In this work, we propose a new single-RF MIMO architecture which enjoys high scalability and energy-efficiency. The transmitter in this proposal consists of a single RF illuminator radiating towards a reflecting surface. Each element on the reflecting surface re-transmits its received signal after applying a phase-shift, such that a desired beamforming pattern is obtained. For this architecture, the problem of beamforming is interpreted as linear regression and a solution is derived via the method of least-squares. Using this formulation, a fast iterative algorithm for tuning of the reflecting surface is developed. Numerical results demonstrate that the proposed architecture is fully compatible with current designs of reflecting surfaces.
@article{arxiv.2003.07885,
title = {A Single-RF Architecture for Multiuser Massive MIMO via Reflecting Surfaces},
author = {Ali Bereyhi and Vahid Jamali and Ralf R. Müller and Antonia M. Tulino and Georg Fischer and Robert Schober},
journal= {arXiv preprint arXiv:2003.07885},
year = {2020}
}
Comments
To be presented in the 45th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2020, 5 pages, 4 figures