Title :
Performance analysis of variable-rate adaptive modulation for AF opportunistic relaying under outdated CSI
Author :
Torabi, Mohammad ; Frigon, Jean-François ; Haccoun, David
Author_Institution :
Dept. of Electr. Eng., Ecole Polytech. de Montreal, Montréal, QC, Canada
Abstract :
The impact of outdated channel state information (CSI) on the performance of variable-rate adaptive M-ary quadrature amplitude modulation (M-QAM) in an amplify-and-forward (AF) opportunistic relaying system over Rayleigh fading channels is analyzed. Closed-form expressions are derived for the average spectral efficiency, outage probability and the average bit error rate under outdated CSI. Using numerical evaluations, the performances of different cases are compared showing the impact of outdated CSI on the performance of the considered rate-adaptive modulation scheme in AF opportunistic relaying systems.
Keywords :
Rayleigh channels; adaptive modulation; amplify and forward communication; error statistics; quadrature amplitude modulation; wireless channels; AF opportunistic relaying; M-QAM; Rayleigh fading channel; amplify-and-forward opportunistic relaying system; bit error rate; outdated CSI; outdated channel state information; spectral efficiency; variable-rate adaptive M-ary quadrature amplitude modulation; Bit error rate; Delay; Fading; Modulation; Receivers; Relays; Signal to noise ratio;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
DOI :
10.1109/PIMRC.2011.6139808