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针对蜂窝网络下D2D通信系统提出了一种遍历容量分析方法.首先,对蜂窝网络下D2D通信模型进行了概述,并分析了其上行时隙和下行时隙的干扰情况.在D2D通信系统中很难得到瞬时的信道状态信息,故假设基站和终端仅知道统计的信道状态信息,且信道系数服从独立复高斯分布.基于上述假设,针对上行时隙得出DUE的信干噪比(SINR)表达式,并基于该公式推导出DUE的SINR的概率分布函数和概率密度函数,最终推导出DUE的上行遍历容量.利用相同方法,推导出下行遍历容量.仿真结果表明,即使存在较多DUE情况下仍然可以取得较高的遍历容量.研究结果可用于D2D通信系统的设计与优化.
Aiming at the D2D communication system in cellular network, a traversal capacity analysis method is proposed.Firstly, the D2D communication model in cellular network is summarized and its uplink and downlink timeslots interference situation is analyzed.In the D2D communication system, It is difficult to obtain instantaneous channel state information, so it is assumed that the base station and the terminal only know the statistical channel state information, and the channel coefficients are subject to independent complex Gaussian distributions. Based on the above assumption, the SINR expression And derive the probability distribution function and probability density function of SINR based on the formula, and finally deduce the upward traversal capacity of DUE.Using the same method, the descent traverse capacity is deduced.The simulation results show that, even in the presence of more DUE It can still achieve higher traversal capacity.The research results can be used in the design and optimization of D2D communication system.