Advanced Search
Volume 32 Issue 5
May  2010
Turn off MathJax
Article Contents
Xu Peng, Wang Jin-kuan, Qi Feng. An Effective MAP Channel Estimation for MIMO-OFDM Systems[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1163-1167. doi: 10.3724/SP.J.1146.2009.00614
Citation: Xu Peng, Wang Jin-kuan, Qi Feng. An Effective MAP Channel Estimation for MIMO-OFDM Systems[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1163-1167. doi: 10.3724/SP.J.1146.2009.00614

An Effective MAP Channel Estimation for MIMO-OFDM Systems

doi: 10.3724/SP.J.1146.2009.00614
  • Received Date: 2009-04-24
  • Rev Recd Date: 2009-11-23
  • Publish Date: 2010-05-19
  • For Multiple-Input Multiple-Output with Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, Maximum A posteriori Probability (MAP) channel estimation algorithm uses expectation maximum (EM) algorithm to reduce complexity, but it will lead to error floor phenomenon. The data transmission efficiency of systems is subject to the number of transmit antennas. According to these problems, in this paper, an effective MAP algorithm is proposed and its performance is analyzed. The proposed algorithm lowers the estimated error depending on the spatial independence of MIMO channels in angle domain on the basis of making use of EM algorithm to decrease the complexity. To improve the data transmission efficiency and the performance of estimation, joint estimation is carried out over multiple OFDM symbols. Simulation results indicate the proposed algorithm obtains better estimated performance and higher data transmission efficiency.
  • loading
  • Foschini G J and Gans M J. On limits of wireless communications in a fading environment when using multiple antennas [J]. IEEE Transactions on Wireless Communication, 1998, 6(3): 311-335.[2]王晗, 汪晋宽. MIMO-OFDM系统信道估计中的最优导频设计[J]. 电波科学学报,2008, 23(3): 501-505.Wang H and Wang J K. Optimal pilot tone design in MIMO-OFDM systems [J]. Chinese Journal of Radio Science, 2008, 23(3): 501-505.[3]喻华文, 尹俊勋,赖国庭. 基于分群子载波空时频MIMO- OFDM信道估计 [J].电子与信息学报.2008, 30(1):55-58浏览Yu H W, Yin J X, and Lai G T. Space-time-frequency coded MIMO-OFDM channel estimation based on subcarrier grouping [J].Journal of Electronics Information Technology.2008, 30(1):55-58[4]许国平, 张欣, 杨大成. 一种低复杂度的MIMO-OFDM信道估计新方法.电子与信息学报. 2008, 30(4): 797-800.[5]Xu G P, Zhang X, and Yang D C. New MIMO-OFDM channel estimation algorithm with low complexity [J].Journal of Electronics Information Technology.2008, 30(4):797-800[6]Deneire L, Vandenameele P, and van der Perre L, et al.. A low-complexity ML channel estimator for OFDM[J].IEEE Transactions on Communications.2003, 51(2):135-140[7]Xie Y and Georghiades C N. Two EM-type channel estimation algorithm for OFDM with transmitter diversity [J].IEEE Transactions on Communications.2003, 51(10):106-115[8]Barhumi I, Leus G, and Moonen M. Optimal training design for MIMO OFDM systems in mobile wireless channels[J].IEEE Transactions on Signal Processing.2003, 51(6):1615-1624[9]Huang L, Ho C K, and Bergmans J W M, et al.. Pilot-aided angle-domain channel estimation techniques for MIMO- OFDM systems [J].IEEE Transactions on Vehicular Technology.2008, 57(2):906-920[10]Deng X, Haimovich A M, and Garcia-Frias J. Decision directed iterative channel estimation for MIMO systems [C][J].Proc. IEEE ICC 03, Alaska, USA, May.2003, Vol. 4:2326-2329[11]Gao J and Liu H. Low-complexity map channel estimation for mobile MIMO-OFDM systems [J].IEEE Transactions on Wireless Communications.2008, 7(3):774-780
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (4133) PDF downloads(969) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return