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从理论上分析了复合衰落下两支路分布式天线系统信道时延扩展的统计特性,同时作为特例,分析了仅考虑单一尺度衰落时的相关特性。最后在城市环境典型参数下,基于蒙特卡洛仿真对所导出的解析结果进行了验证,仿真结果验证了解析结果的正确性。由于均方根时延扩展的统计特性所依赖的参数多,在实际应用,必须按照实际场景固定某些参数来考察某一参数的影响。
The statistical characteristics of the channel delay spread of the two branch distributed antenna systems under complex fading are theoretically analyzed. At the same time, as a special case, the correlation characteristics when considering only single-scale fading are analyzed. Finally, under the typical parameters of urban environment, the analytical results derived from Monte Carlo simulation are verified. The simulation results verify the correctness of the analytical results. Due to the large number of parameters dependent on the statistical properties of the root mean square delay spread, in practical applications, certain parameters must be fixed according to the actual scene to examine the influence of a certain parameter.