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多天线对角空频编码传输 被引量：2

Multiple-antenna diagonal space-frequency coding signaling
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摘要 将平坦衰落信道的对角代数空时码(ＤＡＳＴ)推广到频率选择性衰落信道,提出了对角空频分组码(ＤＳＦ)。基于多输入多输出天线和正交频分复用(ＯＦＤＭ),ＤＳＦ码将满秩的旋转信号星座和子载波分组结合起来,以对角发送方式(每时刻只有一个天线发射)发射旋转信息符号向量的每个分量。成对错误概率分析表明:在频率选择性信道中,通过选择最佳的旋转矩阵,这种ＤＳＦ ＯＦＤＭ系统能实现满分集增益和最大的编码增益。系统采用了球型解码器对ＤＳＦ码实施最大似然解码,它的解码复杂性是中等的,并且,解码算法的复杂性与信号星座的维数无关。码复杂性是中等的,并且,解码算法的复杂性与信号星座的维数无关。此外,和先前所提出的一些方法相比,提出的空频码还具有频谱效率高的性能特点。 This paper generalizes diagonal algebraic space-time block codes over flat fading channel to frequency-selective fading channel and proposes a diagonal space frequency (DSF) block codes. Based on multiple-input and multiple-output (MIMO) together with orthogonal frequency-division multiplexing (OFDM), the DSF codes are constructed by the combination of rotated constellations having full modulation diversity and subchannel grouping. The system sends the components of a rotated version of the information symbol vector over NT transmit antennas in diagonal form (only one antenna transmits at any given time). By analyzing the pairwise error probability (PEP), we prove that the DSF-OFDM system can achieve full diversity gain and maximum coding gain over frequency-selective fading channel by choosing optimum rotation matrix. The maximum-likelihood (ML) decoding of the proposed codes can be implemented by the sphere decoder at a moderate complexity and the complexity of the decoding algorithm is independent of signal constellation size. Compared with previous schemes, moreover, using the proposed space-frequency code yields better performance with high spectral efficiency.
作者 宋高俊 周正中 钟俊
机构地区 安徽理工大学电子工程系 电子科技大学通信与信息工程学院
出处 《电波科学学报》 EI CSCD 北大核心 2005年第1期132-136,共5页 Chinese Journal of Radio Science
关键词 分集 对角空时分组码 对角空频分组码 频率选择性衰落信道 MIMOI OFDM系统 Antennas Channel capacity Diversity reception Encoding (symbols) Frequencies Maximum likelihood estimation Orthogonal frequency division multiplexing
分类号 TN914 [电子电信—通信与信息系统]
  • 相关文献

参考文献8

  • 1罗微,李少谦,吴诗其,邵怀宗.瑞利衰落下的空时频 (STF)分组编码OFDM系统[J].电波科学学报,2003,18(5):502-508. 被引量：6
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二级参考文献13

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  • 8Z Liu, Y Xin, and G B Giannakis. Linear constellation precoding for OFDM with maximum multipath diversity and coding gains,[J].in Proc of 35th Asilomar Conf , Pacific Grove, CA, Nov. 4-7, 2001,2:1445-1449.
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共引文献5

同被引文献10

  • 1宋高俊,周正中,钟俊.一种多符号网格码与差分空时分组码级连方法[J].信号处理,2004,20(4):360-364. 被引量：2
  • 2X Ma and G B Giannakis. Full-diversity Full-rate complex-field space-time coding [J]. IEEE. Trans. Signal Processing , 2003, 51(11):2917-2930.
  • 3S Thoen, L Perre,B Gyselinckx, et al.. Performance analysis of combined transmit-SC/receive-MRC [J].IEEE Trans. Commun. 2001, 49(1): 5-8.
  • 4Z Chen, B Vucetic, J Yuan ,etal.. Analysis of transmit antenna selection/Maximal-ratio combining in rayleigh fading channels[C], in Proc. IEEE ISTT03, Yokohama, Japan, 2003: 94.
  • 5I Bahceci, T M Duman, and Y Ahunbasak. Antenna selection for multiple antenna transmission systems:performance analysis and code construction[J]. IEEE Trans. Information Theory, 2003, 49(10): 2669-2881.
  • 6X Cai, and G B Giannakis. Performance analysis of combined transmit selection diversity and receive generalized selection combining in rayleigh fading channels[J]. IEEE Trans. Wireless communication , 2004,3(6) : 1980-1983.
  • 7D A Gore and A J Paulraj . MIMO antenna subset selection with space-time coding [J]. IEEE. Trans. Signal Processing , 2002, 50(10): 2580-2588.
  • 8V Tarokh and H Jafarkhani. A differential detection scheme for transmit diversity[J]. IEEE J. Select. Areas Commun. , 2000, 18(7): 1169-1174.
  • 9N Kong and L B Milstein. Average SNR of a generalized diversity selection combining scheme [J]. IEEE Communications Letters, 1999, 3(3) : 57-59.
  • 10W Zhengdao and G B Giannakis. A simple and general parameterization quantifying performance in fading channels [J]. IEEE Trans. Commun. 2003, 51(8):1389-1398.

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电波科学学报
2005年 第1期

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