Title :
Opportunistic Multiple Relay Selection with Diverse Mean Channel Gains
Author :
Yu, Chia-Hao ; Tirkkonen, Olav
Author_Institution :
Dept. of Commun. & Networking, Aalto Univ., Aalto, Finland
fDate :
3/1/2012 12:00:00 AM
Abstract :
We consider multiple relay selection for proactive relaying with diverse mean channel gains on different links. We consider a variable rate system where the transmission rate is maximized based on an end-to-end (e2e) channel gain. We consider two relay selection methods and provide an efficient algorithm for selecting an optimal set of active relay nodes, with a cardinality constraint on the set. An approximation to the statistical behavior of the e2e performance for the two relay selection methods is derived. Our results show benefits from using multiple relays when different links exhibit different mean channel gains.
Keywords :
cooperative communication; diversity reception; radio links; wireless channels; active relay nodes; cardinality constraint; cooperative diversity; diverse mean channel gains; end-to-end channel gain; opportunistic multiple relay selection; proactive relaying; transmission rate; variable rate system; Approximation algorithms; Approximation methods; Complexity theory; Fading; Geometry; Relays; Resource management; Cooperative diversity; multiple relay selection; proactive relaying;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2012.011012.110420
