Energy-Efficient Backscatter Aided Uplink NOMA Roadside Sensor Communications under Channel Estimation Errors

Ihsan, Asim; Chen, Wen; Khan, Wali Ullah; Wu, Qingqing; Wang, Kunlun

doi:10.1109/TITS.2023.3240159

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Article (Scientific journals)

Energy-Efficient Backscatter Aided Uplink NOMA Roadside Sensor Communications under Channel Estimation Errors

Ihsan, Asim; Chen, Wen; Khan, Wali Ullah et al.

2023 • In IEEE Transactions on Intelligent Transportation Systems

Peer Reviewed verified by ORBi

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https://hdl.handle.net/10993/54154

DOI
10.1109/TITS.2023.3240159

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Keywords :

Backscatter Communications; Non-orthogonal Multiple Access; Vehicular Communications

Abstract :

[en] This work presents non-orthogonal multiple access (NOMA) enabled energy-efficient alternating optimization framework for backscatter aided wireless powered uplink sensors communications for beyond 5G intelligent transportation system (ITS). Specifically, the transmit power of carrier emitter (CE) and reflection coefficients of backscatter aided roadside sensors are optimized with channel uncertainties for the maximization of the energy efficiency (EE) of the network. The formulated problem is tackled by the proposed two-stage alternating optimization algorithm named AOBWS (alternating optimization for backscatter aided wireless powered sensors). In the first stage, AOBWS employs an iterative algorithm to obtain optimal CE transmit power through simplified closed-form computed through Cardano’s formulae. In the second stage, AOBWS uses a noniterative algorithm that provides a closed-form expression for the computation of optimal reflection coefficient for roadside sensors under their quality of service (QoS) and a circuit power constraint. The global optimal exhaustive search (ES) algorithm is used as a benchmark. Simulation results demonstrate that the AOBWS algorithm can achieve near-optimal performance with very low complexity, which makes it suitable for practical implementations.

Disciplines :

Electrical & electronics engineering

Author, co-author :

Ihsan, Asim

Chen, Wen

Khan, Wali Ullah ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom

Wu, Qingqing

Wang, Kunlun

External co-authors :

yes

Language :

English

Title :

Energy-Efficient Backscatter Aided Uplink NOMA Roadside Sensor Communications under Channel Estimation Errors

Alternative titles :

[en] Energy-Efficient Backscatter Aided Uplink NOMA Roadside Sensor Communications under Channel Estimation Errors

Publication date :

February 2023

Journal title :

IEEE Transactions on Intelligent Transportation Systems

ISSN :

1558-0016

Publisher :

Institute of Electrical and Electronics Engineers, New-York, United States - New York

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBilu :

since 25 January 2023

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