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有限反馈MISO-OFDM系统中基于误码率的波束成形 被引量:2

BER Based Transmit Beamforming for MISO-OFDM with Limited Feedback
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摘要 该文提出了一种在有限反馈条件下多入单出–正交频分复用(MISO-OFDM)系统中基于误码率的波束成形方案。将OFDM符号的所有子载波分成若干簇,从码本中选择能够最小化该簇每个子载波的平均误码率的码字,作为该簇的波束成形向量。此方案既能降低反馈量,又能取得较低误码率。同时,为避免所提方案中探求最优解时的穷尽搜索,还基于簇内不同子载波信道频响之间的相关性提出了一种简化的次优算法。仿真结果表明,在典型参数设置下,所提方案能够以较低计算复杂度取得比其他已有方案更好的误码率性能。 In this paper, a new transmit beamforming scheme with limited feedback is presented in Multiple-Input Single-Output Orthogonal Frequency Division Multiplexing (MISO-OFDM) systems. By dividing the total subcarriers of an OFDM symbol into a series of clusters, from the codebook a "proper" one minimizing the average Bit Error Rate (BER) per subcarrier of the considered cluster is chosen as the beamforming vector for this cluster. "The scheme can reduce the feedback overhead remarkably while obtain good BER performance. Additionally, a simple sub-optimal algorithm based on the correlation of subcarriers is proposed to avoid exhaustive search in the optimal solution. The simulation results show that the proposed algorithm, with low computational complexity, provides improvement over existing schemes.
出处 《电子与信息学报》 EI CSCD 北大核心 2009年第3期752-755,共4页 Journal of Electronics & Information Technology
基金 国家自然科学基金(60702073)资助课题
关键词 多入单出–正交频分复用 有限反馈 波束成形 误码率 MISO-OFDM Limited feedback Beamforming Bit Error Rate (BER)
作者简介 张雷:男,1979年生,博士生,研究方向为无线通信中的空时编码、多天线信号处理与正交频分复用技术. 武刚:男,1975年生,博士,副教授,硕士生导师,研究方向为无线通信中的空时编码、多天线信号处理、正交频分复用技术与超宽带通信技术. 李少谦:男,1957年生,教授,博士生导师,主要研究方向为无线与移动通信技术、抗干扰通信技术.
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同被引文献9

  • 1Love D J,Heath R W,Lau V K N,et al.An overview of limited feedback in wireless communication systems[J]. IEEE Journal on Selected Areas in Communications, 2008,26(8) : 1341-1365.
  • 2Zheng J,Rao B D.Capacity analysis of MIMO systems using limited feedback transmit precoding schemes[J]. IEEE Transactions on Signal Processing, 2008, 56(7): 2886-2901.
  • 3Love D J,Heath R W,Strohmer T.Grassmannian beam- forming for multiple-input multiple-output wireless sys- tems[J].IEEE Transactions on Information Theory,2003, 49(10) :2735-2747.
  • 4Love D J, Heath R W.Limited feedback unitary precod- ing for spatial multiplexing systems[J].IEEE Transac- tions on Information Theory, 2005,51 (8) : 2967-2976.
  • 5Jihoon Choi, Mondal B, Heath R W.Interpolation based unitary precoding for spatial multiplexing MIMO-OFDM with limited feedback[J].IEEE Transactions on Signal Processing, 2006,54 (12) : 4730-4740.
  • 6Lau V K N.Optimal transmission and limited feedbackdesign for OFDM/MIMO systems in frequency selec- tive block fading channels[J].IEEE Transactions on Wire- less Communications, 2007,6 (5) : 1569-1573.
  • 7Merli F Z,Wang Xiaodong,Vitetta G M.Low-rate-feed- back-assisted beamforming and power control for MI- MO-OFDM systems[J].IEEE Transactions on Vehicular Technology, 2010,59 ( 1 ) : 225-234.
  • 8刘建国,杨绿溪.有限反馈MIMO系统中一种基于双码本的功率分配与预编码方案[J].电子学报,2007,35(B06):78-82. 被引量:6
  • 9张雷,武刚,李少谦.有限反馈MISO-OFDM系统中最大化容量的波束成形[J].电子与信息学报,2009,31(7):1542-1547. 被引量:1

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