Key issues of multiple access technique for LEO satellite communication systems  

作　　者：WenPingping GuXuemai 

机构地区：[1]CommunicationResearchCenter,HarbinInstituteofTechnology,Harbin150001,P.R.China

出　　处：《Journal of Systems Engineering and Electronics》2004年第2期120-125,共6页系统工程与电子技术（英文版）

基　　金：This project was supported by National "863" High Technology Research and Development Program of China (863-2-5-2.1).

摘　　要：The large carrier frequency shift caused by the high-speed movement of satellite (Doppler effects) and the propagation delay on the up-down link are very critical issues in an LEO satellite communication system, which affects both the selection and the implementation of a suitable access method. A Doppler based multiple access technique is used here to control the flow and an MPRMA-HS protocol is proposed for the application in LEO satellite communication systems. The extended simulation trials prove that the proposed scheme seems to be a very promising access method.The large carrier frequency shift caused by the high-speed movement of satellite (Doppler effects) and the propagation delay on the up-down link are very critical issues in an LEO satellite communication system, which affects both the selection and the implementation of a suitable access method. A Doppler based multiple access technique is used here to control the flow and an MPRMA-HS protocol is proposed for the application in LEO satellite communication systems. The extended simulation trials prove that the proposed scheme seems to be a very promising access method.

关 键 词：LEO satellites multiple-access protocols flow control Doppler estimation. 

分 类 号：TN927.2[电子电信—通信与信息系统]