论文部分内容阅读
介绍了室内超宽带(UWB,Ultra-wideband)信道的建模方法,对提取信道冲激响应的CLEAN算法进行了改进,提出了适合于测量环境的变形单簇信道模型。基于一组室内信道的时域测量数据,利用改进的CLEAN算法提取了信道冲激响应,并详细介绍了其它参数的提取步骤和方法。由于信道多径呈单簇分布,且多径时延差的概率密度函数服从单参数指数分布,故称模型为变形单簇信道模型。最后通过信道重建,将仿真信道与实测信道的时延特性进行了对比,验证了信道模型的正确性和建模方法的可行性。
The modeling method of indoor UWB (Ultra Wideband) channel is introduced. The CLEAN algorithm for extracting channel impulse response is improved. A modified single-cluster channel model suitable for the measurement environment is proposed. Based on the time-domain measurement data of a group of indoor channels, the channel impulse response is extracted by the improved CLEAN algorithm. The extraction steps and methods of other parameters are introduced in detail. Since the channel multipath is a single cluster distribution, and the probability density function of multipath delay difference is subject to a single parameter exponential distribution, the model is called a deformed single-cluster channel model. Finally, through the channel reconstruction, the delay characteristics of the simulated channel and the measured channel are compared, which verifies the correctness of the channel model and the feasibility of the modeling method.