Full-duplex cooperative NOMA system under impacts of residual SI and MAI

Nguyen, Hang-Thi-Thu; Nguyen, Thuy; Tran, Xuan Nam

doi:10.1080/00207217.2020.1818844

Cited by 2 publications

(1 citation statement)

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“…Therefore, to improve the performance of the DF CNOMA system, the hybrid relaying scheme that switches between full and half duplex (FD/HD) has been investigated in [6], [7]. For a more realistic system, the authors in [8] analyzed the residual self-interference and residual multiple access interferences due to imperfect cochannel interference cancellation on the FD-CNOMA over Nakagami-channel in terms of OP and ergodic capacity. The FD/HD coordinated direct and DF relay transmission in the NOMA system is analyzed in terms of OP and ergodic sum rate under imperfect channel state information (ipCSI) and imperfect successive interference cancellation (ipSIC) in [9].…”

Section: Introductionmentioning

confidence: 99%

A Unified Performance Analysis of Cooperative NOMA With Practical Constraints: Hardware Impairment, Imperfect SIC and CSI

et al. 2022

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Non-orthogonal multiple access (NOMA) has been a strong candidate to support massive connectivity in future wireless networks. In this regard, its implementation into cooperative relaying, named cooperative-NOMA (CNOMA), has received tremendous attention from researchers. However, most of the existing CNOMA studies have failed to address practical constraints since they assume ideal conditions. Particularly, the error performance of CNOMA schemes with imperfections has not been investigated yet. In this paper, we provide an analytical framework for error and outage performance of CNOMA schemes under practical assumptions where we take into account imperfect successive interference canceler (ipSIC), imperfect channel state information (ipCSI), and hardware impairments (HWI) at the transceivers. We derive analytical expressions of bit error rate (BER) expressions in CNOMA schemes whether the direct links between source and users exist or not which is, to the best of the authors' knowledge, the first study in the open literature. We also derive the outage probability (OP) expressions for CNOMA schemes with and without direct links under practical assumptions. For comparisons, we provide BER and OP expressions for downlink NOMA with practical constraints which also have not been given in the literature, yet. The theoretical BER and OP expressions are validated with computer simulations where the perfect match is observed. Finally, we discuss the effects of the system parameters (e.g., power allocation, HWI level, ipCSI factor) on the performance of CNOMA schemes to reveal fruitful insights for society. The results demonstrate that the HWI, ipCSI and ipSIC have a significant effect on the performance of the systems.

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