scholarly journals Outage Analysis of Parasitic Ambient Backscatter Communication in Decode-and-Forward Relay Networks with SWIPT

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1273
Author(s):  
Yanhong Tuo ◽  
Chao Zhang
Keyword(s):  
Interference Cancellation ◽  
Primary Source ◽  
Relay Networks ◽  
Power Splitting ◽  
Decode And Forward ◽  
Backscatter Communication ◽  
Rf Signals ◽  
Outage Probabilities ◽  
The One ◽  
The Cost

In this paper, we investigate the outage performance of simultaneous wireless information and power transfer (SWIPT) based Decode-and-Forward (DF) relay networks, where the relay needs to simultaneously forward information for two relaying links, primary relaying link and parasitic relaying link. The primary relaying link is the traditional source-relay-destination relay system. While in the parasitic relaying link, the parasitic source, i.e., Internet-of-Things (IoT) tag, is not connected to the stable power source and thus has to backscatter the signals from the primary source to convey its information. The relay not only harvests energy from Radio Frequency (RF) signals from both sources but also forwards messages to their corresponding destinations. The primary source and destination are unaware of the parasitic backscatter transmission, but the relay and parasitic destination can employ successive interference cancellation (SIC) detector to eliminate the interference from the primary link and detect the message from the parasitic source. In order to investigate the interplay between the primary and parasitic relaying links, the outage probabilities of both relaying links are derived. Besides, the effects of system parameters, i.e., power splitting coefficient, forwarding power allocation coefficient and backscatter reflection coefficient, on the system performance are discussed. Simulation results verify our theoretical analysis. In the meanwhile, it is revealed that the advised relaying system has far larger sum throughput than the one with only primary relaying link and the parasitic relaying link can gain considerable throughput at the cost of negligible degradation of primary throughput.

scholarly journals Outage Analysis in SWIPT-Based Decode-and-Forward Relay Networks with Partial Relay Selection

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Phu Tran Tin ◽  
Van-Duc Phan ◽  
Phu X. Nguyen ◽  
Thanh-Long Nguyen ◽  
Dong-Si Thien Chau ◽  
...  
Keyword(s):  
Relay Network ◽  
Power Splitting ◽  
Decode And Forward ◽  
Half Duplex ◽  
Partial Relay Selection ◽  
Rf Signals ◽  
Static Power ◽  
Optimal Dynamic ◽  
Analytical Expressions ◽  
Outage Analysis

This work studies the SWIPT-based half-duplex (HD) decode-and-forward (DF) relay network, wherein the relay user can scavenge power from the source’s radio-frequency (RF) signals and then utilize it to convey the information to the destination. Specifically, two SWIPT-based relaying schemes, termed static power splitting- (SPS-) based relaying (SPSR) and optimal dynamic power splitting- (DPS-) based relaying (ODPSR), are proposed to investigate the benefits of each one fully. Based on the above discussions, the relaying system’s performance for outage probability (OP) is studied. Concretely, we derive the analytical expressions for both SPSR and DPSR methods. Finally, the numerical simulations are executed to corroborate the analysis and simulation results.

scholarly journals System Performance Analysis for an Energy Harvesting IoT System Using a DF/AF UAV-Enabled Relay with Downlink NOMA under Nakagami-m Fading

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 285
Author(s):  
Anh-Nhat Nguyen ◽  
Van Nhan Vo ◽  
Chakchai So-In ◽  
Dac-Binh Ha
Keyword(s):  
Energy Harvesting ◽  
System Performance ◽  
Base Station ◽  
Second Phase ◽  
Power Splitting ◽  
Amplify And Forward ◽  
Decode And Forward ◽  
Adaptive Power ◽  
Outage Probabilities ◽  
Two Phases

This paper investigates system performance in the Internet of Things (IoT) with an energy harvesting (EH) unmanned aerial vehicle (UAV)-enabled relay under Nakagami-m fading, where the time switching (TS) and adaptive power splitting (APS) protocols are applied for the UAV. Our proposed system model consists of a base station (BS), two IoT device (ID) clusters (i.e., a far cluster and a near cluster), and a multiantenna UAV-enabled relay (UR). We adopt a UR-aided TS and APS (U-TSAPS) protocol, in which the UR can dynamically optimize the respective power splitting ratio (PSR) according to the channel conditions. To improve the throughput, the nonorthogonal multiple access (NOMA) technique is applied in the transmission of both hops (i.e., from the BS to the UR and from the UR to the ID clusters). The U-TSAPS protocol is divided into two phases. In the first phase, the BS transmits a signal to the UR. The UR then splits the received signal into two streams for information processing and EH using the APS scheme. In the second phase, the selected antenna of the UR forwards the received signal to the best far ID (BFID) in the far cluster and the best near ID (BNID) in the near cluster using the decode-and-forward (DF) or amplify-and-forward (AF) NOMA scheme. We derive closed-form expressions for the outage probabilities (OPs) at the BFID and BNID with the APS ratio under imperfect channel state information (ICSI) to evaluate the system performance. Based on these derivations, the throughputs of the considered system are also evaluated. Moreover, we propose an algorithm for determining the nearly optimal EH time for the system to minimize the OP. In addition, Monte Carlo simulation results are presented to confirm the accuracy of our analysis based on simulations of the system performance under various system parameters, such as the EH time, the height and position of the UR, the number of UR antennas, and the number of IDs in each cluster.

scholarly journals UAV-Enabled Cooperative NOMA with Indoor- Outdoor User-Paring and SWIPT in kappa-mu Channels

2021 ◽  
Author(s):  
Arafat Al-Dweik ◽  
Adel S. A. Alqahtani ◽  
Emad Alsusa
Keyword(s):  
Interference Cancellation ◽  
Performance Metrics ◽  
Ergodic Capacity ◽  
Power Splitting ◽  
Decode And Forward ◽  
Splitting Factor ◽  
Aerial Vehicle ◽  
The Individual ◽  
Generalized Fading Model

<div>This work presents a performance analysis on cooperative non-orthogonal multiple accesses (C-NOMA) when assisted with energy harvesting enabled unmanned aerial vehicle (UAV) decode-and-forward (DF) relaying. In particular, two scenarios are considered, an outdoor-indoor one, where the NOMA signal propagates through outdoor-to-indoor, and a conventional outdoor scenario where the channel gains follow a k-u generalized fading model. The objectives of this work is to analyze the downlink performance of this C-NOMA system and derive closed-form expressions for the outage probability (OP), ergodic capacity (EC), throughput and energy efficiency (EE) for the users assuming imperfect successive interference cancellation (SIC). In particular, the OP approach considers the individual users’ rate where it is required to satisfy certain quality of service (QoS) requirements. The results provide insights into the considered performance metrics relative to key parameters such as power allocation, power splitting factor, fading parameters, and residual interference. Extensive simulations results are presented to validate the accuracy of the derived expressions.</div>

Optimal Power Splitting in Two-Way Decode-and-Forward Relay Networks

2017 ◽  
Vol 21 (9) ◽  
pp. 2009-2012 ◽  
Author(s):  
Chunling Peng ◽  
Fangwei Li ◽  
Huaping Liu
Keyword(s):  
Relay Networks ◽  
Power Splitting ◽  
Decode And Forward ◽  
Optimal Power

scholarly journals Outage Probability Analysis in Relaying Cooperative Systems with NOMA Considering Power Splitting

Symmetry ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 72 ◽  
Author(s):  
Tran Ly ◽  
Hoang-Sy Nguyen ◽  
Thanh-Sang Nguyen ◽  
Van Huynh ◽  
Thanh-Long Nguyen ◽  
...  
Keyword(s):  
Outage Probability ◽  
Interference Cancellation ◽  
Transmission Rate ◽  
Relay Node ◽  
Destination Node ◽  
Power Splitting ◽  
Decode And Forward ◽  
Average Bit Error Probability ◽  
Half Duplex ◽  
System Operating

In recent years, non-orthogonal multiple access (NOMA) has become a promising technology for the advancement of future wireless communications. In principle, the relay node with better channel conditions can support others to enhance the system performance by using successive interference cancellation (SIC) technique. In this paper, we take advantage of NOMA in the study of a relaying cooperative system operating in half-duplex (HD) fixed decode-and-forward (DF) relaying scheme. In the two time slots, two data symbols are received at the destination node resulting in a higher transmission rate. Besides that, we study energy harvesting (EH) with power splitting (PS) protocol. For performance analysis, approximate and exact closed-form expressions for outage probability (OP) are obtained. Following that, we examine the average bit error probability (ABEP) while expressions for the throughput in delay-limited mode are given. It can be seen that our simulation results match well with the Monte Carlo simulations.

scholarly journals Two-hop cognitive DF relaying with wireless power transfer in time and power domains

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Lina Zheng ◽  
Chao Zhai
Keyword(s):  
Secondary Data ◽  
Access Point ◽  
Primary User ◽  
Primary Data ◽  
Secondary Source ◽  
Power Splitting ◽  
Decode And Forward ◽  
Transmit Power ◽  
Secondary Systems ◽  
Outage Probabilities

AbstractIn this paper, we consider a wireless powered cognitive relaying system with a secondary relay (SR) capable of harvesting wireless energy. Along with an access point (AP) continuously transmitting the primary data to a primary user (PU), a secondary source (SS) can transmit the secondary data to a secondary destination (SD) with the help of SR using the decode-and-forward (DF) protocol. SR can harvest energy from both SS and AP in both time and power domains using time-splitting and power-splitting techniques. The interference from primary data transmissions can help boost the amount of harvested energy at SR. The transmit power of SS is regulated by the interference threshold at PU and the allowable peak power. Despite the above two constraints, the transmit power of SR is further constrained by the amount of harvested energy. Once SR successfully decodes the data from SS, it will forward the data to SD using a constrained power. We analyze the approximate outage probabilities for both primary and secondary systems. Simulation results are provided to verify the effectiveness of our theoretical analysis and reveal the impacts of various parameters to the outage performance.

scholarly journals UAV-Enabled Cooperative NOMA with Indoor- Outdoor User-Paring and SWIPT in kappa-mu Channels

2021 ◽  
Author(s):  
Arafat Al-Dweik ◽  
Adel S. A. Alqahtani ◽  
Emad Alsusa
Keyword(s):  
Interference Cancellation ◽  
Performance Metrics ◽  
Ergodic Capacity ◽  
Power Splitting ◽  
Decode And Forward ◽  
Splitting Factor ◽  
Aerial Vehicle ◽  
The Individual ◽  
Generalized Fading Model

<div>This work presents a performance analysis on cooperative non-orthogonal multiple accesses (C-NOMA) when assisted with energy harvesting enabled unmanned aerial vehicle (UAV) decode-and-forward (DF) relaying. In particular, two scenarios are considered, an outdoor-indoor one, where the NOMA signal propagates through outdoor-to-indoor, and a conventional outdoor scenario where the channel gains follow a k-u generalized fading model. The objectives of this work is to analyze the downlink performance of this C-NOMA system and derive closed-form expressions for the outage probability (OP), ergodic capacity (EC), throughput and energy efficiency (EE) for the users assuming imperfect successive interference cancellation (SIC). In particular, the OP approach considers the individual users’ rate where it is required to satisfy certain quality of service (QoS) requirements. The results provide insights into the considered performance metrics relative to key parameters such as power allocation, power splitting factor, fading parameters, and residual interference. Extensive simulations results are presented to validate the accuracy of the derived expressions.</div>

Relay Selection-aware Non-orthogonal Multiple Access Networks: Direct and Relaying Mode

2020 ◽  
Vol 13 (3) ◽  
pp. 348-354
Author(s):  
Dinh-Thuan Do ◽  
Minh-Sang V. Nguyen
Keyword(s):  
Relay Selection ◽  
Multiple Access ◽  
Decode And Forward ◽  
Selection Scheme ◽  
Fixed Power ◽  
Transmission Quality ◽  
Improved Performance ◽  
Outage Probabilities ◽  
Future Work ◽  
The Impact

Objective: In this paper, Decode-and-Forward (DF) mode is deployed in the Relay Selection (RS) scheme to provide better performance in cooperative downlink Non-orthogonal Multiple Access (NOMA) networks. In particular, evaluation regarding the impact of the number of multiple relays on outage performance is presented. Methods: As main parameter affecting cooperative NOMA performance, we consider the scenario of the fixed power allocations and the varying number of relays. In addition, the expressions of outage probabilities are the main metric to examine separated NOMA users. By matching related results between simulation and analytical methods, the exactness of derived formula can be verified. Results: The intuitive main results show that in such cooperative NOMA networks, the higher the number of relays equipped, the better the system performance can be achieved. Conclusion: DF mode is confirmed as a reasonable selection scheme to improve the transmission quality in NOMA. In future work, we will introduce new relay selections to achieve improved performance.

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