高速率GNSS电文多进制编码调制技术  

High-Speed Non-Binary Coding and Modulation Techniques of GNSS Message

作　　者：靳舒馨 姚铮[1] 贾深惠 陆明泉[1] JIN Shu-xin;YAO Zheng;JIA Shen-hui;LU Ming-quan(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Beijing Satellite Navigation Center,Beijing 100094,China;The 31001 forces of PLA,Beijing 100092,China)

机构地区：[1]清华大学电子工程系,北京100084 [2]北京市卫星导航中心,北京100094 [3]中国人民解放军31001部队,北京100092

出　　处：《北京邮电大学学报》2018年第4期97-103,共7页Journal of Beijing University of Posts and Telecommunications

摘　　要：为解决导航电文信息速率制约导航系统性能的问题,提出了一种基于码移键控调制和多进制低密度奇偶校验码的新型全球卫星导航系统（GNSS）信号编码调制技术.在-130 d Bm的接收电平、误码率不大于10-7的指标下,该技术可以达到1 500 bit/s的有效信息速率,并且具有信号结构简单、与现有GNSS信号兼容性强等优势.理论分析和仿真结果证明,该技术突破了现有卫星导航信号体制下的信息速率极限,能够克服复杂信号结构造成的难以独立捕获跟踪的问题,在卫星导航系统中有比较重要的实用价值.To solve the problem of navigation message rate limiting the performance of global navigation satellite system（ GNSS）,a new technology of GNSS signal design based on code shift keying modulation and non-binary low density parity check code is discussed. At a receiving level of-130 d Bm and an error rate of no more than 10^（-7）,the information rate can be up to 1 500 bit/s. Meanwhile,it has the advantages of simple signal structure and strong compatibility with existing GNSS signals. Theoretical analysis and simulation prove that this technology can break through the limit of information rate under the existing GNSS signal system,and overcome the difficulties of acquisition and tracking caused by complex signal structure. Therefore,it has important practical value in GNSS.

关 键 词：全球卫星导航系统 导航信号 信号体制 码移键控调制 多进制低密度奇偶校验码 

分 类 号：TN96[电子电信—信号与信息处理]