Towards 6G: Next Generation Wireless Systems

Abstract

5G will only be able to meet some of the demands of the coming technological advances in 2030 and beyond. Compared to 5G networks, sixth-generation (6G) networks are expected to introduce novel use cases and performance metrics, such as global coverage, cost efficiency, increased radio spectrum, energy intelligence, and safety. The growing global demand for ultra-high spectral efficiencies, data rates, speeds, and bandwidths in next-generation wireless networks motivates researchers to investigate the peak capabilities of massive MIMO (multiple input multiple outputs) and new technique filter bank multi-carrier (FBMC). Lower out-of-band emissions are observed in the FBMC technique compared to orthogonal frequency division multiplexing (OFDM), an essential requirement of upcoming next-generation wireless systems. This paper compares the spectral efficiency for Massive MIMO uplink in a single-cell scenario using linear detectors at the BS with perfect CSI. Arbitrarily larger SNR values are obtained with a higher number of BS antennas in Massive MIMO, which helps to increase the data rate. This paper also demonstrates how linear detectors can help to reduce the symbol error rate (SER) in a Massive MIMO. This paper demonstrates that with the same number of BS antennas and user combinations ZF detector outperforms the MRC detector.