| 快时变信道下基于LSQR算法的ICI均衡 |
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| 引用本文： | 韩华,吴乐南.快时变信道下基于LSQR算法的ICI均衡[J].东南大学学报(自然科学版),2010,40(2). |
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| 作者姓名： | 韩华 吴乐南 |
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| 作者单位： | 东南大学信息科学与工程学院,南京,210096 |
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| 基金项目： | 国家自然科学基金资助项目(60872075);;国家高技术研究发展计划(863计划)资助项目(2008AA01Z227) |
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| 摘 要： | 为了尽量消除正交频分复用(OFDM)系统中由于信道快时变导致的子载波间干扰(ICI),确保快时变信道下的可靠通信,提出了一种低复杂度LSQR(least square QR)判决反馈均衡器(DFE).该均衡算法充分利用了带状矩阵特性和时域LSQR迭代计算的特点,在计算复杂度和性能之间取得了良好的折中.仿真结果表明,在快时变信道下与已有的块判决反馈均衡(BDFE)算法比较,在计算复杂度相当的条件下,所提出的算法可有效改善带状矩阵近似误差导致的性能损耗,在高信噪比情况下有效地克服了"地板效应",在保持低复杂度的同时获得了更好的性能.
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| 关 键 词： | 正交频分复用 载波间干扰 判决反馈均衡器 快时变信道 |
LSQR-based ICI equalization over rapidly time-varying channels |
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| Han Hua Wu Lenan.LSQR-based ICI equalization over rapidly time-varying channels[J].Journal of Southeast University(Natural Science Edition),2010,40(2). |
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| Authors: | Han Hua Wu Lenan |
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| Institution: | School of Information Science and Engineering;Southeast University;Nanjing 210096;China |
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| Abstract: | A novel low complexity least square QR decision feedback equalizer(LSQR-DFE) is proposed in order to eliminate inter-carrier interference(ICI) caused by rapidly time-varying channels and to enable reliable communications over rapidly time-varying channels in orthogonal frequency division multiplexing(OFDM) systems.The proposed equalization algorithm obtains a tradeoff between computations and performance by exploiting banded matrix properties and time-domain LSQR iterative computation.Compared with existing... |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) inter-carrier interference (ICI) decision feedback equalizer(DFE) rapidly time-varying channels |
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