Antenna-Permutation Channel-Vector Quantization for Finite Rate Feedback in Zero-Forcing Beamforming Multiuser MIMO-OFDM Systems

Masaaki FUJII  

IEICE TRANSACTIONS on Communications   Vol.E92-B    No.7    pp.2442-2451
Publication Date: 2009/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2442
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
finite rate feedback,  multiuser multiple-input and multiple-output,  zero-forcing beamforming,  pre-whitening maximum likelihood detection,  

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An antenna-permutation (AP) scheme is described for channel-vector quantization (CVQ) in zero-forcing beamforming (ZFBF) multiuser multiple-input and multiple-output orthogonal frequency-division multiplexing systems with multiple receive antennas. Different sets of multiple channel sub-matrices are selected for different subcarriers and then quantized to multiple quantization vectors for finite rate feedback. Based on the quantization vectors, ZFBF provides a single stream or multiple streams to users while increasing frequency selectivity. Simulation results demonstrate that AP-CVQ with four-bit quantization that incorporates with pre-whitening maximum likelihood detection for two stream reception achieved better average packet error rates than minimum mean square error receive beamforming for single stream reception when the frequency selectivity was not severe.