Capacity analysis and optimal power allocation for coordinated transmission in MIMO-OFDM systems
Capacity analysis and optimal power allocation for coordinated transmission in MIMO-OFDM systems
复制标题
MIMO-OFDM 系统中协调传输的容量分析和最佳功率分配
DOI：
10.1007/s11432-012-4563-1
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发表时间：
2012-03
期刊：
影响因子：
--
通讯作者：
Jun Jiang
中科院分区：
文献类型：
--
作者：
Qimei Cui;Bing Luo;Xueqing Huang;Jun Jiang
近年来，多小区协调网络中的协调传输问题备受关注。本文研究了该领域的一个开放问题，即如何求解具有多个天线配置和单个功率约束的下行正交频分复用（OFDM）系统中协调传输的闭式最优功率分配方案。研究了一种频率选择性衰落多输入多输出信道。通过求解约束优化问题，得到了分集和复用情况下协调传输的总速率容量和最优功率分配的封闭解。通过将所提出的最优功率分配方案与其他两种典型的功率分配方案进行比较，通过数值仿真验证了所得理论结论。一种是传统充水与等功率相结合的功率分配方案（WS-EF PA）。另一种是均权分配（EPA）方案。
Coordinated transmission in multicell coordination networks has attracted much attentions in recent years. In the paper, we investigate one open problem in the above area, which is concerned with how to solve the closed-form optimal power allocation scheme of coordinated transmission in downlink orthogonal frequencydivision multiplexing (OFDM) systems with multiple antenna configurations and individual power constraints. A frequency-selective fading multiple-input multiple-output (MIMO) channel is considered. We derive the closed-form solutions of sum-rate capacity and optimal power allocations for coordinated transmission under the diversity case and the multiplexing case by solving the constrained optimization problems. Numerical simulations are performed to verify the derived theoretical conclusions by means of comparing the proposed optimal power allocation (OPA) scheme with the other two typical power allocation schemes. One is the power allocation scheme combining traditional water-filling with equal power (WS-EF PA). The other is equal power allocation (EPA) scheme.
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DOI：
10.1109/t-wc.2008.061110
发表时间：
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期刊：
2007 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks
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