【摘要】 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。更多还原

【Abstract】 The modeling method for indoor UWB channel is given,and CLEAN algorithm for extracting channel impulse response is modified.A variant single cluster channel model applicable to the measured environment is proposed.Based on the time-domain indoor experimental channel data,the parameters are extracted with the modified CLEAN algorithm,and this paper describes in detail the method for parameter extraction.For the channel multipath is in single-cluster distribution,the probability density function of multipath delay difference obeys the single parameter exponential distribution,and thus the model is called as variant single cluster channel model.Finally,through channel reconstruction,the delay characteristic of simulated channel impulse response is compared with that of the measured one,and the feasibility of this proposed channel model and the modeling method are verified.更多还原