Performance Analysis of Amplify and Forward Cooperative Networks over Rayleigh and Nakagami-m Channels based Relaying Selection

Ali Abdulwahhab Mohammed,Li Yu,Manar Al-Kali,Desheng Wang

doi:10.24297/ijct.v15i5.1638

Abstract

In this paper investigates the performance, analysis of amplify and forward (AF) cooperative networks with the relay selection over Â Nakagami-m and Rayleigh fading channels and Â M-ary phase shift keying (MPSK) modulations. New closed form expressions are derived for the general cases of Rayleigh and Nakagami-m fading channels. cumulative density function (CDF), probability density function (PDF) of the end â€“to - end signal â€“to â€“ nois ratio (SNR) of a dual-hop opportunistic AF relaying system, moment generating function (MGF), symbol error rate (SER) and outage probability (Pout). and the firstÂ closed-form study for opportunistic AF relaying system where the best node is selected from a number of candidate intermediate nodes to relay the data signal between the source and the destination. Simulation results reveal that the PDF , CDF, Pout and SER performance downgrades either the m parameter or the number of relays increases. Our simulations compared between Rayleigh and Nakagami-m links for a different number of relays. In addition, different modulation techniques are examined to show the effect of the modulation scheme which was used over Rayleigh and Nakagami-m fading channels on the cooperative networks. The obtained results proved the impact of m parameters, relay selection and modulation index on the pout and SER performance.

Highlights

Cooperative Networks schemes have been recently proposed as a promising technique for high quality wireless communication services
Analytical expressions for the probability density function (PDF), cumulative density function (CDF) and moment generating function (MGF) of the signal –to – nois ratio (SNR) are used to derive the expressions for outage probability over Rayleigh Fading channels
We present a performance analysis of all relays for the AF cooperative networks of the half-hop and we derive new closed-form expressions for the cumulative density function (CDF), probability density function (PDF) of the end –to - end signal –to – nois ratio (SNR) of a dual-hop opportunistic AF relaying system, moment generating function (MGF), symbol error rate (SER) and outage probability (Pout) .we compared performance study the effect of increasing the number of relays over Nakagami-m and Rayleigh fading channels we analytical investigation of the 6749 | P a g e March 2016

Summary

Introduction

Cooperative Networks schemes have been recently proposed as a promising technique for high quality wireless communication services. [4] The authors used amplify and forward (AF) relaying over Nakagami-m fading channels to derive a new lower bound and asymptotic expression for the outage probability of cooperative diversity in direct sequence code-division multiple access (DS-CDMA).

Results

Conclusion