摘要
卫星导航系统中新体制BOC信号的C/A码自相关函数有多个副峰,多峰特性导致的模糊问题使信号的捕获和跟踪都增大了难度,对这类信号的研究大多局限于某一信号族类,而普遍适用的算法研究较少。根据BOC自相关函数的特点提出消减自相关函数副峰的方法,能够保持主峰宽度不变,提高主峰与副峰的比值,便于BOC的捕获和跟踪。仿真结果表明,即使存在噪声干扰,新算法的捕获成功率依然高于传统的BPSK-like算法。
The new BOC modulation signal in navigation satellite systems has an ACF with multiple side peaks,which induces an ambiguity problem during the signal synchronizing procedure.A side lobe cancellation technique is proposed based on ACF features.By applying the proposed technique,both the main peak and the side peaks are diminished but the main/side peak ratio is significantly increased,which makes it much easier to acquire and track the BOC signal.It is especially compared with traditional BPSK-like method and results show that the proposed technique performs much better in the acquisition success rate even with noise interference.
作者
王剑
戚涵天
WANG Jiana;Qi Hantian(Civil Ariation Air Traffic Management Institute,CAUC,Tianjin 300300,China;SIAE-Europen Intitute of Aviation Engeneering,CAUC,Tianjin 300300,China)
出处
《中国民航大学学报》
CAS
2018年第6期1-5,共5页
Journal of Civil Aviation University of China
基金
国家重点研发计划(2016YFB0502401)
民航安全能力建设项目(AADSA0007)
