Energy Efficiency Maximization of Full-Duplex NOMA Systems With Improper Gaussian Signaling Under Imperfect Self-Interference Cancellation

This work addresses the energy efficiency maximization for a downlink cooperative full-duplex non-orthogonal multiple access (FD-NOMA) system in the presence of imperfect self-interference cancellation. We consider the case where users adopt improper Gaussian signaling (IGS) for their transmission a...

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Published inIEEE communications letters Vol. 26; no. 7; pp. 1613 - 1617
Main Authors Abu Mahady, Islam, Bedeer, Ebrahim, Ikki, Salama, Yanikomeroglu, Halim
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Bit error rate
Cancellation
Energy efficiency
full-duplex NOMA
Full-duplex system
Improper Gaussian signaling
Interference
Interference cancellation
Maximization
NOMA
Nonorthogonal multiple access
Optimization
Quality of service
Relays
Signaling
Online AccessGet full text
ISSN1089-7798
1558-2558
DOI10.1109/LCOMM.2022.3168233

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Abstract This work addresses the energy efficiency maximization for a downlink cooperative full-duplex non-orthogonal multiple access (FD-NOMA) system in the presence of imperfect self-interference cancellation. We consider the case where users adopt improper Gaussian signaling (IGS) for their transmission and consequently derive the achievable rate of each link in the cooperative system. We jointly optimize the power allocation at the base-station and the IGS circularity coefficients of the cooperative IGS-based FD-NOMA system to maximize its energy efficiency subject to quality-of-service (QoS) requirements. Furthermore, improper constellation diagrams are designed using the predefined optimized IGS coefficients to study the impact of IGS on bit error rate performance. Simulation results demonstrate considerable energy efficiency performance gain of IGS-based FD-NOMA system over its proper Gaussian signaling (PGS)-based FD-NOMA counterpart under residual interference from imperfect self interference cancellation.
AbstractList This work addresses the energy efficiency maximization for a downlink cooperative full-duplex non-orthogonal multiple access (FD-NOMA) system in the presence of imperfect self-interference cancellation. We consider the case where users adopt improper Gaussian signaling (IGS) for their transmission and consequently derive the achievable rate of each link in the cooperative system. We jointly optimize the power allocation at the base-station and the IGS circularity coefficients of the cooperative IGS-based FD-NOMA system to maximize its energy efficiency subject to quality-of-service (QoS) requirements. Furthermore, improper constellation diagrams are designed using the predefined optimized IGS coefficients to study the impact of IGS on bit error rate performance. Simulation results demonstrate considerable energy efficiency performance gain of IGS-based FD-NOMA system over its proper Gaussian signaling (PGS)-based FD-NOMA counterpart under residual interference from imperfect self interference cancellation.
Author Bedeer, Ebrahim
Ikki, Salama
Abu Mahady, Islam
Yanikomeroglu, Halim
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  organization: Department of Systems and Computer Engineering, Carleton University, Ottawa, ON, Canada
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SubjectTerms Bit error rate
Cancellation
Energy efficiency
full-duplex NOMA
Full-duplex system
Improper Gaussian signaling
Interference
Interference cancellation
Maximization
NOMA
Nonorthogonal multiple access
Optimization
Quality of service
Relays
Signaling
Title Energy Efficiency Maximization of Full-Duplex NOMA Systems With Improper Gaussian Signaling Under Imperfect Self-Interference Cancellation
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