摘要
BOC调制方式适应导航发展的新需要,它实现了频谱分裂以充分利用现有频段资源,且具有比传统BPSK调制方式更好的相关性能,从而可以提高根据相关特性测距的精度。介绍了BOC调制信号的频谱、功率谱和相关函数的特点。针对BOC调制信号相关函数的多峰结构容易造成捕获模糊,提出了3种相应的接收处理方法:类似BPSK的单边带处理方法、峰跳法和一种无模糊跟踪鉴相器算法。
The BOC modulation accommodates to the new development of satellite navigation,which realizes the split of spectrum to make full use of the available frequency bands, and possesses better autocorrelation property than the classic BPSK modulation, so can improve the precision of the preudorange. This paper introduces the spectrum, power spectrum and the autocorrelation of BOC modulation; then presents three kinds of techniques to eliminate the ambiguity of the multi-peak of autocorrelation function to achieve BOC acquisition, which are BPSK like method, bump-jump method and one algorithm of unambiguous tracker for BOC signals.
出处
《无线电工程》
2007年第3期31-33,共3页
Radio Engineering
关键词
BOC调制
卫星导航
相关函数
捕获
BOC modulation
satellite navigation
autocorrelation function
acquisition
