东南大学学报（英文版）2007，Vol.23Issue(2)：185-189,5.
用于再生伪码测距时钟恢复的新型码片跟踪环性能分析
Performance analysis of a novel chip tracking loop used for regenerative pseudo-noise ranging clock recovery
张朝杰 1金小军 1郁发新 1金仲和1
作者信息
- 1. 浙江大学信息与电子工程学系,杭州,310027
- 折叠
摘要
Abstract
To improve the performance of composite pseudo-noise (PN) code clock recovery in a regenerative PN ranging system at a low symbol signal-to-noise ratio (SNR), a novel chip tracking loop (CTL) used for regenerative PN ranging clock recovery is adopted. The CTL is a modified data transition tracking loop (DTTL). The difference between them is that the Q channel output of the CTL is directly multiplied by a clock component, while that of the DTTL is multiplied by the I channel transition detector output. Under the condition of a quasi-squareware PN ranging code, the tracking (mean square timing jitter) performance of the CTL is analyzed. The tracking performances of the CTL and the DTTL are compared over a wide range of symbol SNRs. The result shows that the CTL and the DTTL have the same performance at a large symbol SNR, while at a low symbol SNR, the former offers a noticeable enhancement.关键词
时钟恢复/跟踪环路/伪码测距/数据转换跟踪环/码片跟踪环Key words
clock recovery/tracking loops/pseudo-noise codes ranging/data transition tracking loop/chip tracking loop分类
信息技术与安全科学引用本文复制引用
张朝杰,金小军,郁发新,金仲和..用于再生伪码测距时钟恢复的新型码片跟踪环性能分析[J].东南大学学报（英文版）,2007,23(2):185-189,5.
