Performance Analysis of Opportunistic AF Relaying using Antenna Selection under Adaptive Transmission

Abstract

During the last few decades, the cooperative relaying communication has emerged as a prominent technology for the current and future wireless communication systems. This technology has the capability to provide the substantial performance improvements in terms of spectral efficiency, data rates, channel capacity, radio coverage, and link reliability to the wireless networks. Hence, the researchers from academia as well as industry have been attracted to explore this topic in more detail. Cooperative relaying techniques are classified into two main methods for the successful transmission of data signals from a source to a destination: amplify-and-forward (AF) and decode-and-forward (DF). Recently, numerous research studies have focused on the adaptive transmission techniques which exploit the time-varying nature of wireless link to further enhance the performance of cooperative relaying networks. In this thesis, we investigate the opportunistic AF relaying scheme using antenna selection in conjunction with the adaptive transmission techniques over independent and identically distributed (i.i.d.) Rayleigh fading channels. In this research work, we derive the new closed-form analytical expressions for the outage probability, average symbol error rate (SER), and average channel capacity of an opportunistic AF relaying using antenna selection under four different adaptive transmission techniques: optimal power and rate adaptation (opra), optimal rate adaptation with constant transmit power (ora), channel inversion with fixed rate (cifr ), and truncated channel inversion with fixed rate (tifr ). The performances of the proposed system are evaluated and compared with a different number of relays and various antennas configurations. We also investigate and analyze DF relaying network with beamforming over κ − µ fading channels. We derive the new exact analytical expressions for the outage probability, average bit error rate (BER), and average capacity. The performances of proposed system for the derived expressions are evaluated for the different values of fading parameters κ, µ, and a different number of antennas at source N1 and destination N2 of the DF relaying network.