Performance analysis and code recognition for dual N-ary orthogonal hybrid modulation systems  

作　　者：乔晓强 Zhao Hangsheng Cai Yueming 

机构地区：[1]The 63rd Research Institute of the PLA General Staff Headquarters, Nanjing 210007, P.R.China [2]Institute of Communications Engineering, PLAUST, Nanjing 210007, P.R. China

出　　处：《High Technology Letters》2008年第2期113-117,共5页高技术通讯（英文版）

基　　金：the National Basic Research Program of China(No5130601);Jiangsu Provincial Natural Science Foundation(NoBK2006701)

摘　　要：A dual N-ary orthogonal hybrid modulation system is introduced in this paper, which can increase the data rate greatly compared with conventional N-ary orthogonal spread spectrum system, so it can be used for high rate data communication. Then, three code recognition algorithms are presented for dual N-ary orthogonal hybrid modulation system and the analytic bit error rate （BER） performance of the system in additive white Gaussian noise （AWGN） and fiat Rayleigh fading channel is derived. Finally, the computer simulation of the system with three code recognition algorithms is performed, which shows that the simplified maximum a posteriori （MAP） algorithm is the best for the system with a compromise between the performance and the complexity.A dual N-ary orthogonal hybrid modulation system is introduced in this paper,which can increasethe data rate greatly compared with conventional N-ary orthogonal spread spectrum system,so it can beused for high rate data communication.Then,three code recognition algorithms are presented for dual N-ary orthogonal hybrid modulation system and the analytic bit error rate(BER)performance of the systemin additive white Gaussian noise(AWGN)and flat Rayleigh fading channel is derived.Finally,the com-puter simulation of the system with three code recognition algorithms is performed,which shows that thesimplified maximum a posteriori(MAP)algorithm is the best for the system with a compromise betweenthe performance and the complexity.

关 键 词：code recognition N-ary orthogonal spread spectrum hybrid modulation MAP （maxi-mum a posteriori） algorithm 

分 类 号：TN919.3[电子电信—通信与信息系统]