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Robust Design of Power Minimizing Symbol-Level Precoder under Channel Uncertainty
Haqiqatnejad, Alireza; Kayhan, Farbod; Ottersten, Björn
2019In IEEE Global Communications Conference (GLOBECOM), Abu Dhabi 9-13 December 2018
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Keywords :
Channel uncertainty; distance preserving constructive interference region; downlink multiuser MISO channel; robust precoding design; symbol-level precoding
Abstract :
[en] In this paper, we investigate the downlink transmission of a multiuser multiple-input single-output (MISO) channel under a symbol-level precoding (SLP) scheme, having imperfect channel knowledge at the transmitter. In defining the SLP design problem, a general category of constructive interference regions (CIR) called distance preserving CIR (DPCIR) is adopted. In particular, we are interested in a robust SLP design minimizing the total transmit power subject to individual quality-of-service (QoS) requirements. We consider two common models for the channel uncertainty region, namely, spherical (norm-bounded) and stochastic. For the spherical uncertainty model, a worst-case robust precoder is proposed, while for the stochastically known uncertainties, we derive a convex optimization problem with probabilistic constraints. We simulate the performance of the proposed robust approaches, and compare them with the existing methods. Through the simulation results, we also show that there is an essential trade-off between the two robust approaches.
Research center :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Disciplines :
Electrical & electronics engineering
Author, co-author :
Haqiqatnejad, Alireza ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Kayhan, Farbod ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
no
Language :
English
Title :
Robust Design of Power Minimizing Symbol-Level Precoder under Channel Uncertainty
Publication date :
21 February 2019
Event name :
2018 IEEE Global Communications Conference (GLOBECOM)
Event organizer :
IEEE
Event place :
Abu Dhabi, United Arab Emirates
Event date :
from 9-12-2018 to 13-12-2018
Audience :
International
Main work title :
IEEE Global Communications Conference (GLOBECOM), Abu Dhabi 9-13 December 2018
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust
FnR Project :
FNR11332341 - Enhanced Signal Space Optimization For Satellite Communication Systems, 2016 (01/02/2017-31/01/2020) - Farbod Kayhan
Funders :
FNR - Fonds National de la Recherche [LU]
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since 26 February 2019

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