Title :
Performance analysis of AF cooperative systems with HPA nonlinearity in semi-blind relays
Author :
Jian Qi ; Aissa, Sonia ; Alouini, Mohamed-Slim
Author_Institution :
King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
Abstract :
In this paper, dual-hop amplify-and-forward (AF) cooperative systems in the presence of high-power amplifier (HPA) nonlinearity at semi-blind relays, are investigated. Based on the modified AF cooperative system model taking into account the HPA nonlinearity, the expression for the output signal-to-noise ratio (SNR) at the destination node is derived, where the interference due to both the AF relaying mechanism and the HPA nonlinearity is characterized. The performance of the AF cooperative system under study is evaluated in terms of average symbol error probability (SEP), which is derived using the moment-generating function (MGF) approach, considering transmissions over Nakagami-m fading channels. Numerical results are provided and show the effects of some system parameters, such as the HPA parameters, numbers of relays, quadrature amplitude modulation (QAM) order, Nakagami parameters, on performance.
Keywords :
Nakagami channels; amplify and forward communication; cooperative communication; error statistics; interference suppression; power amplifiers; quadrature amplitude modulation; relay networks (telecommunication); AF cooperative system; HPA nonlinearity; MGF; Nakagami parameter; Nakagami-m fading channel; SEP; amplify and forward communication; destination node; high power amplifier; interference suppression; moment generating function; performance analysis; quadrature amplitude modulation; semiblind relay; signal to noise ratio; symbol error probability;
Conference_Titel :
Global Communications Conference (GLOBECOM), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-0920-2
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2012.6503773
