Hybrid optimisation for priority‐based scheduling in multi‐user STBC‐MIMO‐OFDM

Abstract

Resource allocation in wireless communication systems is of great concern in order to guarantee the efficient utilisation of scary resources. In space–time block codes-based multiple-input multiple-output with orthogonal frequency division multiplexing (STBC-MIMO-OFDM) system, scheduling the appropriate user to the available antenna is the major challenge. To overcome the challenge, this study proposes a priority-based scheduling mechanism using the hybrid optimisation, Dolphin-Rider Optimisation (DRO), which is a combination of Dolphin Echolocation Algorithm and Rider Optimisation Algorithm. The prioritisation follows the power and quality of service constraints of the users in such a way that the energy efficiency is enabled in the system. The performance of the system is analysed using the Rayleigh and Rician channels with the transmission media as, text, audio, and image. Moreover, the comparative analysis of the proposed DRO is enabled using three modulation schemes, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying, and quadrature amplitude modulation. The proposed user scheduling mechanism with the BPSK modulation is found to be effective with a minimal bit error rate and maximal throughput of 3.78×10−7 and 0.875.