joint subchannel allocation; hybrid precoding design; mmWave multiuser OFDMA systems
Abstract :
[en] This paper studies hybrid precoding (HP) for mmWave multi-user OFDMA systems with sub-carrier allocation (SA) consideration. Constrained by a computation limit on the total number of data streams that can be processed, we aim to jointly optimize the SA and HP design to maximize the system sum-rate. This optimization is first formulated as a computation sparsity-constrained HP design problem, which is non-convex and challenging to solve. We then propose two-stage solution approach to tackle the problem. In stage one, we optimize the fully digital precoding (FDP) considering the computation sparsity constraint. In the second stage, we exploit an alternating MMSE minimization algorithm to reconstruct the HP's based on the achieved FDP. A novel analog precoding design, namely “Projected-Gradient-Descent based”, is then proposed to optimize the analog part of the HP's.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Ha, Vu Nguyen ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Nguyen, Duy H. N.
Frigon, Jean-Francois
External co-authors :
yes
Language :
English
Title :
Joint subchannel allocation and hybrid precoding design for mmWave multi-user OFDMA systems
Publication date :
08 October 2017
Event name :
2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
Event date :
from 08-10-2017 to 13-10-2017
Main work title :
2017 IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) proceedings