A performance analysis about impact of I/Q imbalance in AF two-hop relay system

Huynh, Tan-Phuoc; Kieu, Tam Nguyen; Do, Dinh‐Thuan; Vozňák, Miroslav; Uhrin, Dominik

doi:10.1109/bihtel.2016.7775720

Cited by 1 publication

(3 citation statements)

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“…As explained above, (21) gives the BER for a P2P NOMA scheme. Thus, it refers to BER of m 1 symbols in downlink NOMA (i.e., P m1,s1 ≜ P…”

Section: ) Ber Of Noma For Point-to-point (P2p) Communicationmentioning

confidence: 99%

“…. Finally, to find the e2e BER in CNOMA, we obtain P m1,sr , P m1,r1 by using (21) and P m2,sr , P m1,r2 by using (23) and then substituting them into (18) for u1 and u2, respectively.…”

Section: ) Ber Of Noma For Point-to-point (P2p) Communicationmentioning

confidence: 99%

“…However, in a realistic communication scenario, the RF component suffers from various types of hardware impairment (HWI) that limit the performance of the overall system, such as oscillator phase noise (PN), high power amplifier (HPA) and in-phase and quadrature-phase imbalance (IQI) [19], [20]. The effect of individual HWI on the system's performance has been examined in [21]- [23], where the authors in [21], [23] analyzed throughput and OP performance with the impacts of IQI on the transceiver frontend of the AF two-hop relay node with different IQI levels. The impact of non-linear HPA has been studied in [22], where the OP, ergodic capacity and BER performance deteriorated compared to linear HPA.…”

Section: Introductionmentioning

confidence: 99%

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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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“…As explained above, (21) gives the BER for a P2P NOMA scheme. Thus, it refers to BER of m 1 symbols in downlink NOMA (i.e., P m1,s1 ≜ P…”

Section: ) Ber Of Noma For Point-to-point (P2p) Communicationmentioning

confidence: 99%

“…. Finally, to find the e2e BER in CNOMA, we obtain P m1,sr , P m1,r1 by using (21) and P m2,sr , P m1,r2 by using (23) and then substituting them into (18) for u1 and u2, respectively.…”

Section: ) Ber Of Noma For Point-to-point (P2p) Communicationmentioning

confidence: 99%