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MMSE DFE Transceiver Design Over Slowly Time-Varying MIMO Channels Using ST-GTD

Liu, Chih-Hao and Vaidyanathan, P. P. (2011) MMSE DFE Transceiver Design Over Slowly Time-Varying MIMO Channels Using ST-GTD. IEEE Transactions on Signal Processing, 59 (1). pp. 277-289. ISSN 1053-587X.

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In a companion paper, we have studied the zero-forcing (ZF) transceiver with decision feedback equalizer (DFE) over slowly time-varying narrowband multiinput multioutput (MIMO) channels. The space-time generalized triangular decomposition (ST-GTD) was used for the design of ZF-DFE transceivers. The space-time geometric mean decomposition (ST-GMD) ZF transceiver minimizes both the arithmetic mean square error (MSE) at the feedback detector and the average uncoded bit error rate (BER) in moderate high signal-to-noise ratio (SNR). This paper addresses the design problem of DFE transceiver without zero-forcing constraint. In the first part, a channel independent temporal precoder is superimposed on the conventional block-wise GMD-based minimum mean square error (MMSE) DFE transceiver to take advantage of the temporal diversity. In the second part, ST-GTD is applied for the design of MMSE DFE transceivers. With accurate channel prediction and space-time powerloading, the proposed ST-GMD MMSE transceiver minimizes the arithmetic MSE at the feedack detector, and maximizes Gaussian mutual information. For practical applications, the ST-GTD MMSE transceiver which does not require channel prediction but shares the same asymptotic BER performance with the ST-GMD MMSE system is also developed. In the convex region, our analysis shows that the proposed MMSE transceivers has better BER performance than the conventional GMD-based MMSE transceiver; the average BERs of the proposed systems are nonincreasing functions of the ST-block size. The superior performance of ST-GMD MMSE transceiver over the ST-GMD ZF transceiver is also verified analytically.

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Additional Information:© 2010 IEEE. Manuscript received June 28, 2010; accepted October 03, 2010. Date of publication October 14, 2010; date of current version December 17, 2010. This work was supported in part by the ONR by Grant N00014-08-1-0709 and by the California Institute of Technology. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Xiang-Gen Xia.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-08-1-0709
Subject Keywords:Generalized triangular decomposition; geometric mean decomposition (GMD); transceivers; space-time GTD; time-varying channels
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INSPEC Accession Number11704225
Issue or Number:1
Record Number:CaltechAUTHORS:20110201-101300886
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Official Citation:Chih-Hao Liu; Vaidyanathan, P.P.; , "MMSE DFE Transceiver Design Over Slowly Time-Varying MIMO Channels Using ST-GTD," Signal Processing, IEEE Transactions on , vol.59, no.1, pp.277-289, Jan. 2011 doi: 10.1109/TSP.2010.2087329 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21948
Deposited By: Tony Diaz
Deposited On:14 Feb 2011 17:47
Last Modified:03 Oct 2019 02:32

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