Title :
Asymptotic Outage Probability for Amplify-and-Forward CDMA Systems over Nakagami-m Fading Channels
Author :
Mehemed, Ali ; Hamouda, Walaa
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
Abstract :
In this paper, we address the performance of cooperative code-division multiple-access (CDMA) systems using amplify-and-forward (AF) relaying over independent nonidentical (i.ni.d) Nakagami-m fading channels. The outage probability of the system is investigated using the moment generating function (MGF) of the total signal-to-noise ratio (SNR) at the base station. Since it is complicated to derive a closed form expression of the outage probability, we derive an approximation for the probability density function (PDF) of the total SNR which in turn enables us to derive the asymptomatic outage probability for any value of the fading parameter m. Simulation results are presented to assess the accuracy of our analytical results. Furthermore, using the derived outage probability, we investigate the diversity advantage of the cooperative system under different system settings.
Keywords :
Nakagami channels; amplify and forward communication; code division multiple access; cooperative communication; probability; Nakagami-m fading channels; amplify-and-forward CDMA systems; amplify-and-forward relaying; asymptotic outage probability; base station; closed form expression; cooperative code-division multiple-access systems; cooperative system; moment generating function; probability density function; signal-to-noise ratio; Approximation methods; Base stations; Diversity reception; Fading; Multiaccess communication; Relays; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6399064
