在分布式发射天线的多小区环境下,分析了多层同频干扰对小区平均遍历容量及天线位置的影响,给出了分布式天线位置选择与小区平均遍历容量的关系.数值分析和仿真结果表明外围的第一层同频小区干扰能量决定了分布式天线的最佳位置摆放,在半径1000m的小区中,各天线距离小区中心450m附近时,小区的平均遍历容量达到峰值.
The effect of co-channel interference of multiple tiers of cells on both average ergodic capacity and optimal antenna location is analyzed in a multicell environment with distributed transmit antennas,and the relationship between the optimal antenna location and the average ergodic capacity is also studied.Numerical analysis and simulation results show that the optimal distributed antenna location is determined by the interference energy of the first tier of peripheral co-channel interfering cells.For example,In a cell with a typical radius of 1000 meters,the average ergodic capacity of the cell reaches the peak when all antennas are located at about 450 meters from the center.