功率约束条件下MIMO-OFDM下行广播信道自适应资源分配
doi: 10.3724/SP.J.1146.2006.01621
Transmission Strategy and Power Allocation for MIMO-OFDM Broadcast Channels with Power-limited Constraints
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摘要: 该文分析了功率约束条件下MIMO-OFDM系统广播信道的发送优化问题，提出了两种不同准则下的多用户传输策略和功率分配方案，即最优空间距离OSD-DPC(Optimal Space Distance Dirty Paper Coding)方案和最大化信噪比波束成形MSNR-DPC(Max Signal to Noise Ratio Dirty Paper Coding)方案。数据结果表明，两种传输策略与理论上的最优传输方案性能非常接近，可以显著提高功率约束条件下的系统性能与容量。Abstract: Transmission optimization for Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) broadcast channel with power-limited constraints is analyzed in this paper. Applying different optimization rules, two different transmission strategies are proposed. One is Optimal Space Distance Dirty Paper Coding(OSD-DPC), the other is Max Signal to Noise Ratio Dirty Paper Coding (MSNR-DPC). Numerical results show that proposed schemes have the similar performance to the optimal schemes and are capable of improving the system capacity and performance with power-limited constraints.
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