A differentially coherent delay-locked loop for spread-spectrum tracking receivers

被引：11

作者：

Fan, CC

Tsai, Z

机构：

[1] St Johns & St Mary Inst Technol, Dept Elect Engn, Taipei, Taiwan

[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan

来源：

IEEE COMMUNICATIONS LETTERS | 1999年 / 3卷 / 10期

关键词：

correlator; delay-locked loop; direct sequence; spread spectrum; tracking error variance;

D O I：

10.1109/4234.798018

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

A novel differentially coherent delay-locked loop (DCDLL) for accurate code tracking is proposed for direct sequence spread spectrum systems, Due to the use of the differential decoder and exactly one correlator, the proposed scheme avoids the problems of gain imbalance. The tracking error variance is derived by linear analysis. When the proposed DCDLL scheme is applied in ranging with additive white Gaussian noise (AWGN) channel, the performance of the proposed DCDLL scheme is about 1.4 dB better than that of one-correlator tau-dither loop (TDL), and near that of noncoherent DLL.

引用

页码：282 / 284

页数：3