Hybrid Transform-Based MIMO-OFDM Framework for Audio Signal Transmission over Fading Channels
Keywords:
MIMO-OFDM, Hybrid Transform, Audio Transmission, Styling, Spectral Distortion, BERAbstract
MIMO-OFDM, a combination of Multiple Input Multiple Output and Orthogonal Frequency Division Multiplexing, offers a powerful framework for high-quality audio transmission over wireless fading channels. This study investigates the performance of hybrid transform-based MIMO-OFDM systems using combinations such as FFT+DWT, FFT+DCT, and DCT+DWT, alongside modulation schemes including BPSK, QPSK, 8PSK, 16PSK, 16QAM, 64QAM, and 128QAM, across Rayleigh and Rician fading environments. Evaluation focuses on Bit Error Rate (BER) and Spectral Distortion over varying Signal-to-Noise Ratios (SNR). Results reveal that lower-order modulations (BPSK, QPSK) combined with DWT-based hybrids provide optimal BER and spectral performance, while higher-order QAM schemes suffer in fading conditions. The study highlights the importance of adaptive transform-modulation strategies to enhance audio fidelity and robustness in dynamic wireless scenarios.
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