Outage probability

In this study, we suggested an FSO system with RIS assistance to mitigate the effects of signal blockage in the communication system, atmospheric turbulence, and UAV’s misalignment-induced fading. In a free-space environment with obstacles, the probability density function and cumulative distribution functions of an FSO system made up of RIS are derived.

8p vithomson 02-07-2024 0 0   Download

This paper investigates the system performance of hybrid time-power switching based relaying (TPSR) energy harvesting enabled in the multisource half-duplex relaying network over the Rayleigh fading channel. The outage probability (OP) of the proposed system model with implementing maximal ratio combining (MRC) and selection combination (SC) technique at the receiver is presented and analyzed.

8p viwalton 02-07-2024 1 1   Download

In this paper, the performance of a multisource half-duplex relaying network utilizing the time-switching approach is investigated. Particularly, the relay simply relies on the harvested energy from the selected source to perform its operations such as amplifying and forwarding the source signals.

8p viwalton 02-07-2024 2 1   Download

A proposed artificial noise (AN) injection strategy is considered in amplify-and-forward (AF) relaying systems. The limit of secrecy rate, hence the resulting zero-outage secrecy throughput, is determined subject to guarantee zero secrecy outage toward any powerful eavesdropper.

8p viambani 18-06-2024 2 1   Download

Bài viết "Hiệu năng của mạng đơn chặng sử dụng mã fountain dưới sự tác động của nhiều nguồn giao thoa đồng kênh" nghiên cứu về mạng truyền thông vô tuyến đơn chặng sử dụng mã Fountain, với sự ảnh hưởng của nhiều nguồn nhiễu đồng kênh (co-channel interference sources). Chúng tôi xây dựng công thức tính tỉ số tín hiệu trên nhiễu và giao thoa (interference-plus-noise ratio) và hiệu năng của hệ thống được phân tích dựa vào biểu thức dạng tường minh (closed-form expression) của xác suất dừng (outage probability) trên kênh pha đinh Rayleigh.

5p phocuuvan0201 02-02-2024 4 0   Download

In this paper, we propose down-link nonorthogonal multiple access (NOMA) networks for multiple users with energy harvesting (EH). Over Rayleigh fading channels, we derive the closed form expression for the system outage probability (OP).

7p viannee 02-08-2023 10 4   Download

In this paper, we investigate the physical layer security technique of a cooperative communication network with a source node having multiple transmitting antennas, in which these antennas provide the most optimal antenna to increase security performance to a destination node via a relay node in the presence of an eavesdropper node.

9p vidoctorstrange 06-05-2023 3 2   Download

In practice, fading channel coefficients are estimated imperfectly at receivers. In this paper, I propose and analyze a cooperative communication scheme under physical layer security with imperfect CSI. In this scheme, a source node transmits secure data to a destination node D with a help of a relay node against an eavesdropper node without direct links of source-destination and source-eavesdropper.

6p vidoctorstrange 06-05-2023 2 2   Download

In this paper, an approach method to improve secrecy cooperation transmissions using combined signals is investigated in which data and jamming signals are combined at a source node based on power allocation strategy. The secrecy system performances are evaluated using asymptotic secrecy outage probabilities of end-to-end achievable secrecy rates over flat and block Rayleigh fading channels.

9p vidoctorstrange 06-05-2023 7 2   Download

In this article, we derive the exact performance expressions of the system performance in terms of outage probability and ergodic capacity for multi-user of a downlink non-orthogonal multiple access (NOMA) systems with a full-duplex decode-and-forward relay R over the Nakagami-m fading channels.

19p viargus 20-02-2023 7 2   Download

Bài viết "Đánh giá khả năng bảo mật của hệ thống FD-NOMA khi xuất hiện nhiều nút nghe lén" đề xuất mô hình và đánh giá khả năng bảo mật của hệ thống chuyển tiếp song công (FD: Full-duplex) và đa truy nhập không trực giao (NOMA: non-orthogonal multiple access). Thông số sử dụng để đánh giá là xác suất dừng bảo mật (SOP: Secrecy outage probability) trong điều kiện ràng buộc nhiều nút nghe lén không kết hợp và thông tin trạng thái kênh truyền không hoàn hảo.

3p lieuyeuyeu18 23-12-2022 18 5   Download

In this paper, new energy harvesting-based transmission schemes are proposed to improve the outage probability and throughput in underlay cognitive radio networks. In this system, a secondary source can harvest energy from a power beacon (PB) and/or a primary transmitter (PT) to transmit data to a secondary destination in the presence of a primary receiver.

7p vimelindagates 18-07-2022 8 4   Download

Bài viết đánh giá hiệu năng bảo mật của mạng vô tuyến nhận thức chuyển tiếp đa chặng sử dụng kỹ thuật lựa chọn nút chuyển tiếp tốt nhất tại mỗi chặng. Cụ thể, chúng tôi đưa ra các biểu thức xác suất dừng bảo mật - Secure Outage Probability (SOP) và dung lượng bảo mật khác không - Probability of Non-zero Secrecy Capacity (PrNZ) cho giao thức chuyển tiếp ngẫu nhiên-và-chuyển tiếp - Randomize-and-Forward (RF) sử dụng kỹ thuật lựa chọn nút chuyển tiếp tốt nhất ở mỗi chặng.

5p wangziyi_1307 26-04-2022 42 4   Download

Bài báo này nghiên cứu hiệu năng của kỹ thuật đa truy cập không trực giao (NonOrthogonal Multiple Access – NOMA) trong thông tin vô tuyến. Đây là kỹ thuật được ứng dụng hiệu quả trong mạng 5G và hứa hẹn sẽ là ứng viên tiềm năng được sử dụng trong mạng 6G. Trong bài báo này, hiệu năng của NOMA được đánh giá qua giá trị tỉ lệ lỗi bit (Bit Error Rate – BER), tốc độ dữ liệu và xác suất dừng (Outage Probability – OP).

10p paddington36 04-01-2022 51 6   Download

In recent years, cognitive relay networks (CRNs) have emerged as a fantastic trend in research. It supports the establishment of a new communication network by spectrumsharing technique. However, most papers focus on studying the performance of the dual-hop scheme. This paper evaluates the proposed multi-hop model by giving the closed-form multihop network outage (OP). Simulation verifies our derivation and discovers the impact of several related factors on the secondary outage probability.

8p trinhthamhodang1219 06-05-2021 25 1   Download

In this paper, we analyze an underlay two-way decode-and-forward scheme in which secondary relays use successive interference cancellation (SIC) technology to decode data of two secondary sources sequentially, and then generate a coded signal by superposition coding (SC) technology, denoted as SIC-SC protocol. The SIC-SC protocol is designed to operate in two time slots under effects from an interference constraint of a primary receiver and residual interference of imperfect SIC processes.

15p nguaconbaynhay11 07-04-2021 23 2   Download

In the recent era, unmanned aerial vehicle (UAV) plays an important role in numerous application fields related to the wireless communication system. Due to its precise control, efficient deployment, and affordable cost, UAV-assisted communication attracts significant attention to all the sectors including the defense sector, agriculture sector, and security purpose, and so on.

8p nguaconbaynhay11 07-04-2021 11 1   Download

In these systems, a source node can communicate with a destination node directly or via the selected relay nodes, while relay nodes harvest energy from radio frequency for forwarding the received signal. In addition, the decode and forward (DF) protocol is applied to relay nodes, and selection combination technique is employed at the destination in order to select the best relay node. The system performance is presented by outage probability expressions over independent and identically distributed (i.i.d) Nakagami-m channel model.

14p trinhthamhodang1218 04-03-2021 11 4   Download

In this paper, we analyze performance of the Full Duplex (FD) Decode-and-Forward relay network using Spatial Modulation (SM) technique, called SM-FD relay network, in the presence of Residual Self-Interference (RSI) due to imperfect Self-Interference Cancellation (SIC). Based on mathematical calculation, the exact expressions of Outage Probability (OP), Symbol Error Probability (SEP) and Ergodic Capacity of the SM-FD relay network is derived over Rayleigh fading channel

15p trinhthamhodang1218 04-03-2021 13 1   Download

– In this paper, we study the throughput and outage probability (OP) of two-way relaying (TWR) communication system with energy harvesting (EH). The system model consists two source nodes and a relay node which operates in full-duplex (FD) mode. The effect of self-interference (SI) due to the FD operation on the system performance is evaluated for both one-way full duplex (OWFD) and two-way full duplex (TWFD) diagrams where the amplify-and-forward (AF) relay node collects energy harvesting with the time switching (TS) scheme.

15p trinhthamhodang9 10-12-2020 29 1   Download