Ultra-Massive MIMO Technologies For 6G Wireless Networks At THz Bands.pdf

This research paper proposes and designs a hybrid beamforming system for 6G wireless networks, focusing on ultra-massive Multiple Input Multiple Output (mMIMO) technology operating in the terahertz (THz) frequency band (0.1 THz – 10 THz). The main objectives are to:

1. Address the growing global demand for ultra-high spectral efficiencies, data rates, speeds, and bandwidths in next-generation wireless networks.
2. Leverage the advantages of THz bands, such as smaller wavelengths enabling compact high-gain antennas and massive spatial multiplexing.
3. Develop a robust system capable of supporting 6G communication needs, including holographic communication, industry 4.0, remote operated driving, and tactile internet.

Key Points:

- mMIMO Antenna Configurations: The study explores antenna arrays ranging from 64 to 256 elements at the base station (BS) and 4 to 16 elements at multiple user stations (MS).
- Frequency Band: The system is designed to operate specifically at 0.14 THz, with performance comparisons made to mmWave hybrid beamforming systems at 28 GHz and 73 GHz bands.
- Higher Order Modulation: Rigorous verification of the proposed system's functionality is conducted using higher order quadrature amplitude modulation (QAM) schemes to achieve higher spectral efficiencies.
- Performance Metrics: Evaluation metrics include error vector magnitude, symbol constellations, and antenna array radiation beams, highlighting the system's performance at various data stream/user configurations.
- Results and Comparison: The study concludes that maximum data streams per user lead to higher throughputs, aligning with 6G requirements. Performance is also compared to existing mmWave systems, demonstrating the potential of THz bands for future wireless communication.