一种新的TDCS基函数随机相位产生方法及性能分析  

A New Method of Basis Function's Pseudorandom Phase Generation in TDCS and Its Performance Analysis

作　　者：闫海煜[1] 

机构地区：[1]重庆电子工程职业学院通信工程学院,重庆401331

出　　处：《电子器件》2014年第3期574-578,共5页Chinese Journal of Electron Devices

摘　　要：针对变换域通信系统对随机相位随机性与相关性的要求,提出了一种采用混沌映射m序列控制法的基函数相位映射方法,相比于传统一维m序列产生基函数,该方法所产生基函数的随机性提高了N倍(N为m序列的长度);同时由于采用混沌映射,产生了大量互相关系数很小的基函数,具有更加良好的相关性。仿真结果表明,采用混沌映射m序列控制法的基函数相位映射方法,提高了基函数的相关性,有效地降低了系统的误码率。Based on the requirements of the pseudorandom phase vector in transform domain communication system （TDCS）, a new method using chaos mapping and m-sequences control to generate the pseudorandom phases of the basis function in TDCS was proposed. The implementation method and the simulation results regarding the correlation performance for the basis function were discussed in detail. Compared with that of the parallel, the basis function＇s randomicity of the new method is N times by that of one-ary method（ the length of m-sequence is N） ,as well the basis functions have better correlation performance for that many basis functions with small cross-correlation coefficients can be generated by chaos mapping. The simulation results show that the correlation performance of the basis function produced by the new method was improved and the performance on BER was better.

关 键 词：变换域通信系统 基函数 随机相位 M序列 混沌映射 

分 类 号：TN929.5[电子电信—通信与信息系统] TN926[电子电信—信息与通信工程]