| SC-FDE系统的一种新型判决反馈均衡器 |
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| 引用本文： | 杨志,刘泽民.SC-FDE系统的一种新型判决反馈均衡器[J].半导体技术,2007,32(9):800-803. |
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| 作者姓名： | 杨志 刘泽民 |
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| 作者单位： | 北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876 |
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| 摘 要： | 针对单载波频域均衡系统MMSE均衡器存在残留码间干扰的缺点,提出MMSE-RISIC判决反馈均衡器消除残留码间干扰.MMSE-RISIC均衡器采用传统MMSE均衡后的判决数据,对残留码间干扰进行估计并消除.残留码间干扰的估计主要采用FFT和IFFT运算,与其他方法相比计算量较小.对该均衡器在不同信道下进行了计算机仿真,结果表明,在频率选择性衰落信道条件下,系统性能有了较为明显的提高.
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| 关 键 词： | 单载波频域均衡 MMSE均衡器 残留码间干扰 频率选择性衰落信道 |
| 文章编号： | 1003-353X（2007）09-0800-04 |
| 修稿时间： | 2007-04-16 |
A Novel Decision Feedback Equalizer for SC-FDE System |
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| YANG Zhi,LIU Ze-min.A Novel Decision Feedback Equalizer for SC-FDE System[J].Semiconductor Technology,2007,32(9):800-803. |
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| Authors: | YANG Zhi LIU Ze-min |
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| Affiliation: | School of Telecommunications Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | Residual inter-symbol interference(ISI) is the main disadvantage of MMSE equalizer for single carrier frequency domain equalization(SC-FDE) system,so a MMSE(minimum mean-square-error)-RISIC(residual ISI cancellation)decision feedback equalizer was presented for SC-FDE system to eliminate the residual ISI.The MMSE-RISIC equalizer used decisions,acquired from MMSE equalization,to estimate and remove the residual ISI.The computational complexity was very low because only FFT and IFFT were used in the residual ISI estimation.The effect of the equalizer was evaluated in the condition of different channels.Simulation results show that higher performance can be achieved on frequency selective fading channel. |
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| Keywords: | single carrier frequency domain equalization(SC-FDE) MMSE equalizer residual inter-symbol interference(ISI) frequency selective fading channel |
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