Article (Scientific journals)
Constructive Interference for Generic Constellations
Haqiqatnejad, Alireza; Kayhan, Farbod; Ottersten, Björn
2018In IEEE Signal Processing Letters, 25 (4), p. 586-590
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Keywords :
Constructive interference (CI); Multiuser multiple-input single-output (MISO); Symbol-level precoding (SLP)
Abstract :
[en] In this letter, we investigate optimal and relaxed constructive interference regions (CIR) for the symbol-level precoding (SLP) problem in the downlink of a multiuser multiple-input single-output (MISO) channel.We define two types of CIRs, namely, distance preserving CIR (DPCIR) and union bound CIR (UBCIR) for any given constellation shape and size. We then provide a systematic way to describe these regions as convex sets. Using the definitions of DPCIR and UBCIR, we show that the SLP power minimization problem, minimizing either sum or peak (per-antenna) transmit power, can always be formulated as a convex optimization problem. Our results indicate that these regions allow further reduction of the transmit power compared to the current state of the art without increasing the computational complexity at the transmitter or receiver.
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 :
Constructive Interference for Generic Constellations
Publication date :
April 2018
Journal title :
IEEE Signal Processing Letters
ISSN :
1070-9908
Publisher :
IEEE
Volume :
25
Issue :
4
Pages :
586-590
Peer reviewed :
Peer Reviewed verified by ORBi
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
Available on ORBilu :
since 11 April 2018

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