Effect of Feedback Delay on the Performance of Cooperative Networks with Relay Selection
- 24 October 2011
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications
- Vol. 10 (12), 4161-4171
- https://doi.org/10.1109/TWC.2011.101711.100901
Abstract
In this paper, we analyze the effect of feedback delay and channel estimation errors on the performance of a decode-and-forward (DF) cooperative transmission scenario with relay selection. In our relay selection scheme, only one relay with the best relay-to-destination (R → D) channel quality is selected among the set of relays that decode the source information correctly. Specifically, the destination terminal first estimates the channel state information (CSI) of all active R → D links and then sends the index of the best relay to the relay terminals via a delayed feedback link. Due to the time varying nature of the fading channels, selection is performed based on the old version of the channel estimate. Closed-form expressions for the outage probability, average capacity and average symbol error rate (ASER) are derived. Through asymptotic diversity order analysis, we show that the presence of feedback delay reduces the asymptotic diversity order to one, while the effect of channel estimation errors reduces it to zero. Finally, simulation results are presented to corroborate the analytical results.Keywords
This publication has 24 references indexed in Scilit:
- Amplify-and-Forward Selection Cooperation over Rayleigh Fading Channels with Imperfect CSIIEEE Transactions on Wireless Communications, 2011
- Performance of selection relaying and cooperative diversityIEEE Transactions on Wireless Communications, 2009
- On the Performance of Amplify-and-Forward Cooperative Diversity with the Nth Best-Relay Selection SchemePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2009
- Impact of imperfect channel estimation on the performance of amplify-and-forward relayingIEEE Transactions on Wireless Communications, 2009
- Selection cooperation in multi-source cooperative networksIEEE Transactions on Wireless Communications, 2008
- On Channel Estimation and Capacity for Amplify and Forward Relay NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- A closed-form expression for the outage probability of decode-and-forward relaying in dissimilar Rayleigh fading channelsIEEE Communications Letters, 2006
- A Distributed Relay-Assignment Algorithm for Cooperative Communications in Wireless NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- Symbol error probabilities for general Cooperative linksIEEE Transactions on Wireless Communications, 2005
- Exact Symbol Error Probability of a Cooperative Network in a Rayleigh-Fading EnvironmentIEEE Transactions on Wireless Communications, 2004