基于TDDM的BOC调制信号伪码同步算法的研究  

Research on PN Code Synchronization Algorithm for TDDM-Based BOC Modulation Signal

作　　者：冯永新[1] 钱博[1,2] 刘芳[1,2] 

机构地区：[1]沈阳理工大学信息科学与工程学院,沈阳110168 [2]南京理工大学控制科学与工程系,南京210094

出　　处：《宇航学报》2011年第3期645-651,共7页Journal of Astronautics

基　　金：国家自然科学基金(60802031);辽宁省高校创新团队项目

摘　　要：BOC调制技术以其独有的裂谱特性在实现信号频段共用的基础上,不断推动着卫星导航技术的发展。然而,新的TDDM机理的应用对实现BOC调制信号伪码高效同步提出了挑战。为此,在深入研究BOC信号同步的基础上,提出了一种新的基于成功捕获比例峰值判决门限和待调整峰比约束门限的TDDM伪码同步捕获判决方法,建立了基于TDDM的BOC调制信号捕获与跟踪的伪码同步算法。进一步,通过仿真实验,验证了新的伪码同步算法的合理和有效性。Based on the unique split spectrum characteristic of the BOC modulation used to share the current signals,the satellite navigation technique has been developed constantly.However,with the application of new TDDM method,the challenges are brought into the effective PN code synchronization for BOC modulated signals.Therefore,a new PN code synchronization acquisition decision method for TDDM is proposed by setting the successful acquisition ratio peak decision threshold and the adjustment-waiting peak ratio limited threshold on the basis of deep research of BOC modulated signal synchronization.As well,a PN code synchronization algorithm including acquisition and track for BOC modulated signal based on TDDM is established.Moreover,the rationality and the validity of new PN code synchronization algorithm are tested by simulation.

关 键 词：BOC TDDM 伪码同步 GPS 

分 类 号：TN96[电子电信—信号与信息处理]