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<p>TeraHertz (THz) band is the key potential candidate for 6G communication to provide large bandwidth and high data rate. Smaller wavelength in this high frequency band can reduce antenna size. However, large propagation loss in the THz frequency limits the communication distance. Multiple Input Multiple Output (MIMO) design has been introduced to compensate the attenuation of high frequency transmission. Modulation technique and antenna design needs to be addressed to explore TeraHertz communication. In this study 8 × 8 MIMO have been collaborated with power domain Non-Orthogonal Multiple Access (NOMA) and Orthogonal Frequency Division Multiplexing (OFDM). The system has been evaluated for two users using OFDM of 64 sub carriers and 1000 samples. System performance has been analyzed at 0.1THz frequency. Prior to transmission MIMO-OFDM precoding and spatial multiplexing have been implemented to improve the throughput, spectral efficiency and capacity. Simultaneous data transmission from multiple users at particular frequency has been enabled allocating different power ratio in NOMA. Besides, inter symbol interference can be mitigated using OFDM. Successive Interference Cancellation (SIC) technique has been applied to retrieve each user signal. Precoding, Beam steering, channel estimation and Maximum Ratio Combining techniques have been collaborated in this integrated system for the betterment of system performance. Bit Error Rate (BER) and channel capacity have been compared applying Binary Phase Shift Keying (BPSK), 8-Quadrature Phase Shift Keying (8-QPSK) and 8-Quadrature Amplitude Modulation (8-QAM) techniques. The obtained results prove the reliability of this new proposed system. Capacity can be enhanced in the range of hundreds of Gigabits per second (Gbps) applying this novel technique. This integrated system has the potential to meet the requirement of acceptable signal quality, throughput and the channel capacity for 5G and beyond communication system.</p>

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Novel method of capacity enhancement: integrating MIMO with beam steering, OFDM and NOMA with different modulation

  • 期刊论文

  • 发表日期：

    2025年3月28日

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  • Pia Sarkar,
  • Arijit Saha,
  • Amit Banerjee,
  • Vedatrayee Chakraborty

摘要

TeraHertz (THz) band is the key potential candidate for 6G communication to provide large bandwidth and high data rate. Smaller wavelength in this high frequency band can reduce antenna size. However, large propagation loss in the THz frequency limits the communication distance. Multiple Input Multiple Output (MIMO) design has been introduced to compensate the attenuation of high frequency transmission. Modulation technique and antenna design needs to be addressed to explore TeraHertz communication. In this study 8 × 8 MIMO have been collaborated with power domain Non-Orthogonal Multiple Access (NOMA) and Orthogonal Frequency Division Multiplexing (OFDM). The system has been evaluated for two users using OFDM of 64 sub carriers and 1000 samples. System performance has been analyzed at 0.1THz frequency. Prior to transmission MIMO-OFDM precoding and spatial multiplexing have been implemented to improve the throughput, spectral efficiency and capacity. Simultaneous data transmission from multiple users at particular frequency has been enabled allocating different power ratio in NOMA. Besides, inter symbol interference can be mitigated using OFDM. Successive Interference Cancellation (SIC) technique has been applied to retrieve each user signal. Precoding, Beam steering, channel estimation and Maximum Ratio Combining techniques have been collaborated in this integrated system for the betterment of system performance. Bit Error Rate (BER) and channel capacity have been compared applying Binary Phase Shift Keying (BPSK), 8-Quadrature Phase Shift Keying (8-QPSK) and 8-Quadrature Amplitude Modulation (8-QAM) techniques. The obtained results prove the reliability of this new proposed system. Capacity can be enhanced in the range of hundreds of Gigabits per second (Gbps) applying this novel technique. This integrated system has the potential to meet the requirement of acceptable signal quality, throughput and the channel capacity for 5G and beyond communication system.