BOC(10,5)信号的调制与解调

Modulation and Demodulation of BOC(10,5) Signals

讨论了卫星导航中BOC调制解调的原理和实现方法,并着重研究了接收机的码跟踪技术。首先阐述了BOC信号体制出现的国际背景及信号特点,并介绍了BOC(10,5)信号形式和频谱特性,然后简要介绍了信号调制的方法,最后重点讨论信号解调方法。针对BOC信号多峰结构的自相关特性,分别研究并比较了两种解调方案,最后综合两者特点提出了组合式解调恢复方法。

This paper discusses the theory and the realization approach of BOC modulation and demodulation in satellite navigation system,and focuses on the BOC code tracking technology. It describes the inter- national background of BOC appearance and the signal characteristics, and introduces BOC （10,5） signal discusses the signal demodulation approach. BOC waveforms have autocorrelation functions containing multiple peaks, thus this paper compares two different techniques to eliminate incorrect delay - lock code tracking, and proposes the new scheme which uses the summation of two different restoring forces.