Title :
When Do Cooperative Networks Profit from CSI Feedback? - An Outage Capacity Perspective
Author :
Valentin, Stefan
Author_Institution :
Bell Labs., Alcatel-Lucent, Stuttgart, Germany
Abstract :
Letting nodes cooperate improves the performance of wireless networks. To organize this cooperation, many cooperative transmitters employ channel knowledge that they obtain from the destination. Such Channel State Information (CSI) feedback introduces errors and overhead whose degrading effect on the overall performance has not been consistently studied so far. Capturing this degradation, we provide a new framework to analyze cooperation´s outage capacity with limited feedback. Our framework holds for selection relaying and can be easily applied to arbitrary network graphs. Applying it to a simple example shows that selection relaying profits from CSI feedback when the acceptable error rate is high. Surprisingly, no effort for feedback needs to be spend at a strict target error rate.
Keywords :
error statistics; protocols; radio networks; state feedback; CSI feedback; arbitrary network graphs; channel knowledge; channel state information feedback; cooperation outage capacity; cooperative networks; cooperative transmitters; error rate; selection relaying; wireless networks; AWGN; Error analysis; Fading; Protocols; Relays; Signal to noise ratio; Transmitters;
Conference_Titel :
Computer Communications and Networks (ICCCN), 2010 Proceedings of 19th International Conference on
Conference_Location :
Zurich
Print_ISBN :
978-1-4244-7114-0
DOI :
10.1109/ICCCN.2010.5560135