A New Algorithm of Energy Suppression for Satellite Navigation  

作　　者：JI Yuanfa SUN Xiyan 

机构地区：[1]Satellite Navigation Lab, Guilin University of Electronic Technology, 1 Jinji Road, Guilin 541004, China [2]National Astronomical Observatory, Datun Road, Beijing 100012, China

出　　处：《Geo-Spatial Information Science》2010年第1期65-69,共5页地球空间信息科学学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(No. 60802018);the National Key Basic Research and Development Technology Plan (No. 2007CB815500)

摘　　要：The satellite navigation anti-interference technique, especially space anti-interference technique, is subjected to many restrictions, such as cost, energy depletion, and so on, and the satellite signal strength is limited by the International Radio Advisory Committee, the International Telecommunication Union (ITU) and satellite companies. This paper focuses on satellite navigation systems, especially satellite navigation systems adopting direct sequence spread spectrum (DSSS). The notch filter is used to remove some frequencies from the pseudorandom code frequency spectrum making use of its cyclostationarity first, then the filtered pseudorandom code is modulated by the carrier to attain energy suppression, but the pseudorandom code autocorrelation characteristic stays unchanged. The feasibility of this algorithm is verified by simulation results.The satellite navigation anti-interference technique, especially space anti-interference technique, is subjected to many restrictions, such as cost, energy depletion, and so on, and the satellite signal strength is limited by the International Radio Advisory Committee, the International Telecommunication Union （ITU） and satellite companies. This paper focuses on satellite navigation systems, especially satellite navigation systems adopting direct sequence spread spectrum （DSSS）. The notch filter is used to remove some frequencies from the pseudorandom code frequency spectrum making use of its cyclostationarity first, then the filtered pseudorandom code is modulated by the carrier to attain energy suppression, but the pseudorandom code autocorrelation characteristic stays unchanged. The feasibility of this algorithm is verified by simulation results.

关 键 词：satellite navigation CA code anti- interference notch filter cyclostationarity parasitizing 

分 类 号：TN967.1[电子电信—信号与信息处理] TK018[电子电信—信息与通信工程]