SWIPT-NOMA机会协作系统的优化方案
Optimization scheme for the SWIPT-NOMA opportunity cooperative system
- 通信学报 2020年41卷第8期 页码：141-154
- 作者机构：
1. 广西大学计算机与电子信息学院，广西 南宁 530004
2. 南宁学院信息工程学院，广西 南宁 530299
3. 广西民族大学人工智能学院，广西 南宁 530005
- 作者简介：
[ "李陶深（1957- ），男，广西南宁人，博士，广西大学教授、博士生导师，主要研究方向为无线网络、无线携能通信、网络信息安全、大数据处理等" ]
[ "宁倩丽（1993- ），女，湖南邵东人，广西大学硕士生，主要研究方向为无线能量收集网络" ]
[ "王哲（1991- ），男，河南南阳人，博士，广西民族大学讲师，主要研究方向为能量收集网络、电力装备与智能信息技术" ]
- 基金信息：国家自然科学基金资助项目(61762010)
DOI：10.11959/j.issn.1000-436x.2020109
中图分类号： TP393-
网络首发：2020-08，
纸质出版：2020-08-25
- 稿件说明：
移动端阅览
李陶深, 宁倩丽, 王哲. SWIPT-NOMA机会协作系统的优化方案[J]. 通信学报, 2020,41(8):141-154.
Taoshen LI, Qianli NING, Zhe WANG. Optimization scheme for the SWIPT-NOMA opportunity cooperative system[J]. Journal on Communications, 2020, 41(8): 141-154.
李陶深, 宁倩丽, 王哲. SWIPT-NOMA机会协作系统的优化方案[J]. 通信学报, 2020,41(8):141-154. DOI： 10.11959/j.issn.1000-436x.2020109.
Taoshen LI, Qianli NING, Zhe WANG. Optimization scheme for the SWIPT-NOMA opportunity cooperative system[J]. Journal on Communications, 2020, 41(8): 141-154. DOI： 10.11959/j.issn.1000-436x.2020109.
摘要
为提高无线携能通信（SWIPT）系统的频谱效率和性能，引入非正交多址接入（NOMA）技术构建SWIPT-NOMA 机会中继系统模型。针对固定信号功率分配会导致其与系统其他参数无法相互调节，继而影响系统中断概率和资源利用率等问题，提出了一种联合信号功率和时间分配方案，以提高系统中断性能。所提方案在满足信道状态较差节点速率的条件下，推导出信号功率分配的表达式，并得出系统中断概率的数学表达式，最后通过选取合适的时间分配参数来提升中断性能。仿真结果表明，所提系统模型具有比正交多址接入（OMA）系统更好的中断性能，所提优化方案可有效降低系统的中断概率，提高系统性能。
Abstract
In order to improve the spectrum efficiency and performance of the simultaneous wireless information and power transfer (SWIPT) system
the non-orthogonal multiple access (NOMA) technology was introduced to construct the SWIPT-NOMA opportunistic relay system model.The fixed signal power allocation couldn’t adjust with other parameters of the system
and then affect the outage probability and resource utilization of the system.Therefore
a joint signal power and time allocation scheme was proposed to improve the system outage performance.In the proposed scheme
the expression of signal power distribution was obtained under the condition of satisfying the quality of service (QoS) rate of the node with poor channel state
and then the relation between the interruption probability and the time distribution of the system was deduced
the time allocation parameter was adjusted to affect the outage probability.The simulation results show that the constructed NOMA system has better outage performance than orthogonal multiple access (OMA) system
and the proposed joint signal power and time allocation outage scheme can effectively reduce the interruption probability of the system and improve the system performance.
关键词
Keywords
references
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