Abstract
The millimeter wave (mmWave) based full-dimensional (FD) MIMO communication is one of the promising technology to fulfill the demand of high data rate for the sixth generation (6G) services including 6D hologram, haptic and multi-sensory communications. In order to satisfy the requirements of 6G applications, we investigate a non-uniform rectangular array (NURA) structure with FD-MIMO antenna systems for the multiuser mmWave communications. For the dense scenarios where the number of users to be served is high, we propose user selection algorithms for both digital and hybrid transceiver designs in FD-MIMO with NURA for the multiuser mmWave communications. For the digital transceivers, the users are selected based on their channel correlation considering FD-MIMO with NURA structures. For the hybrid transceivers, sequential user and beam selection is performed using the correlation between the beamspace channels in FD-MIMO with NURA case. The superiority of the NURA compared to uniform antenna structure is shown through the performance evaluations in the multiuser mmWave communications. Besides, the sum data rate results and complexity analysis denote the feasibility of the proposed algorithms compared to the joint user and beam selection schemes.
Highlights
For the generation of wireless networks, millimeter wave communication has drawn great interest to respond to the need for ever-increasing data traffic
The performance of the full dimensional MIMO (FD-MIMO) with non-uniform rectangular array (NURA) in the digital transceivers is evaluated for the sparse scenarios where the number of users is less than or equal to the number of radio frequency (RF) chains to provide the optimal NURA designs
The performance of the user selection algorithm in the FD-MIMO with NURA using the digital transceivers is provided for the dense scenarios where the number of users is much higher than the number of RF chains
Summary
For the generation of wireless networks, millimeter wave (mmWave) communication has drawn great interest to respond to the need for ever-increasing data traffic. The IA method classifies the users by considering the multiuser interferences and selects the beams based on the maximization of the sum data rate. There is no need to use phase shifters to concentrate the beams on the desired directions Since this is advantageous in terms of the hardware cost, in this work, we utilize beam-based or beamspace massive MIMO architecture for the hybrid transceiver. In this article, we investigate the NURA technology by considering user selection algorithms for mmWave communication with both digital and hybrid transceivers. We demonstrate that the proposed algorithm improves the sum data rate performance by eliminating highly correlated users in the FD-MIMO with NURA design. Apart from the existing studies in the literature, we propose a sequential user and beam selection algorithm based on the channel norm and the correlation. O(.) is the big-O notation for the complexity analysis
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