A Comparison of OFDM Techniques in Massive MIMO on Data Throughput and Spectral Efficiency in Digital Wireless Communication Systems

Abstract

The exponential increase in wireless services necessitate development of advance technologies for wireless communication to enable massive machine-type communications (mMTC), enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and optimized resource management to achieve a seamless 5G and 6G goals. Therefore, high spectral efficiency and data throughput becomes the major focus in designing a robust wireless communication systems. This study examine the performance of massive multiple input multiple output (mMIMO) communication systems using wavelet-order orthogonal frequency division multiplexing (W-OFDM) and Fast Fourier Transform orthogonal frequency division multiplexing (FFT-OFDM). A communication system based on W-OFDM Massive MIMO was modelled in a MATLAB software and its performance was compared with FFT- OFDM. Key performance metrics, specifically the data throughput and spectral efficiency were evaluated to assess the effectiveness and capabilities of the two systems. The simulation results indicates that at a bandwidth of 20 MHz, W-OFDM achieved up to 35% reduction in peak-to-average-power-ratio (PAPR) compared to the FFT-OFDM. Also, at a Beat Error Rate of 0.0001 ms, the Signal-Noise-Ratio (SNR) for FFT-OFDM is 9.00 dB while W-OFDM achieved SNR of 12.00dB at BER of 0.01ms. This translates to a 20% improvement in beat error rate (BER) performance under Rayleigh fading conditions. Also, the data throughput of W-OFDM mMIMO outperforms FFT-OFDM by 15%, making it a viable technology to realise high data rates and reliability. Conclusively, the analytical evaluation confirmed that W-OFDM mMIMO provides substantial benefits for improving spectral efficiency and high data rate in wireless communication systems, addressing the challenges of increased user demands for high throughput. This research suggests that this technology can play a critical role in the improvement in spectral efficiency and high data rate for future generation network.