Nonregenerative MIMO Relaying With Optimal Transmit Antenna Selection
Peters, S.
Heath, R.W.
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX;
This paper appears in: Signal Processing Letters, IEEE
Publication Date: 2008
Volume: 15,
On page(s): 421-424
ISSN: 1070-9908
INSPEC Accession Number: 10003215
Digital Object Identifier: 10.1109/LSP.2008.921466
Current Version Published: 2008-04-22
Abstract
We derive optimal SNR-based transmit antenna selection rules at the source and relay for the nonregenerative half-duplex MIMO relay channel. While antenna selection is a suboptimal form of beamforming, it has the advantage that the optimization is tractable and can be implemented with only a few bits of feedback from the destination to the source and relay. We compare the bit error rate of optimal antenna selection at both the source and relay to other proposed beamforming techniques and propose methods for performing the necessary limited feedback.
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