A MIMO system with backward compatibility for OFDM-based WLANs
EURASIP Journal on Applied Signal Processing
Joint transceiver design for MIMO communications using geometric mean decomposition
IEEE Transactions on Signal Processing - Part I
Uniform channel decomposition for MIMO communications
IEEE Transactions on Signal Processing
Performance analysis and design optimization of LDPC-coded MIMO OFDM systems
IEEE Transactions on Signal Processing
Adaptive MIMO-OFDM based on partial channel state information
IEEE Transactions on Signal Processing
MIMO transmission over a time-varying channel using SVD
IEEE Transactions on Wireless Communications
Capacity scaling in MIMO wireless systems under correlated fading
IEEE Transactions on Information Theory
Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
A high-performance MIMO OFDM wireless LAN
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
Transceiver design based on blockwise uniform channel decomposition for coded MIMO systems
IEEE Transactions on Wireless Communications
A new beamforming for 60GHz wireless system with reduced feedback overhead
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
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The single-input single-output (SISO) orthogonal frequency-division multiplexing (OFDM) systems for wireless local area networks (WLAN) defined by the IEEE 802.11a standard can support data rates up to 54 Mbps. In this paper, we consider deploying two transmit and two receive antennas to increase the data rate up to 108 Mbps. Applying our recent multiple-input multiple-output (MIMO) transceiver designs, that is, the geometric mean decomposition (GMD) and the uniform channel decomposition (UCD) schemes, we propose simple and efficient closed-loop MIMO-OFDM designs for much improved performance, compared to the standard singular value decomposition (SVD) based schemes as well as the open-loop V-BLAST (vertical Bell Labs layered space-time) based counterparts. In the explicit feedback mode, precoder feedback is needed for the proposed schemes. We show that the overhead of feedback can be made very moderate by using a vector quantization method. In the time-division duplex (TDD) mode where the channel reciprocity is exploited, our schemes turn out to be robust against the mismatch between the uplink and downlink channels. The advantages of our schemes are demonstrated via extensive numerical examples.