JoWUA

Abstract

The evolution of Multiple Input Multiple Output (MIMO) technology has significantly strengthened wireless communication performance; however, persistent challenges remain in interference mitigation, computational complexity, and spectrum efficiency. Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC-OQAM) has emerged as a viable alternative to Orthogonal Frequency Division Multiplexing (OFDM). This non-orthogonal waveform is attractive because of its low out-of-band radiation and high spectral efficiency. Nevertheless, inter-symbol and inter-carrier interference arising from the non-orthogonal nature of FBMC-OQAM signals and computational complexity degrade system performance. To address these challenges, this paper will present a new framework which is a synergistic integration of Code Division Multiple Access (CDMA), FBMC-OQAM, and space-time coding in MIMO. There are three major goals of the suggested strategy. To reduce mitigation of interference, the incorporation of CDMA spreading sequences is done to reduce inter-symbol and inter-carrier interference. Second, the space-time coding is designed with the aim of minimizing the number of computations made without affecting the performance. Third, the framework's objective is to improve bit error rate and other performance indicators, spectral efficiency, and robustness against multipath fading, ensuring reliable communication in MIMO environments. Performance of the proposed method is assessed and contrasted with additional benchmark models. Experimental results show that integrating CDMA with FBMA-OQAM and space-time coding significantly reduces interference, minimizes complexity, and enhances spectral utilization. The developments will ensure that future wireless networks can enjoy quality and dependable communication procedures. The proposed work establishes a solid foundation for the practical implementation of FBMC-OQAM in MIMO systems.