Sciweavers

Share
CORR
2008
Springer

Cross-Layer Link Adaptation Design for Relay Channels with Cooperative ARQ Protocol

8 years 2 months ago
Cross-Layer Link Adaptation Design for Relay Channels with Cooperative ARQ Protocol
The cooperative automatic repeat request (C-ARQ) is a link layer relaying protocol which exploits the spatial diversity and allows the relay node to retransmit the source data packet to the destination, when the latter is unable to decode the source data correctly. This paper presents a cross-layer link adaptation design for C-ARQ based relay channels in which both source and relay nodes employ adaptive modulation coding and power adaptation at the physical layer. For this scenario, we first derive closed-form expressions for the system spectral efficiency and average power consumption. We then present a low complexity iterative algorithm to find the optimized adaptation solution by maximizing the spectral efficiency subject to a packet loss rate (PLR) and an average power consumption constraint. The results indicate that the proposed adaptation scheme enhances the spectral efficiency noticeably when compared to other adaptive schemes, while guaranteeing the required PLR performance.
Morteza Mardani, Jalil S. Harsini, Farshad Lahouti
Added 10 Dec 2010
Updated 10 Dec 2010
Type Journal
Year 2008
Where CORR
Authors Morteza Mardani, Jalil S. Harsini, Farshad Lahouti
Comments (0)
books