摘要
基于代数方法和PN码相关函数几何图形分析,提出一种与本底噪声完全无关的延迟锁定环鉴别器D NELE_FN,彻底解决了传统延迟锁定环鉴别器与本底噪声有关的问题。D NELE_FN鉴别器无需增加硬件和计算量,对消了环路本底噪声,充分利用了包络P的信噪比比包络E和包络L信噪比高的特性,提高了码环路的跟踪测量精度,进而提高了GNSS接收机的定位精度;同时,有助于GNSS接收机更抗差地跟踪弱信号。
Based on algebraic method and geometric relationship of PN code correlation function, presents a noise-floor independent discriminator D_NELE_FN of delay lock loop is presented which completely solves the problem of noise-floor dependence in conventional delay lock loop. D_NELE_FN discriminator requires no extra hardware or computing load and improves the accuracy of both the code phase measurement and GNSS positioning by means of cancelling floor noise in the loop in accordance of the principle that SNR in envelop P is usually higher than that in envelop E and L. In this way, DNELE FN discriminator improves positioning accuracy of GNSS receiver. Moreover, D_NELE_FN discriminator can help the GNSS receiver track weak signal more robustly so that the obtained measurement of code phase and solution of receiver positioning possess better availability.
出处
《现代雷达》
CSCD
北大核心
2013年第11期71-75,共5页
Modern Radar
关键词
延迟锁定环鉴别器
本底噪声
跟踪测量精度
discriminator of delay lock loop
noise floor
accuracy of tracking and measurement
作者简介
通信作者：解宝同Email：bjxbt126@126．com解宝同 男，1968年生，高级工程师。研究方向为多普勒导航、多传感器组合导航系统设计、算法分析和软件设计。
