Journal article
Optimal precoder for amplify-and-forward half-duplex relay system
Abstract
In this paper, an optimal unitary precoder is designed for an amplify-and-forward (AF) half-duplex relay system to obtain the maximum coding gain while the original ergodic channel capacity for the relay system is kept unchanged. A closed-form design is derived for quadrature amplitude modulation (QAM) signals by employing the properties of Farey sequence in number theory. Simulation results indicate that the proposed design greatly improves …
Authors
Ding Y; Zhang J-K; Wong K
Journal
IEEE Transactions on Wireless Communications, Vol. 7, No. 8, pp. 2890–2895
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Publication Date
August 1, 2008
DOI
10.1109/twc.2008.070226
ISSN
1536-1276