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Received:July 28, 2015
Received:July 28, 2015
中文摘要: 针对移动网络在高铁通讯时存在接收信号不稳定问题,开展了多普勒效应及多径时延对正弦波叠加(Sum-of-Sinusoid,SOS)模型、XIAO模型 (Jakes仿真器)和LIU Qian模型的影响研究.分析了3种模型的信噪比、相关性以及处理信号衰减的程度,结果表明,在多普勒效应及多径时延的环境下,SOS模型的算法复杂度最低,LIU Qian模型反之,而传递函数相关性最佳,XIAO模型对接入信号的衰落程度最小;在保证传输效率、信道容量足够的前提下,LIU Qian模型中接收信号的失真程度较小,更适宜作为高速移动环境下无线信道的研究模型.
Abstract:With the increasingly faster trains,the quality of communication system gets worse so that the accepted signal is not stable.Research is conducted on the doppler-frequency shift and multipath effects on Sum-of-Sinusoid (SOS) model,XIAO model (Jakes Simulator),and LIU Qian model.According to the SNR (Signal to Noise Ratio) function under AWGN (Additive-White Gaussian Noise),the correlation function and the received signal attenuation degree,the analysis shows that SOS model got the least accuracy but best algorithm complexity,LIU Qian model has the best transfer function but least algorithm complexity and XIAO model has the least degree of the received signal attenuation in the Doppler-frequency shift and multipath delay effects of environment.As a result,while the transmission efficiency and the channel capacity meets the required service levels,LIU Qian model has the least distortion degree and should be the best study model of high-speed wireless channel.
keywords: intelligent transportation multipath fading Doppler shifts high-speed wireless channel relative characterization
文章编号：20160116 中图分类号： 文献标志码：
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