摘要
在导航接收机的伪距测量中,码跟踪精度起着重要作用,而码跟踪环路的性能由码鉴相器的鉴相曲线决定。本文首先介绍了BOC(1,1)信号的功率谱特性和自相关特性,然后通过仿真分析BOC(1,1)和BPSK(1)两种信号的非相干延迟锁定环的鉴相器输出和环路跟踪误差,得出两种信号在码跟踪性能上的差异。通过比较发现,BOC信号较BPSK信号在跟踪的鲁棒性和精度等方面具有显著优势。
The precision of code tracking is important for pseudo-range measurement in navigation receiver.Discriminator curve can be used for qualitatively judging the performance of code tracking loop.The structure and characteristic of BOC(1,1) signals were analyzed thoroughly firstly.Then through analyzing and comparing the output of the DLL discriminators and tracking precision between BOC(1,1) and BPSK(1) signals,the differences of code tracking performance between them were resolved.It was validated that BOC signal has more robust and precise tracking as compared to BPSK signal.
出处
《测绘科学》
CSCD
北大核心
2013年第3期66-68,共3页
Science of Surveying and Mapping
