基于最小均方误差准则的盲多用户检测新算法
A New MMSE Approach to Blind Multiuser Detection
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摘要: 码分多址信号在无线多径衰落信道条件下的盲多用户检测具有很大的理论和实际意义。该文提出了一种直接基于最小均方误差(MMSE)准则的盲多用户检测算法。为保证算法收敛到目标用户，提出了一种基于MMSE准则的新的线性约束方法。该方法能保证检测器收敛到最优MMSE解。此外，该文还设计了一种形式简单、快速收敛的迭代算法。对比现有的最小输出能量(MOE)算法，仿真结果表明本文算法具有较好的性能。
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关键词:
- 最小均方误差; 线性约束; 盲多用户检测
Abstract: Blind multiuser detection in multipath fading channel is an interesting topic in code division multiple access systems. In this paper a blind adaptive multiuser detector based on Minimum Mean Square Error (MMSE) criterion is proposed. In order to guarantee that the algorithm converges to the desired user, a new linear constraint technique that limits the searching space is developed. The new constraint can guarantee that the algorithm converges to the global MMSE optimal solution. Besides, an efficient iterative implementation that provides very fast convergence is proposed. Simulation results show the efficiency of the proposed algorithm. -
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