大型客车车厢环境下的超宽带信道模型

依据频域信道测量数据,提出了符合中国超宽带(UWB)技术频率使用规定的大型客车车厢信道模型.在信道测量信号的后处理中,使用过渡带为高斯滚降特性的类高斯窗来提取符合中国UWB频谱规范的测量信号,并为信道时域测量信号提出了一种基于小波分析的自动分簇算法来替代人眼分簇.信道模型采用修正Saleh-Valenzuela模型,从测量数据中统计提取信道模型参数,并依据模型参数仿真实现了信道模型.结果表明,提出的大型客车车厢信道模型和信道实测数据有相似的附加时延、均方根时延扩展特性和平均多径个数.

A New Ultra Wideband Channel Model Used in Vehicle Cabin Environment

A channel model for vehicle(bus) cabin is proposed based on frequency-domain channel measurements according to the ultra-wideband(UWB) frequency regulation specification of China.A quasi-Gaussian window with Gaussian transition band is used to extract the measurement signal specified by UWB frequency regulation of China in the post-processing of channel modeling.Furthermore,an automatic wavelet analysis based cluster identification algorithm is proposed for the time-domain measurements instead of visual inspection.The modified Saleh-Valenzuela model is exploited as the channel model and the channel parameters are extracted statistically from channel measurement data.Results is shown that the proposed vehicle cabin UWB channel model has similar excess delay,root mean square delay spread characterization and number of main paths with the measurement data.