Optimal Unitary Linear Processing for Amplify-and-Forward Cooperative OFDM systems
Information Theory
2012-04-27 v3 math.IT
Optimization and Control
Abstract
In this paper, we consider the amplified-and-forward relaying in an OFDM system with unitary linear processing at the relay. We proposed a general analytical framework to find the unitary linear processing matrix that maximizes the system achievable rate. We show that the optimal processing matrix is a permutation matrix, which implies that a subcarrier pairing strategy is optimal. We further derived the optimal subcarrier pairing schemes for scenarios with and without the direct source-destination path for diversity. Simulation results are presented to demonstrate the achievable gain of optimal subcarrier pairing compared with non-optimal linear processing and non-pairing.
Cite
@article{arxiv.1003.4302,
title = {Optimal Unitary Linear Processing for Amplify-and-Forward Cooperative OFDM systems},
author = {Min Dong and Mahdi Hajiaghayi and Ben Liang},
journal= {arXiv preprint arXiv:1003.4302},
year = {2012}
}
Comments
This paper has been withdrawn by the authors