一种基于循环码的双多进制正交扩频系统的性能分析  

Performance Analysis of a Dual M-ary Orthogonal Spread Spectrum System Based on Orthogonal Cyclic Codes

作　　者：姚俊[1] 褚振勇[1] 易克初[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,西安710071

出　　处：《电讯技术》2006年第5期84-88,共5页Telecommunication Engineering

基　　金：国防科技重点实验室基金项目(51473020105JB3203)

摘　　要：以正交循环码为基础,提出了一种适合于高速业务传输的双多进制正交扩频系统方案,降低了系统选码的难度,提高了用户容量。在接收端通过FFT快速算法,极大地降低了解扩的运算量。同时也分析了系统在加性高斯噪声信道和瑞利衰落信道下的误比特率性能,并给出了对应的计算机仿真结果。Based on orthogonal cyclic codes, a dual M - ary orthogonal SS （Spread Spectrum） system scheme is presented to transmit high rate data. It can reduce the difficulty of selecting PN codes and increase user numbers in the system. Using FFT scheme in receiver, the computational complexity of despreading is reduced greatly. The theoretical BER performance of the system in AWGN and Rayleigh fading channels is analyzed and the computer simulation results are provided.

关 键 词：M元正交扩频 双正交循环码 FFT 

分 类 号：TN914.1[电子电信—通信与信息系统]