ABSTRACT
The wireless communication system, which has a considerable impact on the telecommunications industry, is anticipated to have a substantial impact on the growth of a country. The system’s performance is, however, hampered due to impacts of multipath propagation, which may lead to a receiver’s signal fluctuating. The hardware complexity of the Equal Gain Combiner utilized to tackle this problem increases processing time. As a result, in this study, the Equal Gain Combiner with closed form expression over Rayleigh Fading channel is improved by using the Firefly Algorithm (FA) at the receiver. In response to a signal’s Signal-to-Noise Ratio (SNR), FA produces a flashing light, and it outputs the signal highest SNR. Utilizing M-ary Quadrature Amplitude Modulation (M-QAM), which modulates randomly generated bits used as source data, the resultant signals are broadcast across a Rayleigh fading channel. The Firefly Algorithm optimizes the resultant signals at various pathways ‘L’ (2, 3, and 4). The EGC combines the FA outputs to produce the received signal, which is subsequently demodulated into baseband and modulated. Additionally, by using the Outage Probability (OP) of Rayleigh fading channel for varying paths ‘L’, a mathematical expression for Bit Error Rate (BER) is obtained. MATLAB R2018a is used to model the procedure. Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), and Processing Time (PT) are used for performance evaluation. The outcome demonstrates that, with the reduction in hardware complexity, the enhanced EGC (eEGC) offered lower BER values when compared to conventional EGC. The achievements of the eEGC could be employed to enhance the functionality of wireless communication networks.
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