| MIMO-MC-CDMA系统分层空时非线性预编码 |
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| 引用本文： | 傅洪亮,陶勇,张元.MIMO-MC-CDMA系统分层空时非线性预编码[J].计算机工程与应用,2011,47(2):88-90. |
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| 作者姓名： | 傅洪亮 陶勇 张元 |
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| 作者单位： | 河南工业大学 信息科学与工程学院，郑州 450001 |
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| 基金项目： | 国家自然科学基金，河南省科技创新杰出青年基金 |
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| 摘 要： | 针对垂直分层空时方案（VBLAST）传统检测存在误层传输效应及复杂度高的问题，提出了一种多用户MIMO-MC-CDMA下行链路系统中基于QR分解的VBLAST非线性模代数预编码算法，该算法首先采用QR分解获得预编码矩阵，然后在发射端MC-CDMA子载波信道间进行非线性模代数THP预编码，可以有效地消除分层空时码的误层传输效应。在接收端采用迫零与最小均方误差准则，降低了下行接收机的复杂度。仿真结果表明，提出的算法比传统检测算法有效改善了系统的误码性能。
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| 关 键 词： | 多输入多输出 多载波码分多址 垂直分层空时码 QR分解 模代数 |
| 收稿时间： | 2010-5-10 |
| 修稿时间： | 2010-8-2
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Nonlinear precoding for VBLAST in MIMO-MC-CDMA systems |
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| FU Hongliang,TAO Yong,ZHANG Yuan.Nonlinear precoding for VBLAST in MIMO-MC-CDMA systems[J].Computer Engineering and Applications,2011,47(2):88-90. |
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| Authors: | FU Hongliang TAO Yong ZHANG Yuan |
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| Affiliation: | Institute of Information Science and Engineering，Henan University of Technology，Zhengzhou 450001，China |
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| Abstract: | Considering the error propagation effect and high complexity of vertical bell labs layered space time codes,a novel nonlinear module algebra precoding algorithm based on QR decomposition for VBLAST in multi-user MIMO-MC-CDMA downlink system is proposed,QR decomposition is used for precoding matrix,the nonlinear module algebra THP precoding is used between sub-carrier channels of MC-CDMA to eliminate interference from other signals at the transmitter,and can eliminate the error propagation effect of layered space-time codes effectively.At the receiver,ZF and MMSE criterion are used for detection,and the complexity of the downlink receiver can be reduced.Simulation results show that the proposed algorithm is better than the traditional algorithms in the system BER performance. |
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| Keywords: | Multiple Input Multiple Outpu（tMIMO） Multi-Carrier Code Division Multiple Access（MC-CDMA） vertical bell labs layered space time codes QR decomposition module algebra |
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