| VBLAST-OFDM系统中改进的QR分解检测算法 |
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| 引用本文： | 傅洪亮,李永杰,张元,管爱红.VBLAST-OFDM系统中改进的QR分解检测算法[J].数据采集与处理,2011,26(1). |
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| 作者姓名： | 傅洪亮 李永杰 张元 管爱红 |
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| 作者单位： | 1. 河南工业大学信息科学与工程学院,郑州,450001
2. 河南工业大学信息科学与工程学院,郑州,450001;南京邮电大学通信与信息工程学院,南京,210003 |
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| 基金项目： | 国家自然科学基金(60940017)资助项目; 国家科技支撑计划(2006BAD08B01)资助项目; 河南省科技创新杰出青年基金(104100510008)资助项目 |
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| 摘 要： | 基于VBLAST-OFDM系统中传统QR分解算法,将最大似然和并行干扰消除的思想引入QR分解算法中,提出了对QR分解算法的改进方法,克服了传统QR分解算法检测性能差的缺点,运用QR分解从最后两层信号开始,等效为2收2发的MIMO系统。用最优算法检测判决后,回代到原QR分解算法检测余下层信号;或者依次并行消除已判决信号的影响,再进行下个等效MIMO系统的判决,直至所有信号检测完毕。仿真结果表明,本文改进的QR分解检测算法比传统的QR算法和迫零算法在误码性能上得到改善。
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| 关 键 词： | 垂直分层空时码 OFDM QR分解 QRMLPIC |
Improved QR Factorization Detection Algorithm for VBLAST-OFDM System |
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| Fu Hongliang,Li Yongjie,Zhang Yuan,Guan Aihong.Improved QR Factorization Detection Algorithm for VBLAST-OFDM System[J].Journal of Data Acquisition & Processing,2011,26(1). |
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| Authors: | Fu Hongliang Li Yongjie Zhang Yuan Guan Aihong |
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| Affiliation: | Fu Hongliang1,Li Yongjie1,2,Zhang Yuan1,Guan Aihong 1(1.Institute of Information Science & Engineering,Henan University of Technology,Zhengzhou,450001,China,2.College of Telecommunications & Information Engineering,Nanjing University of Posts andTelecommunications,Nanjing,210003,China) |
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| Abstract: | The improved detection algorithms of VBLAST-OFDM based on QR factorization are proposed.To overcome the disadvantage of the poor performance of the first detected layer in QR algorithm,the maximum likelihood(ML) detection and the parallel interference cancellation are applied to the QR factorization algorithm.The signals of the last two layers are detected by using the optimal algorithm in the(2,2) MIMO equivalent system,the signals of the other layers are detected by the back substitution of the detected s... |
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| Keywords: | VBLAST OFDM QR factorization QRMLPIC |
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