Near-far effect mitigation method using pseudolite signal acquisition  

基于伪卫星信号捕获原理的抗远近效应方法研究（英文）

作　　者：WANG Di CHEN Guang-wu LIU She-de 王迪;陈光武;刘射德(兰州交通大学自动控制研究所,甘肃兰州730070;甘肃省高原交通信息工程及控制重点实验室,甘肃兰州730070)

机构地区：[1]Automatic Control Institute y Lanzhou Jiaotong University y Lanzhou 730070 y China [2]Gansu Provincial Key Laboratory o f Traffic Information Engineering and Control, Lanzhou 730070 , China

出　　处：《Journal of Measurement Science and Instrumentation》2017年第3期228-237,共10页测试科学与仪器（英文版）

基　　金：Gansu Province Basic Research Innovation Group Plan(No.1606RJIA327);Natural Science Foundation of Gansu Provinc(No.1606RJYA225);Lanzhou Jiaotong University Youth Fund(No.2014031);Longyuan Youth Innovative Support Program(No.2016-43)

摘　　要：In this paper,a new idea based on pseudolite signal acquisition method aiming to mitigate the near-far effect problemin the satellite positioning is proposed.After analyzing the signal capture principle based on coherent integration and non-coherentaccumulation,the cross-correlation interference of strong and weak signals is eliminated by means of normalization of reconstructedstrong signal and judgement of the characteristics of the peak value,which can avoid the near-far effect of the pseudolitesignal.It can also estimate all the strong signals without any additional hardware.By building an indoor pseudolite positioningsystem,the capture performance becomes better based on improved acquisition algorithm compared with that based on thenon-coherent accumulation after coherent integration algorithm.The near-far effect is restrained effectively and the probabilityof weak signal detection is increased by25%.

关 键 词：PSEUDOLITE near-far effect coherent integral KURTOSIS 

分 类 号：TN967.1[电子电信—信号与信息处理]