| 摘要: |
| 针对多输入多输出（MIMO）系统信道不匹配造成的系统性能受损问题，结合二阶锥规划约束最优化理论，提出了一种二阶锥条件约束的盲源分离算法，用于提高信道不匹配条件下的MIMO系统性能。该算法首先利用信道不匹配问题得到的二阶锥约束条件与负熵最大化的独立分量分析形成一个约束的最优化代价函数;其次，约束的代价函数借助牛顿迭代原则最优化得到分离向量。仿真分析验证了该算法在信道不匹配条件下可以有效提升MIMO系统的性能。 |
| 关键词: MIMO 信道不匹配；盲源分离；独立分量分析；二阶锥规划 |
| DOI： |
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| 基金项目:国家自然科学基金青年科学基金项目（61801319）；四川省教育厅项目(18ZB0419)；人工智能四川省重点实验室开放基金项目（2017RZJ01）；企业信息化与物联网测控技术四川省高校重点实验室开放基金项目（2017WZJ01）；四川理工学院人才引进项目（2017RCL11） |
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| A blind separation method for overcoming channel mismatch based on second-order cone constraint |
| LUO Zhongqiang,XIE Wei,LI Chengjie |
| (Artificial Intelligence Key Laboratory of Sichuan Province,Sichuan University of Science and Engineering,
Zigong 643000,China;School of Computer Science and Technology,Southwest Minzu University，Chengdu 610255,China) |
| Abstract: |
| In terms of the damaged performance problem of Multiple-Input Multiple-Output(MIMO) systems due to channel mismatch,a blind source separation method subject to second-order cone constraint is proposed to improve the system performance of MIMO systems.Firstly,the constrained cost function is constructed according to approximate negentropy maximization subject to second-order cone constraint with the channel mismatch problem.Then,the resulting cost function is optimized by using qusi-Newton iterative methods.Simulation results illuminate that the proposed algorithm can effectively improve the performance of the MIMO system under the condition of channel mismatch. |
| Key words: multiple-input multiple-output（MIMO） channel mismatch blind source separation independent component analysis second-order cone programming |
