| 多用户MIMO下行链路中线性预编码器和译码器的联合优化 |
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| 引用本文： | 李昊,徐昌庆. 多用户MIMO下行链路中线性预编码器和译码器的联合优化[J]. 通信技术, 2009, 42(2): 1-3 |
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| 作者姓名： | 李昊 徐昌庆 |
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| 作者单位： | 上海交通大学电子工程系,上海,200240 |
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| 摘 要： | 文章研究多用户MIMO下行链路中线性预编码器和译码器的联合优化问题。采用的优化准则是在总发射功率约束下最小化系统的和均方误差（Sum MSE，SMSE），提出了一种启发式的迭代算法。通过在接收端引入相同的自动增益控制因子，该算法对预编码器和译码器进行交替优化，直到SMSE达到最小值。分析和仿真结果表明：该算法具有较低的复杂度和良好的收敛特性，符号差错率也优于现有算法。
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| 关 键 词： | MIMO MIMO下行链路 线性预编码/译码 和均方误差(SMSE) |
Joint Optimization of Linear Precoders and Decoders for Multiuser MIMO Downlink |
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| LI Hao,XU Chang-qing. Joint Optimization of Linear Precoders and Decoders for Multiuser MIMO Downlink[J]. Communications Technology, 2009, 42(2): 1-3 |
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| Authors: | LI Hao XU Chang-qing |
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| Affiliation: | (Dept. of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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| Abstract: | This paper deals with the joint optimization of linear precoders and decoders for multiuser MIMO downlinks. The adopted criterion is to minimize the sum MSE （SMSE） of the system subject toatotal transmit power constraint. A heuristic algorithm based on iteration is proposed. By introducing a common auto gain controlling factor at receivers, this algorithm alternately optimizes the precoders and decoders until the SMSE is minimized. Analysis and simulations indicate that the proposed algorithm has low complexity and a perfect convergence property and its symbol error ratio （SEN） is better than the existing algorithms. |
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| Keywords: | MIMO MIMO downl ink Linear precoding/decoding： Sum MSE （SMSE） |
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