认知无线电具有时延约束的干扰功率分析

doi:10.13190/j.jbupt.2015.03.023

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (3): 130-134.doi: 10.13190/j.jbupt.2015.03.023

• 研究报告 • 上一篇

认知无线电具有时延约束的干扰功率分析

师向群¹, 褚庆昕²

1. 电子科技大学中山学院电子信息学院, 广东中山 528402;
2. 华南理工大学电子信息学院, 广州 510641

收稿日期:2014-08-04 出版日期:2015-06-28 发布日期:2015-06-26
作者简介:师向群(1968—), 女, 博士生, E-mail: xiangqun_shi@163.com; 褚庆昕(1958—), 男, 教授, 博士生导师.
基金资助:
国家自然科学基金项目(61171029)

Interference Power Analyses of Delay-Constrained Cognitive Radio Systems

SHI Xiang-qun¹, CHU Qing-xin²

1. School of Electronic and Information Engineering, University of Electronic Science and Technology of China, Zhongshan Institute, Guangdong Zhongshan 528402, China;
2. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China

Received:2014-08-04 Online:2015-06-28 Published:2015-06-26

摘要/Abstract

摘要：

为量化认知无线电队列时延与干扰功率之间的关系,提出一种功率分配方案. 此方案以最小化主用户接收端平均干扰功率为目标,受限于次用户时延服务质量约束. 推导非对称Nakagami-m衰落信道平均干扰功率闭合解. 仿真结果表明,干扰功率与时延约束之间存在折中. 当时延约束较严格时,认知无线电系统通过天线分集可显著降低次用户对主用户的干扰.

关键词: 认知无线电, 有效容量, 时延服务质量, 功率控制, Nakagami-m衰落

Abstract:

To quantify the relationships between the queuing-delay bound at the secondary user and the interference power to the primary receiver caused by the secondary user, a power allocation scheme was proposed for cognitive radio systems. The scheme aims at minimizing an average interference power subject to a delay-bound quality-of-service(QoS) constraint. The closed-form expression for an average interference power was obtained in asymmetric Nakagami-m fading channels. Simulations show that there exists a tradeoff between interference power and the delay-bound constraint. It is also shown that diversity-based cognitive radio systems can significantly reduce the interference power, especially under stringent delay-bound constraint.

Key words: cognitive radio, effective capacity, delay quality-of-service, power control, Nakagami-m fading

中图分类号:

TN929.5

师向群, 褚庆昕. 认知无线电具有时延约束的干扰功率分析[J]. 北京邮电大学学报, 2015, 38(3): 130-134.

SHI Xiang-qun, CHU Qing-xin. Interference Power Analyses of Delay-Constrained Cognitive Radio Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2015, 38(3): 130-134.

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认知无线电具有时延约束的干扰功率分析

Interference Power Analyses of Delay-Constrained Cognitive Radio Systems

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