哈尔滨工程大学学报2018，Vol.39Issue(4)：778-784,7.DOI:10.11990/jheu.201610022
L/C双频段联合导航信号中通用调制方案研究
General modulation scheme for L/C dual-frequency combined navigation signal
摘要
Abstract
To ease the already overcrowded radio spectrum in the L band,the C band(5 010~5 030 MHz)was allocated by the international telecommunication union(ITU)to the navigation service,which makes it possible to combine navi-gation of the L and C frequency bands.The modulation scheme is the core part of the design of signal structure,and it is necessary to design a general modulation scheme that meets the requirements of all bands,reduces complexity of the multi-frequency terminal,and accelerates the practical course of multi-band combined navigation.Aimed at the distribu-tion of frequency points of(BDS)B3 signal,this paper designs a double-frequency combination model of the L and C bands,and proposes to take continuous phase modulation(CPM)as the general modulation scheme for the above bands. In comparison with the prevailing scheme,simulation results indicate that CPM has high spectral efficiency.In addition, it has advantages in terms of tracking accuracy,multipath mitigation,and compatibility.Furthermore,it also satisfies stringent constraints required for the C band and makes general signal design possible.This paper therefore provides a new concept and provides a feasible demonstration of the future BDS signal modulation scheme.关键词
L/C双频段/联合导航/信号体制/调制方案/连续相位调制/信号设计/码跟踪精度/抗多径/兼容性Key words
L/C dual-frequency band/combined navigation/signal structure/modulation scheme/continuous phase modulation/signal design/tracking accuracy/multipath mitigation/compatibility分类
信息技术与安全科学引用本文复制引用
孙岩博,薛睿,王盾,赵旦峰..L/C双频段联合导航信号中通用调制方案研究[J].哈尔滨工程大学学报,2018,39(4):778-784,7.基金项目
国防科技基金资助项目(0104041) （0104041）
天地一体化信息技术国家重点实验室开放基金项目(2015_SGIIT_KFJJ_DH_03) （2015_SGIIT_KFJJ_DH_03）
中央高校基本科研业务费专项基金项目(HEUCFP201769) （HEUCFP201769）
上海航天科技创新基金项目(SAST2017-111). （SAST2017-111）
