AltBOC恒包络调制及Matlab仿真

Constant Envelope AltBOC Modulation and Matlab Simulation

Alt BOC(Alternate Binary Offset Carrier)首先在伽利略E5频段上被提出,该调制信号具有频谱利用率高,跟踪精度好及抗多径等性能,目前北斗导航系统也计划采用这种调制信号。文章首先介绍了Alt BOC的基本原理,然后详细阐释了恒包络Alt BOC调制的实现方法,特别是用查表法来方便地实现Alt BOC恒包络调制,最后在Matlab中对查表法进行了仿真。

AltBOC（Alternate Binary Offset Carrier） is first proposed in Galileo E5, which has the property of making full use of the spectrum and improving the precision of tracking and multipath effect. Now, Beidou is going to adopt AItBOC modulation as well. In the paper, we first introduce the basics of AItBOC modulation, thenwe explain the details of relazation of constant envelopeAltBOC modulation. Particularly, there is an easy way to do the constant envelopeAltBOC modulation by look-up table method. We simulate the look-up table method in Matlab.