基于最小速率的MIMO多接入信道容量和最优功率分配策略  

Minimum-Rate Capacity and Optimal Power Allocation for MIMO Fading Multiaccess Channels

作　　者：潘成康[1] 蔡跃明 徐友云[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《应用科学学报》2005年第4期355-358,共4页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目(60372080);江苏省自然科学基金资助项目(BK200414)

摘　　要：分析了平均功率受限条件下,基于最小速率约束的MIMO多接入信道容量域,并给出了最优功率分配策略.策略分为两个步骤:第一步分配给每个用户所有信道状态下,保证最小速率的最小功率;第二步采用多级注水分配剩余功率最大化遍历容量.分析表明顺序译码是获取容量的有效手段,数值结果显示出,策略在满足最小速率约束要求下获得了显著的容量增益,取得了很好的性能折衷.The capacity region with average power constraints of MIMO fading multi-access channels based on minimum rate requirements is analyzed and the optimal power allocation strategy is suggested. The strategy is a two-step process, the allocation of the minimum power required to achieve the minimum rates and the optimal allocation of the excess power to maximize the ergodic rates. It is shown the minimum-rate capacity can be achieved by successive decoding. The numerical results show that, the strategy provides notable capacity gain and good tradeoff in performance.

关 键 词：多输入多输出 多接入信道 最小速率容量 功率分配 

分 类 号：TN929[电子电信—通信与信息系统]