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An Efficient Detector for STBC-VBLAST Space-Time Code for MIMO Wireless Communications

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5 Author(s)
Cortez, J. ; Electr. Eng. Dept., ITSON Univ., Ciudad Obregon, Mexico ; Bazdresch, M. ; Garcia, A. ; Campoy, J.M.
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Hybrid MIMO communication systems are defined as a combination of architectures designed to achieve both multiplexing gain (such as VBLAST), and diversity gain, (such as STBC) such that transmission schemes that have both high spectral efficiency and link reliability can be developed.In this paper we introduce a new way to represent hybrid systems, in which the detection process is carried out in a unified manner for both spatial and diversity transmitted symbols, using an OSIC algorithm, but symbol by symbol,just as single VBLAST systems performs. In this paper we present an efficient and low-complexity, ordered, successive interference cancellation receiver based on sorted QR decomposition for the hybrid STBC-VBLAST transmission scheme. We show how the use of our detection scheme proposal outperforms other recent hybrid detection schemes in terms of bit error rate, even when there is precoding at the transmitter. We also show our proposal has lower complexity,achieved by exploiting the structure of the linear dispersion matrices.

Published in:

Electronics, Robotics and Automotive Mechanics Conference, 2009. CERMA '09.

Date of Conference:

22-25 Sept. 2009

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