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A general scheme for equalization of space-time block-coded systems with unknown CSI

Ding, Z. and Ward, D. and Chin, W. (2006) A general scheme for equalization of space-time block-coded systems with unknown CSI. IEEE Transactions on Signal Processing, 54 (7). pp. 2737-2746. ISSN 1053-587X

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Abstract

Recently, space-time block codes (STBCs) have gained much attention as an effective transmit diversity technique to increase the capacity of wireless communication systems. In this paper, we consider a general technique for direct equalization of space-time block-coding systems with unknown channel state information (CSI). This technique is suitable for several existing hybrid STBC schemes, such as STBC/orthogonal-frequency-division multiplexing (STBC-OFDM) and STBC/code-division multiple access (STBC-CDMA). We show that by exploiting the redundancy in the structure of STBC, a zero-forcing equalizer can be constructed without channel estimation. The conditions for the identifiability of the zero-forcing equalizer are also derived to ensure correct equalization. To further improve the performance of the proposed method, a new iterative algorithm is developed by incorporating the finite alphabet property of information symbols. Simulation results show that the proposed algorithms can outperform comparative schemes in most simulation conditions.

Item Type: Article
Journal or Publication Title: IEEE Transactions on Signal Processing
Uncontrolled Keywords: DCS-publications-id ; art-909 ; DCS-publications-credits ; coding-fa ; DCS-publications-personnel-id ; 147
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 990
Deposited By: Dr Zhiguo Ding
Deposited On: 18 Jan 2008 16:54
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:42
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/990

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