Outage analysis of NOMA-based cooperative relay systems with imperfect SIC

Singh, Shailendra; Bansal, Matadeen

doi:10.1016/j.phycom.2020.101219

Cited by 25 publications

(15 citation statements)

References 19 publications

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“…The overall OP with respect to SNR is plotted in Figure 2A by setting the threshold rates R1,R2 ð Þ¼ 1:0, 1:0 ð Þbits=s=Hz and I-SIC value being β ¼ 0:1, considering perfect CSI for the NFR-C-NOMA and technique adopted in previous works. [13][14][15][16] It is evident from the plot that analytical are closely match with simulation results. At low SNR regime of 5-10 dB, outage is higher because of fading and when SNR gets higher than 15 dB, the OP starts decreasing.…”

Section: Resultssupporting

confidence: 66%

“…The NFR-C-NOMA system attains an OP of 10 À3 at 20.5 dB, which is much lower than conventional scheme. 16 Hence, for an outage of 10 À3 the performance of NFR-C-NOMA scheme enhanced by 3.5 dB. Power allocation plays a crucial role in deciding the outage of the system and should be wisely decided.…”

Section: Resultsmentioning

confidence: 99%

“…Simulation results are compared with existing system in previous works. [13][14][15][16] 2. The performance examination is done by changing the target rate of users with respect to signal-to-noise ratio (SNR).…”

mentioning

confidence: 99%

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Outage analysis of cooperative NOMA system with imperfect successive interference cancellation and channel state information over Rayleigh fading channel

Srinivasarao¹,

Maruthu²

2022

Int J Communication

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Summary Cooperative communication is a significant technology for fifth generation (5G) and beyond wireless communication to improve the quality of service (QoS) in massive networks. In addition, it serves as a promising candidate along with non‐orthogonal multiple access (NOMA) scheme to increase the spectral efficiency. Conventionally, cooperative‐NOMA (C‐NOMA) systems are analysed by assuming perfect successive interference cancellation (SIC) and imperfect SIC (I‐SIC) over Rayleigh, Rican, α−μ, Hoyt fading channels, and so on. In this paper, near–far relay (NFR) C‐NOMA system is analysed aiding perfect SIC, perfect channel state information (CSI), imperfect (I‐CSI) and (I‐SIC) over Rayleigh fading channel. Initially, we derive analytical expressions of outage probability (OP) by considering I‐SIC and I‐CSI for NFR‐C‐NOMA system. The accuracy of analytical results is verified through Monte Carlo (MC) simulations. Interpretation of the results conveys that I‐CSI and I‐SIC have a substantial impact on OP in NFR‐C‐NOMA scheme and existing schemes. Later, we examined impact on OP in NFR‐C‐NOMA by varying relay position, target rate of users and jointly considering the I‐SIC, I‐CSI. Further, it is also observed that the NFR‐C‐NOMA scheme shows better outage performance than state‐of‐the‐art schemes.

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Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

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Outage analysis of cooperative NOMA system with imperfect successive interference cancellation and channel state information over Rayleigh fading channel

Srinivasarao¹,

Maruthu²

2022

Int J Communication

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“…But if the SIC is not perfectly designed, then it will allow some interferences in the desired signal at the receiver. Many things affect the performance of SIC eg, imperfect CSI, imperfect design, imperfect power allocation concerning phase and amplitude [20,23]. Due to imperfect SIC, the SINR at k -th and k -th+1 user will be…”

Section: The Impairments In Communicationmentioning

confidence: 99%

Differential STBC NOMA: A new approach to downlink cooperative NOMA

Jaffri

Khan

Ahmad

et al. 2022

Journal of Electrical Engineering

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Due to the ability of massive connectivity, large bandwidth, and low latency, the non-orthogonal multiple access (NOMA) is considered the best approach for the 5th generation and beyond. However, the system performance is declined when the number of users is increased as each user will experience a great number of successive interface cancelations (SIC) in the downlink. To improve system performance, the NOMA is combined with cooperative communication which gives more spectral efficiency and fairness as compared to non-cooperative NOMA. Furthermore, space-time block code (STBC)- cooperative NOMA-based users experienced less SIC as compared to conventional CNOMA. This paper evaluates the performance of differential STBC-CNOMA with keeping in mind the imperfect SIC, channel state information (CSI), and timing synchronization between distributed cooperating users. The simulations results show that differential STBC-CNOMA gives high performance in terms of outage probability and sum rate analysis as compared to simple STBC-NOMA and conventional CNOMA. Hence, the differential STBC-CNOMA seems to be a better and more effective solution to enhance system performance.

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“…In [22], outage probability analytical expressions are derived for C-NOMA RS scheme over Rayleigh fading channel assuming an imperfect successive interference cancellation (SIC). The above-discussed techniques of C-NOMA are single RS schemes.…”

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confidence: 99%

Minimum Variance Maximum Mean Relay Selection Scheme for Cooperative NOMA Networks

Srinivasarao¹,

Surendar²

2021

Arab J Sci Eng

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Cooperative communication is a key factor in 5G and beyond standards for increasing the quality of service and aids for dense networks. It works in conjugate with non-orthogonal multiple access (NOMA) to increase the connectivity and spectral efficiency. In this paper, a novel minimum variance maximum mean relay selection scheme with fixed power allocation (MVMM-FPA) is proposed for two-stage cooperative NOMA (C-NOMA) networks using decode-and-forward protocol. The outage probability analytical expressions are derived for the MVMM-FPA over Rayleigh fading channel and its performance is observed with the conventional relay selection (RS) schemes. The impact of outage performance on target rate for users and number of relays have been analyzed for the proposed scheme. Monte Carlo simulations are used to corroborate the analytical expressions of outage probability. Simulation results reveal that the MVMM-FPA RS scheme for C-NOMA offers a minimal outage probability than existing max-min RS and orthogonal multiple access schemes without sacrificing the spectral efficiency. IntroductionThe goals of 5G and beyond wireless communications are high spectral efficacy, high data rates, low latency and seamless connectivity. One of the trustworthy entrant for 5G is non-orthogonal multiple access (NOMA), when compared to alternative technologies like time division multiple access (TDMA), frequency division multiple access (FDMA) and orthogonal frequency division multiple (OFDM) access schemes [1][2][3][4][5][6][7]. NOMA permits multiple users to transmit data simultaneously at same frequency band using power domain, [8][9][10]. NOMA with cooperative communication will further improve the quality of the service (QoS). The state of art cooperative NOMA (C-NOMA) techniques are discussed below.

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Outage analysis of NOMA-based cooperative relay systems with imperfect SIC

Cited by 25 publications

References 19 publications

Outage analysis of cooperative NOMA system with imperfect successive interference cancellation and channel state information over Rayleigh fading channel

Outage analysis of cooperative NOMA system with imperfect successive interference cancellation and channel state information over Rayleigh fading channel

Differential STBC NOMA: A new approach to downlink cooperative NOMA

Minimum Variance Maximum Mean Relay Selection Scheme for Cooperative NOMA Networks

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