Y2000-62074-1063 0008031上行线路滤波和有噪声的卫星线路的最佳数据预失真仪设计的有效方法=An efficient approach to optimaldata predistorter design for satellite links with filteringand noise in the uplink[会,英]/LIm,J.-H...Y2000-62074-1063 0008031上行线路滤波和有噪声的卫星线路的最佳数据预失真仪设计的有效方法=An efficient approach to optimaldata predistorter design for satellite links with filteringand noise in the uplink[会,英]/LIm,J.-H.& Krog-meier,V.//1999 IEEE International Conference onCommunications,Vol.2 of 3.—1063～1068(H)展开更多
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 li...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.展开更多
文摘Y2000-62074-1063 0008031上行线路滤波和有噪声的卫星线路的最佳数据预失真仪设计的有效方法=An efficient approach to optimaldata predistorter design for satellite links with filteringand noise in the uplink[会,英]/LIm,J.-H.& Krog-meier,V.//1999 IEEE International Conference onCommunications,Vol.2 of 3.—1063～1068(H)
基金Supported by the National Natural Science Foundation of China(No. 60802018)the National Key Basic Research and Development Technology Plan (No. 2007CB815500)
文摘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.
