Performance Analysis for Near-Field MIMO: Discrete and Continuous Aperture Antennas

Autor:	Xie, Ziyi, Liu, Yuanwei, Xu, Jiaqi, Wu, Xuanli, Nallanathan, Arumugam
Rok vydání:	2023
Předmět:	Computer Science - Information Theory Electrical Engineering and Systems Science - Signal Processing
Druh dokumentu:	Working Paper
Popis:	Performance analysis is carried out in a near-field multiple-input multiple-output (MIMO) system for both discrete and continuous aperture antennas. The effective degrees of freedom (EDoF) is first derived. It is shown that near-field MIMO systems have a higher EDoF than free-space far-field ones. Additionally, the near-field EDoF further depends on the communication distance. Based on the derived EDoF, closed-form expressions of channel capacity with a fixed distance are obtained. As a further advance, with randomly deployed receivers, ergodic capacity is derived. Simulation results reveal that near-field MIMO has an enhanced multiplexing gain even under line-of-sight transmissions. In addition, the performance of discrete MIMO converges to that of continuous aperture MIMO. Comment: 6 pages, 4 figures. This is the long version of the paper which published in IEEE Wireless Communications Letters with the same title
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2304.06141 Zobrazit plný text záznamu View this record from Arxiv