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研究分布式天线系统单小区下行传输时的多用户和速率问题,采用复合衰落信道模型,包括路径损耗、阴影衰落和多径衰落.利用基于矩生成函数和高斯-埃尔米特积分的方法推导了多用户遍历和速率的解析表达式,并通过蒙特卡罗仿真验证了解析表达式的正确性.提出一种基于模式搜索的传输模式选择算法以确定最佳传输模式,即分布式天线与移动台之间的配对方式,从而使遍历和速率最大化.提出的传输模式选择算法与基于最小距离的传输模式选择算法相比,可以达到相近的小区平均遍历和速率,而在特定数量分布式天线单元的情况下,前者目标函数的平均计算次数要小于后者.
The problem of multi-user and rate in single-cell downlink transmission of distributed antenna system is studied, and composite fading channel model is adopted, including path loss, shadow fading and multipath fading.Based on the method of moment generating function and Gauss-Hermitian integral The multi-user traversal and the rate of the analytical expression, and verify the correctness of the analytical expression by Monte Carlo simulation.We propose a transmission mode selection algorithm based on pattern search to determine the best transmission mode, that is, distributed antenna and mobile The pairing way between the stations, so that the traversal and the maximum rate.The proposed transmission mode selection algorithm and based on the minimum distance of the transmission mode selection algorithm can achieve similar average cell traversal and rate, and in a specific number of distributed antennas In the case of a unit, the average of the objective function of the former is less than that of the latter.