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根据网络对偶的原则,建立多用户多入多出(MIMO)下行链路的对偶网络,即虚拟上行链路,推导出下行链路的每一个用户数据流的SINR的数学表达式。在多用户MIMO系统的上行链路和下行链路的互相转换中,其SINR的值保持不变,从而得出其SINR是对偶的。在此基础上,给出了上行链路功率控制的两种算法。仿真结果表明:分组功率分配算法的性能优于一般的功率分配算法的性能。
According to the principle of network duality, a dual network of multi-user multiple-input multiple-output (MIMO) downlink is established, that is, a virtual uplink, and a mathematical expression for SINR of each user data stream in the downlink is deduced. In the inter-conversion of the uplink and downlink of a multi-user MIMO system, the SINR value remains unchanged, so that its SINR is dual. On this basis, two algorithms of uplink power control are given. The simulation results show that the performance of packet power allocation algorithm is better than that of general power allocation algorithm.