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空時分組編碼多載波碼分多址系統(tǒng)的直接解碼

曾雁星,  殷勤業(yè),  張一聞,  羅銘

曾雁星, 殷勤業(yè), 張一聞, 羅銘. 空時分組編碼多載波碼分多址系統(tǒng)的直接解碼[J]. 電子與信息學報, 2005, 27(8): 1258-1263.
引用本文: 曾雁星, 殷勤業(yè), 張一聞, 羅銘. 空時分組編碼多載波碼分多址系統(tǒng)的直接解碼[J]. 電子與信息學報, 2005, 27(8): 1258-1263.
Ceng Yan-xng, Yan Qin-ye, Zhang Yi-wen, Luo Ming. Direct Decoding for Space-Time Block Coded MC-CDMA Systems[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1258-1263.
Citation: Ceng Yan-xng, Yan Qin-ye, Zhang Yi-wen, Luo Ming. Direct Decoding for Space-Time Block Coded MC-CDMA Systems[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1258-1263.

空時分組編碼多載波碼分多址系統(tǒng)的直接解碼

Direct Decoding for Space-Time Block Coded MC-CDMA Systems

  • 摘要: 針對宏蜂窩小區(qū)中基站使用均勻線陣空時分組編碼多載波碼分多址系統(tǒng)的上行物理鏈路,該文提出了一種無需信道估計,直接對多個用戶的發(fā)射符號和波達方向進行盲估計的算法.該算法通過構筑蘊涵用戶編碼符號序列和波達方向的輔助矩陣,對其進行特征分解,得到了每個用戶波達方向的閉式解.進而,利用空時分組碼的正交結構以及發(fā)射符號的有限碼集特性給出了所有活動用戶原始符號序列的閉式估計.計算機仿真實驗驗證了該算法的有效性.
    Abstract: The uplink of a space-time block coded MC-CDMA system equipped with a uniform linear array at the base station of macrocellular is studied. A blind estimation algorithm is proposed to provide the closed-form solutions of both the transmitted symbol sequences and the Directions Of Arrival （DOA） for multiple users without determining the space-time vector channels. An auxiliary matrix including both the coded symbol sequences and DOAs is derived, on which the eigen decomposition is performed to obtain the DOAs of different users. Then, the algorithm exploits the structure of space-time block coding in combination with the finite alphabet property of transmitted symbols to estimate the original symbol sequences for all active users. The computer simulations demonstrate the effectiveness of the proposed scheme.
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  • Tarokh V, Jafarkhani H, Calderbank A R. Space-time block codes from orthogonal designs[J].IEEE Trans. on Info. Theory.1999,45(5):1456-[2]Li J, Letaief K B, Cao Z. Co-channel interference cancellation for space-time coded OFDM systems. IEEE Trans. on Wireless Commun. 2003, 2(1): 41 - 49.[3]Hu X Y, Chew Y H. Performance of space-time block coded MC-CDMA system over frequency selective fading channel using semi-blind channel estimation technique. Proc. IEEE WCNC2003, New Orleans, USA, Mar 2003, vol. 1: 414 - 419.[4]Liu H, Xu G. A subspace method for signature waveform estimation in synchronous CDMA systems[J].IEEE Trans. on Commun.1996, 44(10):1346-[5]Liu H, Xu G. Closed-form blind symbol estimation in digital communications[J].IEEE Trans. on Signal Processing.1995, 43(11):2714-[6]Swindlehurst A, Leus G. Blind and semi-blind equalization for generalized space-time block codes[J].IEEE Trans. on Signal Processing.2002, 50(10):2489-[7]Swindlehurst A. Blind separation of space-time block coded signals via the analytic constant modulus algorithm. Proc. Sensor Array and Multichannel Signal Processing Workshop 2002, New York, USA, Aug. 2002:447 - 451.[8]殷勤業(yè),鄒理和,Newcomb R W.一種高分辨率二維信號參數估計方法--波達方向矩陣法.通信學報,1991,12(4):1-7.[9]McCormick A, Grant P. Hybrid uplink multi-carrier CDMA interference cancellation receiver[J].IEE Proc.-Commun.2001,148(2):119-[10]Wang Z, Giannakis G. Wireless multicarrier communications[J].IEEE Signal Processing Mag.2000, 17(5):29-[11]Zeng Y, Yin Q. Direct decoding ofuplink space-time block coded multicarrier code division multiple access systems. Proc. IEEE ICC 2004, Paris, France, June 2004, vol. 1: 226 - 230.[12]Z. Zhao, Q.Y. Yin, H. Zhang. Decoding of full rate space-time block code without channel state information in frequency selective fading channels, Proc. IEEE ICASSP 2003, Hong Kong,May 2003, vol.5:121 - 124.
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出版歷程
  • 收稿日期:  2004-02-27
  • 修回日期:  2004-06-22
  • 刊出日期:  2005-08-19

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