Performance analysis of cooperative small cell systems under correlated Rician/Gamma fading channels

Li, Xingwang; Li, Jingjing; Li, Lihua; Du, Liutong; Jin, Jin; Zhang, Di

doi:10.1049/iet-spr.2017.0078

Cited by 14 publications

(7 citation statements)

References 34 publications

(87 reference statements)

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“…limited spectrum. To solve the above problems, a myriad of physical layer technologies have been proposed, such as massive multiple-input multiple-output (MIMO) [1], [2], non-orthogonal multiple access (NOMA) [3], [4], millimeter wave (mmWave) [5], [6], small cell networks (SCNs) [7], [8], satellite communication [9], [10] and unmanned aerial vehicles (UAVs) [11], [12]. Among the above technologies, satellite communication and UAV communication are critical segments to support some applications of the upcoming 5G and beyond networks.…”

Section: Introduction a Backgroundmentioning

confidence: 99%

A Unified Framework for HS-UAV NOMA Networks: Performance Analysis and Location Optimization

Wang

Peng

et al. 2020

IEEE Access

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In this paper, we propose a unified framework for hybrid satellite/unmanned aerial vehicle (HS-UAV) terrestrial non-orthogonal multiple access (NOMA) networks, where satellite aims to communicate with ground users with the aid of a decode-forward (DF) UAV relay by using NOMA protocol. All users are randomly deployed to follow a homogeneous Poisson point process (PPP), which is modeled by the stochastic geometry approach. To reap the benefits of satellite and UAV, the links of both satellite-to-UAV and UAV-to-ground user are assumed to experience Rician fading. More practically, we assume that perfect channel state information (CSI) is infeasible at the receiver, as well as the distance-determined path-loss. To characterize the performance of the proposed framework, we derive analytical approximate closed-form expressions of the outage probability (OP) for the far user and the near user under the condition of imperfect CSI. Also, the system throughput under delay-limited transmission mode is evaluated and discussed. In order to obtain more insights, the asymptotic behavior is explored in the high signal-to-noise ratio (SNR) region and the diversity orders are obtained and discussed. To further improve the system performance, based on the derived approximations, we optimize the location of the UAV to maximize the sum rate by minimizing the average distance between the UAV and users. The simulated numerical results show that: i) there are error floors for the far and the near users due to the channel estimation error; ii) the outage probability decreases as the Rician factor K increasing, and iii) the outage performance and system throughput performance can be further improved considerably by carefully selecting the location of the UAV. INDEX TERMS Non-orthogonal multiple access (NOMA), unmanned aerial vehicle (UAV), satellite communication, location optimization, Rician fading channels.

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Section: Introduction a Backgroundmentioning

confidence: 99%

A Unified Framework for HS-UAV NOMA Networks: Performance Analysis and Location Optimization

Wang

Peng

et al. 2020

IEEE Access

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“…Proof: A. Non-ideal condition 1) When σ 2 e XY = Ω XY 1+δρ XY Ω XY In a similar methodology to [4], (13) can be extended to Taylor's form. When ρ XY → ∞, Only the first summation of an infinite series is the dominant term.…”

Section: Appendix Cmentioning

confidence: 99%

“…With the development of wireless communication networks (WCNs), the applications of various smart devices have attracted considerable attention, such as internet of things (IoT) [1], deviceto-device (D2D) communications [2], machine-to-machine (M2M) communications [3], small cell networks (SCNs) [4] and wearable devices [5]. Owing to the broadcast nature of wireless electromagnetic waves, WCNs become vulnerable to the attack of eavesdroppers, so it is very important to ensure the security of communication systems.…”

Section: Introductionmentioning

confidence: 99%

Secure analysis of multi‐antenna cooperative networks with residual transceiver HIs and CEEs

Huang

et al. 2019

IET Communications

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In this paper, we investigate the secure performance of multi-antenna decode-and-forward (DF) relaying networks where the Nakagami-m fading channel is taken into account. In practice, the joint impact of residual transceiver hardware impairments (HIs) and channel estimation errors (CEEs) on the outage probability and intercept probability is taken into account. Considering HIs and CEEs, an optimal transmit antenna selection (OTAS) scheme is proposed to enhance the secure performance and then a collaborative eavesdropping scheme is proposed. Additionally, we present main channel capacity and intercept capacity of the multi-antenna DF relaying networks. More specifically, we derive exact closed-form expressions for the outage and intercept probabilities. To obtain useful insights into implications of parameters on the secure performance, the asymptotic behaviors for the outage probability are examined in the high signal-to-noise ratio (SNR) regime and the diversity orders are obtained and discussed. Simulation results confirm the analytical derivations and demonstrate that: 1) As the power distribution coefficient increases, OP decreases, while IP increases; 2) There exist error floors for the outage probability at high SNRs, which is determined by CEEs; 3) The secure performance can be improved by increasing the number of source antennas and artificial noise quantization coefficient, while as the number of eavesdropping increases, the security performance of the system is reduced; 4) There is a trade-off between the outage probability and intercept probability. secrecy outage probability (SOP) and strictly positive secrecy capacity (SPSC). Regarding the non-homogeneous fading environments, the authors in [11] explored the secrecy performance of Wyner's model over α − µ fading channels. With the help of moment matching method, the authors in [12] derived approximate expressions for the SOP and SPSC over κ − µ shadowed fading channels. On a parallel avenue, cooperative relaying is another promising technique to further improve the spectral efficiency and enhance the coverage of wireless networks [13-15], and thus it attracts plenty of researchers to investigate the security issues of cooperative networks [16-23]. In [16], the authors analyzed the secrecy performance of amplify-and-forward (AF) relay systems over generalized-K fading channels, where three metrics for the SOP, average secrecy capacity (ASC) and SPSC were analyzed. To improve the PLS against eavesdropping attacks, the optimal relay selection (ORS) scheme was proposed for AF and decode-and-forward (DF) relay networks and the intercept probability (IP) for the proposed scheme was derived in closed-form [17]. From the perspective of energy harvesting, the authors in [18] proposed a cooperative transmission scheme for the AF and DF relay networks under the condition of an eavesdropper, where the relays can harvest energy from radio-frequency (RF) signals of a source through power-splitting protocol. In the existing research results, the researchers discuss...

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“…With the development of Internet of Things (IoT), traditional orthogonal multiple access (OMA) can no longer afford massive connections due to its low spectrum utilization [1]. The proposals of massive multiple-input multipleoutput (MIMO) [2], small cell networks (SCNs) [3], millimeter wave (mmWave) [4], nonorthogonal multiple access (NOMA) [5], and some other 5G-related technologies have made it possible to implement the IoT [6]. Among these technologies, NOMA has been accepted by the Third Generation Partnership Project (3GPP) due to the fact that it can serve multiple devices simultaneously without neglecting fairness [7].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of IQI Impaired Cooperative NOMA for 5G-Enabled Internet of Things

Guo

Deng

et al. 2020

Wireless Communications and Mobile Computing

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This paper investigates the joint effects of in-phase and quadrature-phase imbalance (IQI) and imperfect successive interference cancellation (ipSIC) on the cooperative Internet of Things (IoT) nonorthogonal multiple access (NOMA) networks where the Nakagami-m fading channel is taken into account. The closed-form expressions of outage probability for the far and near IoT devices are derived to evaluate the outage behaviors. For deeper insights of the performance of the considered system, the approximate outage probability and diversity order in high signal-to-noise ratio (SNR) regime are obtained. In addition, we also analyze the throughput and energy efficiency to characterize the performance of the considered system. The simulation results demonstrate that, compared with IQI, ipSIC has a greater impact on the outage performance for the near-IoT-device of the considered system. Furthermore, we also find that the outage probabilities of IoT devices can be minimized by selecting a specific power allocation scheme.

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Performance analysis of cooperative small cell systems under correlated Rician/Gamma fading channels

Cited by 14 publications

References 34 publications

A Unified Framework for HS-UAV NOMA Networks: Performance Analysis and Location Optimization

A Unified Framework for HS-UAV NOMA Networks: Performance Analysis and Location Optimization

Secure analysis of multi‐antenna cooperative networks with residual transceiver HIs and CEEs

Performance Analysis of IQI Impaired Cooperative NOMA for 5G-Enabled Internet of Things

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