林地场景下的超宽带无线信道模型研究

为了研究超宽带信号在林地中的传播特性,依据信道频域测量数据,提出了符合中国超宽带(UWB)技术频率使用规定的林地场景信道模型.信道总体模型采用修正S-V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超宽带频谱规范的测量信号,利用CLEAN算法得到高分辨率的离散信道响应,并为信道时域测量信号提出了一种基于小波分析的分簇算法,最后统计提取出了信道模型参数.仿真结果表明,提出的林地超宽带信道模型和实测数据有着相近的时延扩展特性和主要多径个数.

Study on Ultra Wideband Modeling for Forest Land Environment

To investigate the propagation characteristics of ultra-wideband (UWB) signal in forest land environment, a channel model for forest land (orchard) was proposed on the basis of frequency-domain measurements according to the UWB frequency regulation of China. The modified S-V model was exploited for the channel modeling. A quasi-Gaussian window with Gaussian transition band was used to extract the measurements that satisfy the UWB frequency regulation of China in the post-processing of channel modeling. Furthermore, a wavelet analysis based cluster identification algorithm was proposed for the time-domain measurements. The channel parameters were extracted on the basis of statistical approach. Simulation results have shown that the proposed forest land UWB channel model has similar delay spread characteristics and similar number of main paths with the measurement data.