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通过理论推导和仿真对一个存在同频干扰的上行蜂窝网中的合作多输入多输出(MIMO)系统的信道容量进行了研究,仿真结果表明由于严重的同频道干扰,整个上行蜂窝系统无法实现全频率复用。提出了一种基于分数频率复用(FFR)与合作MIMO相组合的网络结构以及两种系统时频资源分配方案。信道容量计算结果显示:考虑同频道干扰时,对于信道传播损耗因子较小、小区半径较小或发射功率较大的情况,该分数频率复用与合作MIMO的组合系统的信道容量会超过频率复用因子为1的合作MIMO系统。通过该组合结构可以实现频率复用率和同频道干扰抑制间的折中,从而获得较大的信道容量。
Through theoretical derivation and simulation, the channel capacity of a cooperative multiple-input multiple-output (MIMO) system in a co-channel interference uplink cellular network is studied. The simulation results show that the entire uplink cellular system can not be fully implemented due to the severe co-channel interference Frequency reuse. A network structure based on fractional frequency reuse (FFR) combined with cooperative MIMO is proposed and two system time-frequency resource allocation schemes are proposed. The results of channel capacity calculation show that the channel capacity of the combined system with fractional frequency reuse and cooperative MIMO will exceed the frequency recovery when the co-channel interference is considered, for the case that the channel propagation loss factor is small, the cell radius is small or the transmission power is large A cooperative MIMO system with a factor of 1. Through this combination structure, the trade-off between frequency reuse rate and co-channel interference suppression can be achieved, so as to obtain a larger channel capacity.