Review of Capacity Enhancement of 5G Wireless System Using MIMO OFDM Technique in MATLAB

The combination of Multiple Input Multiple Output MIMO and Orthogonal Frequency Division Multiplexing OFDM has become a key technology in modern wireless communication systems due to its ability to improve data rate, coverage, and energy efficiency. Conventional modulation schemes such as QPSK, 16 QAM, and 64 QAM are widely used however, they offer limited spectral efficiency, especially under the high Signal to Noise Ratio SNR conditions commonly found in 5G networks. To overcome these limitations, this study investigates higher order modulation schemes, including 256 QAM, 1024 QAM, and 4096 QAM. The performance of these schemes is evaluated using metrics such as Bit Error Rate BER , throughput, and spectral efficiency through MATLAB based simulations. The results show that higher order modulation techniques significantly improve throughput and spectral efficiency at high SNR levels, making them suitable for high data rate 5G MIMO OFDM systems. In contrast, lower order modulation schemes like QPSK demonstrate better robustness in noisy environments, where reliability is more important than data rate. These findings indicate that different modulation schemes are suitable for different network conditions. Future work should focus on hybrid modulation strategies that adaptively combine low and high order schemes to achieve optimal performance across diverse 5G scenarios. Bugade Prajakta S. | Nighojkar Pooja K. "Review of Capacity Enhancement of 5G Wireless System Using MIMO-OFDM Technique in MATLAB" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-9 | Issue-6 , December 2025, URL: https://www.ijtsrd.com/papers/ijtsrd99974.pdf Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/99974/review-of-capacity-enhancement-of-5g-wireless-system-using-mimoofdm-technique-in-matlab/bugade-prajakta-s