NOMA-based Integrated Satellite-Terrestrial Multi-relay Networks with Hardware Impairments and Partial Relay Selection Scheme

Zhou

Wireless Communications and Mobile Computing

et al. 2022

Self Cite

This paper studies the secrecy outage probability (SOP) of nonorthogonal multiple access (NOMA)-based integrated satellite-multiple unmanned aerial vehicle networks (ISMUAVNs) under nonideal hardware and colluding scheme. Colluding scheme is defined as that the eavesdroppers cooperate with each other to overhear the legitimate users’ signals. On this foundation, we obtain the closed-form expression for the SOP for the considered NOMA-based ISMUAVNs along with the partial unmanned aerial vehicle (UAV) selection scheme. To gain more things in the high signal-to-noise ratio (SNR) regime, we derive the asymptotic expression for the SOP, which gives fast ways to evaluate the benefit of the NOMA scheme and the impact of nonideal hardware impairments on the SOP. Finally, Monte Carlo simulation results are provided to show the correctness of the analytical results. In addition, with the help of representative results, some important and interesting findings are obtained.

Section: Introductionmentioning

confidence: 99%

“…In [32], the impact of nonideal hardware was investigated for the ISTRNs. In [33], Guo analyzed the effect of nonideal hardware on the ISTRNs with multiple terrestrial relays under the partial wireless node selection scheme.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Analysis of NOMA-Based Integrated Satellite-Multiple UAV Networks under Nonideal Hardware and Colluding Scheme

Zhou

Wireless Communications and Mobile Computing

et al. 2022

Self Cite

“…In [22], the authors considered NOMA-based integrated terrestrial satellite networks (ISTN) to study the effect of relaying configurations such as Amplify and Forward (AF) and Decode and Forward (DF). The authors in [28] investigated a system similar to the study in [22] and explored the effect of CI under a DF relay configuration.…”

Section: Introductionmentioning

confidence: 99%

Impact of CCI on Performance Analysis of Downlink Satellite-Terrestrial Systems: Outage Probability and Ergodic Capacity Perspective

Nguyen

et al. 2021

Preprint

The evolution of non-orthogonal multiple access (NOMA) has raised many opportunities for massive connectivity with less latency in signal transmissions at great distances. Power-Domain NOMA transmits user signals superimposed in the same resource block by varying the power coefficient of each user according to their channel state information (CSI). At the receiver’s end, successive interference cancellation (SIC) is performed to extract the desired signal from the superimposed signal. Imperfect CSI should therefore be studied in this context. Satellite-terrestrial networks and relay networks have already gained significance in the field of communications through their efficient data transmission techniques. We aimed to integrate NOMA with a satellite communications network under both imperfect CSI and co-channel interference (CCI) from nearby systems with respect to analysis of ground user performance. In our considered system, two users perform downlink communications under Power-Domain NOMA. We analyzed the performance of this system with two modes of shadowing effect: Heavy Shadowing (HS) and Average Shadowing (AS). Performance was analyzed in terms of the outage probability and ergodic capacity of the system. We derived closed-form expressions and performed a numerical analysis. We discovered that the performance of two destinations depends on the strength of the transmit power at the satellite. However, floor outage occurs because the system depends on other parameters, such as satellite link modes, noise levels, and the number of interference sources. More specifically, if, for example, the number of interference sources is 5, the outage performance of the system experiences a decrease of approximately 40% at a signal to noise ratio (SNR) of 30 dB at the satellite. Outage probability and ergodic capacity became saturated at SNRs of 50 dB and 45 dB, respectively. To verify the authenticity of the derived closed-form expressions, we also performed Monte-Carlo simulations.

“…The work in [ 23 ] introduced NOMA into HSTRN and analyzed the system outage performance when the near users of the NOMA group were relayed as far users. The authors in [ 24 , 25 ], respectively studied the outage performance of the HSTRN system based on NOMA under the condition of hardware damage, partial relay selection scheme and imperfect CSI.…”

Section: Introductionmentioning

confidence: 99%

Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA

Zhao

Liang

2020

Sensors

The non-orthogonal multiple access (NOMA) scheme realizes the transmission of multiple user signals at the same time and frequency resource block through power domain multiplexing, which improves the system transmission rate and user fairness. In this paper, we propose a joint relay-and-antenna selection scheme based on the cognitive radio scenario. This scheme can achieve the maximum communication rate of the secondary user when the primary user maintains the optimal outage performance. In the considered system both terrestrial relays and users are deployed with multi-antenna configurations and the terrestrial relays adopt the decode-and-forward (DF) strategy to achieve communication between satellites and users. Then, we derive the exact outage probability expression of each user in the system and the asymptotic probability expression under high signal-to-noise ratio (SNR). Numeric results demonstrate that increasing the number of relays and antennas on the terrestrial nodes can both improve system outage performance. Moreover, the number of relays imposes a more obvious effect on the achievable system performance.