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.
作者
靳舒馨
姚铮
贾深惠
陆明泉
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)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2018年第4期97-103,共7页
Journal of Beijing University of Posts and Telecommunications
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
global navigation satellite system
navigation signal
signal structure
code shift keyingmodulation
non-binary low density parity check code
