摘要
自回归(AR)模型和Clarke模型(CLARKE R H.A statistical theory of mobile-radio reception.Bell SystemTechnology Journal,1968,47(6):957-1000)常用于产生瑞利(Rayleigh)衰落信道。但是仿真结果显示自回归模型有其自身无法避免的数值缺陷,因此无法产生理想的Rayleigh衰落信道特性。在Clarke模型的基础上提出了改进模型。新模型合理地减少了入射波到达角的随机分布范围,在保证到达角随机分布特性的同时获得了信道模型更好的统计特性。仿真结果表明,改进模型比Clarke模型具有更好的统计性能,可以用于产生较理想的Rayleigh衰落信道。
AutoRegression（AR） model and Clarke model（CLARKE R H.A statistical theory of mobile-radio reception.Bell System Technology Journal,1968,47（6）： 957-1000） are typically used for the simulation of Rayleigh fading channels.But the results show that AR model has unavoidable numerical difficulties,hence it cannot generate the desired correlations of Rayleigh fading channels.Based on the Clarke model,an improved Sum-Of-Sinusoids（SOS） model was proposed,which reduced the distribution of the angel of arrivals and ensured its random distribution.Therefore,the new model could achieve better statistical properties of generated channels.Judging the variance of the time average statistical properties from their ideal ensemble averages,the new model has better performance and its statistical convergence to the desired correlations is faster than Clarke model.
出处
《计算机应用》
CSCD
北大核心
2011年第8期2059-2061,共3页
journal of Computer Applications
基金
陕西省教育厅专项科研基金资助项目(2010JK83809JK730)
西安邮电学院中青年科研基金重点资助项目(ZL2009-5)
