自适应调制MIMO系统的最小化发射功率准则
doi: 10.3724/SP.J.1146.2005.00713
MTP Adaptive Modulation Criterion for MIMO Systems
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摘要: 该文提出了一种新的适用于多输入多输出系统的最小化发射总功率自适应调制准则，给出了其在完美信道反馈条件下最佳功率/比特分配方案的理论闭式解及非完美反馈时实现算法。最小化发射功率准则的显著优点是能够在满足用户需要的传输速率和误比特率的前提下，以尽可能小的发射功率实现数据传输，使无线网络中的跨层优化成为可能。Abstract: In this paper, a novel optimization criterion is presented for Adaptive Modulation (AM) Multi-Input and Multi-Output (MIMO) system, which aims at finding out proper modulation and power allocation parameters to reach the required Quality of Services (QoS), while the overall transmission power is minimized. The closed-form solution under perfect Channel State Information (CSI) and the practical algorithm under imperfect CSI are given. The simulation results show that the proposed criterion is very helpful to make cross-layer optimization by taking the QoS requirements into account much easier.
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