Outage performance of NOMA‐based integrated satellite‐terrestrial networks with imperfect CSI

Xie, Silin; Zhang, Bangning; Guo, Daoxing; Ma, Wei

doi:10.1049/el.2018.7839

Cited by 16 publications

(8 citation statements)

References 9 publications

(13 reference statements)

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“…In this section, we investigate the outage performance and ergodic sum capacity of the coordinated NOMA strategy for ITSN. According to [ 8 , 9 ], the authors believe that it is important to study the outage probability when data rates of each stream are adjusted according to the quality of service (QoS) requirements of each user. But unlike the outage probability, the ergodic sum capacity is important when the transmission rates are predetermined in accordance with users’ channel conditions.…”

Section: Performance Analysismentioning

confidence: 99%

A coordinated non-orthogonal multiple access strategy for integrated terrestrial-satellite networks

Xiang

Ren

2021

PLoS ONE

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In this paper, we investigate the outage probability and ergodic sum capacity of the downlink of the integrated satellite-terrestrial networks (ISTN) with a cooperative non-orthogonal multiple access (CNOMA) scheme, in which a user with better channel condition acts as a relay node and forwards information to the other users. In this paper, a pilot-based channel estimation method is considered which can verify the performance of this scheme with the imperfect channel state information. In this model, all these users are equipped with multi-antennas, and all of them are both in the coverage of a same beam of the satellite. Specifically, the exact analytical expression for the outage probability and ergodic sum capacity of the system is derived. The result shows that this coordinated non-orthogonal multiple access (CNOMA) scheme performs better than that of OMA (TDMA) in this model. Finally, the future research directions are given to further enhance the system capacity.

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Section: Performance Analysismentioning

confidence: 99%

A coordinated non-orthogonal multiple access strategy for integrated terrestrial-satellite networks

Xiang

Ren

2021

PLoS ONE

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“…The main demodulation error of user 2 is that the constellation points near the I axis at the transmitter move to the other side of the coordinate axis when the points are demodulated. For example, the red point (01,1) moves to the area of the black point (11,0). This will cause demodulation error of user 1, i.e., the first bit 0 is demodulated as 1.…”

Section: The Proposed Sc Schemementioning

confidence: 99%

The Performance Analysis of Downlink NOMA in LEO Satellite Communication System

2020

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Non-orthogonal multiple access (NOMA) has the potential to provide higher throughput than conventional orthogonal multiple access (OMA), which has been considered as a key technology for 5G. NOMA in satellite communication system can provide anytime, anywhere access with improved spectral efficiency and system capacity because of its ubiquitous coverage. However, the characteristics of the satellite channels are different from that of the terrestrial network, i.e., huge time delay and Doppler shift. In this paper, different from the existing works, which mainly focus on the performance of NOMA in static terrestrial base stations and Geostationary orbit (GEO) scenarios, we investigate the performance analysis of downlink NOMA in dynamic low earth orbit (LEO) satellite communication system with Doppler shift considered. We combine NOMA and orthogonal frequency division multiplexing (OFDM) for better spectral efficiency. Our channel model includes both small scale model and large scale model. For simplify, we only consider two users in one spot beam. Besides, we express the performance analysis of downlink NOMA in LEO satellite communication system, like ergodic capacity, outage probability (OP) and mutual information. However, in traditional NOMA scheme, the proceeding error decision of the high power user will cause the deterioration of the subsequent detection performance. Therefore, a symmetrical coding (SC) scheme for different modulation mode is proposed for low power users to get better performance. Finally, simulation results validate the performance of the NOMA scheme is better than that of the OMA scheme. The proposed SC scheme can achieve a prominent increase performance contrasted to the traditional NOMA scheme. INDEX TERMS LEO satellite communication system, NOMA, ergodic capacity, outage probability, mutual information, symmetrical coding scheme. AIJUN LIU (Member, IEEE) received the B.S. degree in microwave communications and the M.S. and Ph.D. degrees in communications engineering and information systems from the College of Communications Engineering, Army Engineer

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“…Li et al in [18] analyzed the performance of NOMA simultaneous wireless information and power transfer relaying networks over Weibull fading channels, where the imperfect CSI and residual hardware impairments were taken into account. The authors in [19] proposed the NOMA based integrated satellite-terrestrial networks, and studied the effect of impefect CSI on channel estimation by using pilot based channel estimation method. Finally, the validity of the theoretical results were verified by Monte-Carlo simulation.…”

Section: Introductionmentioning

confidence: 99%

“…Although the aforementioned works such as [19], [20] have greatly improved our understanding on the NOMA based terrestrial-satellite networks under imperfect CSI condition, it should be noted that they did not take into account the effect of non-ideal SIC on system performance, and the channels considered were unordered. Additionally, unlike in [24], where the authors assumed perfect channel estimation, we consider the practical scenario where channel estimation is imperfect.…”

Section: Introductionmentioning

confidence: 99%

Joint Effects of Imperfect CSI and SIC on NOMA Based Satellite-Terrestrial Systems

et al. 2021

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This paper investigates a satellite-terrestrial system employing the non-orthogonal multiple access (NOMA) scheme over Shadowed-Rician fading channels. The effects of both imperfect channel state information (CSI) and imperfect successive interference cancellation (SIC) on the NOMA based satellite-terrestrial system are taken into account. First, the outage performance of the proposed system is evaluated, and the closed-form expressions for the exact and asymptotic outage probabilities are obtained. Next, the expressions of the ergodic sum rate and system throughput are derived in the presence of channel estimation errors and residual interference. Moreover, we analyze the impacts of different residual interference levels on the energy efficiency. Finally, the numerical simulation results are conducted to verify the correctness of theoretical analysis and the advantages of the proposed NOMA scheme. At medium-high SNR region, the NOMA users are capable of outperforming orthogonal multiple access (OMA) users in terms of outage behaviors and system throughput with imperfect CSI and imperfect SIC. The ergodic sum rate decreases as the level of residual interference increases, and is even lower than that of OMA once goes beyond a certain value. Additionally, the energy efficiency of NOMA scheme is sensitive to the imperfect SIC.INDEX TERMS Satellite-terrestrial system, non-orthogonal multiple access (NOMA), imperfect CSI, imperfect SIC.

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Outage performance of NOMA‐based integrated satellite‐terrestrial networks with imperfect CSI

Cited by 16 publications

References 9 publications

A coordinated non-orthogonal multiple access strategy for integrated terrestrial-satellite networks

A coordinated non-orthogonal multiple access strategy for integrated terrestrial-satellite networks

The Performance Analysis of Downlink NOMA in LEO Satellite Communication System

Joint Effects of Imperfect CSI and SIC on NOMA Based Satellite-Terrestrial Systems

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