| 引用本文： |
-
谷文飞,吕 晶,常 江,等.星历和星钟参数辅助精度对AGPS接收机捕获性能的影响[J].电讯技术，2011，51（4）： - . [点击复制]
- GU Wen-fei,LV Jing,CHANG Jiang,et al.Influence of Assisted Ephemeris and Space Vehicle Clock Precision on AGPS Receiver Acquisition Performance[J].，2011，51（4）： - . [点击复制]
|
|
| 摘要: |
| 根据辅助型接收机能从
辅助网络获取导航电文的特点，提出了一种精简星历和卫星时钟参数辅助算法。基于MS-bas
ed方式，对比分析了全参数辅助、精简参数辅助、截短参数辅助以及历书辅助模式下的多普
勒偏差和无线通信网络所需传输的信息量。仿真和实验结果表明，截短的星历和星钟参数辅
助同样能很快定位捕获时刻的多普勒频移，额外频移误差增加不足1 Hz，辅助数据量却
减少了1.55倍。 |
| 关键词: AGPS接收机 微弱信号环境 载波频偏 捕获性能 |
| DOI： |
|
| 基金项目:国家高技术研究发展计划(863计划)资助项目(2008AA12Z307) |
|
| Influence of Assisted Ephemeris and Space Vehicle Clock Precision on AGPS Receiver Acquisition Performance |
| GU Wen-fei,LV Jing,CHANG Jiang,XU Rong |
| (Postgraduate Team 4,Institute of Communication Engineering,PLA University of Science and Technology,Nanjing 210007,China;Training Department,Institute of Communication Engineering,PLA University of Science and Technology,
Nanjing 210007,China) |
| Abstract: |
| According to the feature that the AGPS(Assisted GPS) receiver can obtain navigat
ion data from assisted network, a new
algorithm for assisted Doppler is proposed. Based on MS-based mode, the Doppler
bias and transported information on wireless network are compared and analysed
in such mode as full ephemeris and SV(S
pace Vehicle) clock data assistance, reduced ephemeris and SV clock data assista
nce, truncated ephemeris and SV clock data assistance and almanac data assistanc
e. Simulation and experimental results show that in th
e truncated a
ssistance mode，Doppler shift can also be well calculated with negligible extra
bias not more than 1 Hz, but assisted data is reduced by 1.55 times. |
| Key words: AGPS receiver weak signal environment carrier frequency sh
ift acquisition performance |
《电讯技术》编辑部 