| 摘要: |
| 在MIMO空时编码系统中寻求一种有效的抑制等信道干扰（CCI）的方法是无线通信系统中的关键。基于最小均方差（MMSE）的软干扰消除Turbo均衡器能有效地消除系统共信道干扰与多用户干扰，在频率选择信道下的是一种非常有效的均衡接收技术。它在多天线系统中应用时，需要通过MMSE的方法得到优化的滤波系数；但在不同的约束条件下，会得到不同的滤波系数。本文比较研究了不同的约束方法对系统性能的影响。通过仿真得出了发射天线约束对系统性能起主要作用的结论。 |
| 关键词: 多入多出系统 Turbo均衡 空时码 最小均方差 空时约束 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:November 10, 2004Revised:January 17, 2005 |
| 基金项目: |
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| Impacts of Different Constraints on the Performance of MMSE Soft-cancellation Turbo Equalizer |
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| Abstract: |
| The Turbo equalization with MMSE soft-cancellation can eliminate co-channel interference(CCI) and multiuser interference, which is an important technique for frequency selective fading channel and need obtain filter coefficients by minimum-mean-squared-error (MMSE) for multi-antenna transmit systems, but there are different coefficients with different constraints with space and time variable. The performances of system with different constraints are compared in this paper by simulation. It is pointed out that constraint for transmit antennas mainly functions on system performance. |
| Key words: MIMO system Turbo equalization space - time codes MMSE space time constraint |
