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该文针对衰落信道,从信息流的角度,研究了加性高斯白噪声干扰场景下的信道容量、信道服务量、以及信道容量与总服务量之间的关系。从理论上推导出:在大小尺度衰落共同作用的信道,且发送功率恒定的条件下,基站间距由服务量决定,并随着列车速度v的增加而增加。通过仿真实验,对比该结论与大尺度衰落作用下的结果:在相同基站间距的条件下,同时考虑大尺度衰落和小尺度衰落时,给定单基站的平均服务量与大尺度衰落下的单基站平均服务量相比,相对差值比率小于0.2%。这意味着在实际基站间距设计中,只考虑大度衰落是有效的。
In this paper, we study the relationship between channel capacity, channel capacity, channel capacity and total service volume in the case of fading channel and information flow. It is theoretically deduced that under the co-channel of size-scale fading and with constant transmission power, the base station spacing is determined by the service volume and increases as the train speed v increases. The simulation results show that under the condition of the same base station spacing, both the large-scale fading and the small-scale fading are considered at the same time. When the average service volume of a given single base station is compared with the single base station with large-scale fading, Compared to the average service volume, the relative difference ratio is less than 0.2%. This means that in the actual design of the base station spacing, only considering the large decline is effective.