北斗系统C波段导航信号调制方式及性能评估  

C-band navigation signal modulation mode and performance evaluation of BeiDou system

作　　者：倪育德 邹玲 刘瑞华 陈万通 秦哲[2] 王凯 NI Yude;ZOU Ling;LIU Ruihua;CHEN Wantong;QIN Zhe;WANG Kai(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China;Sino-Europe Institute of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300 [2]中国民航大学中欧航空工程师学院,天津300300

出　　处：《系统工程与电子技术》2022年第12期3800-3810,共11页Systems Engineering and Electronics

基　　金：中央高校基本科研业务费专项基金(ZXH2011C013);国家重点研发项目(2016YFB0502402)资助课题。

摘　　要：针对C波段卫星导航信号严格的兼容性约束要求,探索性地将基于椭圆球面波函数的连续相位调制(continuous phase modulation based on prolate spheroidal wave functions,CPM-PSWF)应用于C波段导航。在分析了关键参数对CPM-PSWF信号功率谱特性影响后,初步筛选出4个CPM-PSWF子族作为C波段候选导航信号,并对其导航性能指标进行评估。在权衡C波段信号频谱兼容性和各导航性能指标基础上,提出将“QM2PSWF(10)C=6”且h=0.5的CPM-PSWF信号用作北斗系统C波段的导航信号。研究表明,所提出的CPM-PSWF信号频谱泄露少,带外衰减快,同时在码跟踪精度与抗多径性能方面,较当前C波段非CPM-PSWF候选导航信号更具竞争力。In view of the strict compatibility constraint requirements of C-band satellite navigation signals,continuous phase modulation based on prolate spheroidal wave functions(CPM-PSWF)is exploratorily applied to C-band navigation.After analyzing the influence of key parameters on the power spectrum characteristics of CPM-PSWF signal,four CPM-PSWF sub-families are initially screened as candidate navigation signals for C-band,and their navigation performance indicators are also evaluated.On the basis of weighing the spectrum compatibility of the C-band signal and various navigation performance indicators,it is proposed to use the CPM-PSWF signal with“QM2PSWF(10)C=6”and h=0.5 as the C-band navigation signal of the BeiDou system.The research shows that compared with the current C-band non-CPM-PSWF candidate navigation signal,the proposed CPM-PSWF signal spectrum leakage is less,the out-of-band attenuation is faster,and the code tracking accuracy and anti-multi-path performance are more competitive.

关 键 词：C波段导航 基于椭圆球面波函数的连续相位调制 兼容性 导航性能 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]