摘要
MBOC(Multiplexed Binary Offset Carrier)调制是GalileoE1频段以及GPS L1C频段推荐使用的一种优化调制方式。与BOC调制相比,MBOC调制方式的功率谱密度函数提供了更为丰富的高频分量,因此具有更高的伪码跟踪精度和抗多径性能。Galileo E1 OS采用了CBOC(6,1,1/11)(Composite Binary Offset Carrier)的方式实现MBOC调制。通过MATLAB仿真,对该信号的自相关函数、频谱特性进行了研究,并且通过与BOC调制信号的比对,证明了MBOC在码跟踪特性和抗多径性能方面的优越性。
MBOC （Multiplexed Binary Offset Cartier） is an optimized modulation recommended for GALILEO L1 OS and GPS LIC. Compared with BOC, MBOC spreading modulation provides more high frequency power, so it can improve the pseudorange precision and mitigate the multipath effect. CBOC （Composite Binary Offset Carrier） signal is adopted for Galileo. This paper introduces the power spectral density and autocorrelation of MBOC modulation, then analyses its additional benefits including code tracking in noise and mitigation of multipath effect through MATIAB simulation.
出处
《无线电工程》
2008年第10期32-34,共3页
Radio Engineering
