On Outage Performance and Ergodic Capacity Analysis of Two User NOMA in a Cooperative Cognitive Radio Network With an Energy Harvesting Relay

IF 1.7 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Communication Systems Pub Date : 2025-02-24 DOI:10.1002/dac.70015

Alok Baranwal, Hritwika Sarkar, Shashibhushan Sharma, Sumit Kundu

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引用次数: 0

Abstract

In this paper, a dual-hop cooperative nonorthogonal multiple access (NOMA) scheme is investigated in which two independent sources communicate simultaneously with their respective destinations over Rayleigh fading channel sharing a common time switching relay (TSR)-based energy harvesting decode and forward (DF) relay in an underlay cognitive radio network (CRN). A TSR protocol is used at the relay for harvesting energy from the signals of the two sources. After successful decoding the symbols of the sources using successive interference cancellation (SIC), the relay transmits a superposition coded (SC) composite signal to the destinations following downlink NOMA where SIC is performed at the destinations. Novel analytical expressions on outage probability of each user pair, system outage probability, and ergodic capacity of each user pair are derived. The transmit power allocation of each source satisfying an outage constraint of PU is obtained by solving a transcendental equation. A statistical distribution of the power harvested at the relay from two independent sources is also presented. Impact of tolerable interference threshold at the PU receiver, constraint on PU outage is indicated on outage and ergodic capacity of users. Monte Carlo simulation is performed using a testbed developed in MATLAB, and simulation results agree well with analytical results.

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带能量收集中继的协同认知无线网络中两用户NOMA的中断性能和遍历容量分析

本文研究了一种双跳合作非正交多址（NOMA）方案，该方案在认知无线网络（CRN）中，两个独立的信源通过瑞利衰落信道与各自的目的地同时通信，共享一个基于通用时间交换中继（TSR）的能量收集解码和转发（DF）中继。在中继上使用TSR协议从两个源的信号中收集能量。在使用连续干扰消除（SIC）成功解码源的符号后，中继发送叠加编码（SC）复合信号到目的地，随后下行链路NOMA在目的地执行SIC。导出了各用户对中断概率、系统中断概率和各用户对遍历容量的解析表达式。通过求解一个超越方程，得到满足PU中断约束的各源发射功率分配。本文还介绍了从两个独立电源中获得的继电器功率的统计分布。PU接收端可容忍干扰阈值、PU中断约束对用户中断和遍历容量的影响。利用MATLAB开发的实验平台进行蒙特卡罗仿真，仿真结果与分析结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Communication Systems 工程技术-电信学

CiteScore

5.90

自引率

9.50%

发文量

323

审稿时长

7.9 months

期刊介绍： The International Journal of Communication Systems provides a forum for R&D, open to researchers from all types of institutions and organisations worldwide, aimed at the increasingly important area of communication technology. The Journal''s emphasis is particularly on the issues impacting behaviour at the system, service and management levels. Published twelve times a year, it provides coverage of advances that have a significant potential to impact the immense technical and commercial opportunities in the communications sector. The International Journal of Communication Systems strives to select a balance of contributions that promotes technical innovation allied to practical relevance across the range of system types and issues. The Journal addresses both public communication systems (Telecommunication, mobile, Internet, and Cable TV) and private systems (Intranets, enterprise networks, LANs, MANs, WANs). The following key areas and issues are regularly covered: -Transmission/Switching/Distribution technologies (ATM, SDH, TCP/IP, routers, DSL, cable modems, VoD, VoIP, WDM, etc.) -System control, network/service management -Network and Internet protocols and standards -Client-server, distributed and Web-based communication systems -Broadband and multimedia systems and applications, with a focus on increased service variety and interactivity -Trials of advanced systems and services; their implementation and evaluation -Novel concepts and improvements in technique; their theoretical basis and performance analysis using measurement/testing, modelling and simulation -Performance evaluation issues and methods.