak DSSS signal acquisition with fine Doppler frequency estimation

被引：4

作者：

Guo, Yichao ^{[1
]}

Huan, Hao ^{[1
]}

Tao, Ran ^{[1
]}

Wang, Yue ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China

来源：

ELECTRONICS LETTERS | 2018年 / 54卷 / 02期

基金：

中国国家自然科学基金;

关键词：

spread spectrum communication; code division multiple access; signal detection; frequency estimation; weak DSSS signal acquisition; fine Doppler frequency estimation; efficient acquisition method; high sensitivity Doppler frequency estimation; direct-sequence spread spectrum signals; parallel code-phase search; triangle fitting; cross-ambiguity function; frequency refining;

D O I：

10.1049/el.2017.3683

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An efficient acquisition method is proposed for high sensitivity and fine Doppler frequency estimation for direct-sequence spread spectrum signals. The proposed method first refines the Doppler frequency after a parallel code-phase search via triangle fitting of the cross-ambiguity function. Then, the information of amplitude and frequency before and after the frequency refining is used to exclude the false alarm. Compared to traditional acquisition methods, the proposed method has higher sensitivity and Doppler frequency estimation accuracy. Simulation results verify the validity of the proposed method.

引用

页码：79 / 81

页数：2

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