Hybrid Block Diagonalization for Massive MIMO Two-Way Half-Duplex AF Hybrid Relay
Information Theory
2018-09-18 v1 math.IT
Abstract
We consider a multi-pair two-way amplify-and-forward massive multi-input multi-output (MIMO) hybrid relay with MIMO user-pairs. A hybrid relay has lesser number of radio frequency (RF) chains than the antennas, which significantly reduces the implementation cost. We employ block-diagonalization-based baseband processing at the hybrid relay to cancel the inter user-pair interference and equal-gain-combining-based RF processing to maximize the beamforming gain. We also use an algebraic norm maximizing relay transmit strategy to maximize the spectral efficiency (SE) of each user-pair. We numerically show that the proposed hybrid relay has only marginally inferior SE than a full RF-chain relay.
Cite
@article{arxiv.1809.06032,
title = {Hybrid Block Diagonalization for Massive MIMO Two-Way Half-Duplex AF Hybrid Relay},
author = {Arpita Singh Chauhan and Ekant Sharma and Rohit Budhiraja},
journal= {arXiv preprint arXiv:1809.06032},
year = {2018}
}
Comments
Accepted for publication in IEEE SPCOM'18