一种新颖的GNSS BOC信号无模糊相关技术研究  

Novel Unambiguous Correlation Technology for GNSS BOC Signals

作　　者：赵亮[1] 翟建勇[1] 

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2014年第3期167-170,共4页Modern Navigation

摘　　要：现代GNSS卫星导航系统建设中,采用了BOC、MBOC和AltBOC等新体制信号。新体制信号虽然有优于BPSK信号的性能,但其相关函数的多副峰特性导致其较传统BPSK信号难于捕获和跟踪,特别是在多径环境下,难度进一步加大。本文首先对BOC信号的数学特性及模糊问题成因进行了分析,进而提出了一种新的BOC相关函数无模糊相关技术。最后,通过Matlab仿真验证了算法的有效性,为BOC信号无模糊跟踪的工程实现奠定理论基础。Morden GNSS has adopted the new navigation, such as BOC,MBOC and AltBOC etc. The performance of BOC modulation is better than BPSK modulation. However, auto-correlation function （ACF） of BOC modulated signal has the multiple side peaks due to subcarrier modulation. So, it is difficulty in acquision and tracking for BOC modulated signal, especially in multipath propagation. In this paper, based on analyzing the ambiguous problem of BOC, a novel unambiguous correlation technique is developed. Finally, the validity of the proposed algorithm is verified through computer simulation. Research results can be used to guide the implementation of unambiguous tracking for BOC signals.

关 键 词：BOC调制 GNSS 无模糊相关 

分 类 号：P228.4[天文地球—大地测量学与测量工程]