An optimal self-interference cancellation for full-duplex amplify-and-forward relay

In this paper, a joint analog and digital domain self-interference cancellation is considered for the full-duplex (FD) amplify-and-forward (AF) relay with a single receive antenna but multiple transmit antennas. Under the assumption that there is no direct link between a source and a destination, th...

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Bibliographic Details
Published in:2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) pp. 13217 - 1221
Main Authors: Young Yun Kang, Byung-Jae Kwak, Joon Ho Cho
Format: Conference Proceeding
Language:English
Published: IEEE 01.09.2013
Subjects:
Array signal processing
Mobile communication
Optimization
Receiving antennas
Relays
Transmitting antennas
Vectors
ISSN:2166-9570
Online Access:Get full text
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Summary:In this paper, a joint analog and digital domain self-interference cancellation is considered for the full-duplex (FD) amplify-and-forward (AF) relay with a single receive antenna but multiple transmit antennas. Under the assumption that there is no direct link between a source and a destination, the end-to-end spectral efficiency is maximized subject to the average transmit power constraint at the relay. Unlike previous approaches, an average power constraint is imposed also on the output of the relay's receive antenna to take into account the hardware limitations in the RF chain of the relay's receiver. A nonconvex quadratically constrained quadratic programming problem is formulated and the optimal beamforming vector is derived in a closed algorithmic expression through the systematic reduction and the partitioning of the constraint set. It is shown that the FD-AF relay significantly outperforms the half-duplex (HD) AF relay by properly compensating for the duplexing loss of the HD-AF relay.
ISSN:2166-9570
DOI:10.1109/PIMRC.2013.6666324