认知无线电网络中基于主系统有限反馈的频谱共享方案

doi:10.3969/j.issn.1000-436x.2014.04.012

通信学报 ›› 2014, Vol. 35 ›› Issue (4): 103-111.doi: 10.3969/j.issn.1000-436x.2014.04.012

认知无线电网络中基于主系统有限反馈的频谱共享方案

高欢芹¹,宋荣方^1,²

¹ 南京邮电大学宽带无线通信与传感网技术教育部重点实验室，江苏南京210003
² 东南大学移动通信国家重点实验室，江苏南京210096

出版日期:2014-04-25 发布日期:2017-07-03
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;教育部博士点基金资助项目;东南大学移动通信国家重点实验室开放课题基金资助项目;江苏省研究生创新计划基金资助项目;江苏高校优势学科建设工程资助项目——“信息与通信工程”基金资助项目

Spectrum sharing scheme in cognitive radio networks based on primary limited feedback

Huan-qin1 GAO¹,Rong-fang SONG^1,²

¹ College of Telecommunication and Information Engineering, Nanjing University of Post and Telecommunication, Nanjing 210003, China
² National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Online:2014-04-25 Published:2017-07-03
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;Ph.D. Program Foundation of Minis-try of Education;Open Research Foundation of National Mobile Communication Research Laboratory, Southeast University;Graduate Innovation Program of Jiangsu Province;Priority Academic Program Development of Jiangsu Higher Education Institutions - Information and Communication Engineering

摘要/Abstract

摘要：

提出一种频谱共享方案，该方案适用于同时存在多个主用户和一对次用户的场景。各主用户依据接收机反馈的有限信道质量信息（CQI, channel quality information）分配发送功率及传输速率。次用户根据偷听到的主系统CQI有限反馈，以适当的功率及速率接入信道。次用户接入信道的行为对各主用户造成一定干扰，以致主系统传输速率遭受一定损失。在主系统速率损失约束条件下，得出了使次系统吞吐量最大化的次用户发送功率及传输速率最佳分配方案。数值结果表明，对于每个主用户仅需反馈3～4个量化比特，次系统的有效吞吐量就可堪比于主次发射端均拥有主系统链路完整CQI的情况。仿真结果显示，所提出的频谱共享方案能够满足主系统速率损失约束。

关键词: 认知无线电, 有限反馈, 速率损失约束, 频谱共享

Abstract:

A spectrum sharing scheme for a pair of secondary users co-existing with multiple primary users was proposed. The primary users exploit the limited feedback of channel quality information (CQI) to allocate their transmission power and rate. By overhearing the limited feedback of primary CQI, the secondary user accessed the channel with proper transmission power and rate while causing interference to the primary users and so the rate loss of the primary system. Under the primary rate loss constraint, the optimal transmit power and transmission rate for the secondary was obtained to maximize the secondary user throughput. Numerical results show that, with only 3 or 4 bits of feedback to each pri-mary user, the effective throughput of the secondary system is comparable to the case with both primary and secondary transmitters having the perfect CQI of the primary link. The simulation results demonstrate that the proposed spectrum sharing scheme can meet the primary rate loss constraint.

Key words: cognitive radio, limited feedback, rate loss constraint, spectrum sharing

高欢芹,宋荣方. 认知无线电网络中基于主系统有限反馈的频谱共享方案[J]. 通信学报, 2014, 35(4): 103-111.

Huan-qin1 GAO,Rong-fang SONG. Spectrum sharing scheme in cognitive radio networks based on primary limited feedback[J]. Journal on Communications, 2014, 35(4): 103-111.

图/表 8

图1

图2

图3

表1

图4

表2

次系统发射功率与传输速率( P th p =5dB,N0=0 dB)"

量化反馈比特个数	(P^s,R^s) (W,Nats/Sec/Hz)
0	$P_{0}^{s} = 0.3201$
	$R_{0}^{s} = 0.6611$
1	$P_{0}^{s} = 4.710 4$
	$R_{0}^{s} = 2.167 0$
	$P_{1}^{s} = 0.003 1$
	$R_{1}^{s} = 2.304 8$
2	$P_{0}^{s} = 4.509 8$
	$R_{0}^{s} = 2.312 6$
	$P_{1}^{s} = 0.351 7$
	$R_{1}^{s} = 2.216 9$
	$P_{2}^{s} = 0.050 1$
	$R_{2}^{s} = 0.915 5$
	$P_{3}^{s} = 0.000 0$
	$R_{3}^{s} = 0.599 8$
3	$P_{0}^{s} = 5.576 5$
	$R_{0}^{s} = 2.280 5$
	$P_{1}^{s} = 0.313 0$
	$R_{1}^{s} = 2.246 5$
	$R_{2}^{s} = 0.313 0$
	$R_{2}^{s} = 0.973 5$
	$P_{3}^{s} = 0.313 0$
	$R_{3}^{s} = 0.790 8$
	$P_{4}^{s} = 0.000 0$
	$R_{4}^{s} = 0.062 9$
	$P_{5}^{s} = 0.000 0$
	$R_{5}^{s} = 0.572 5$
	$P_{6}^{s} = 0.000 0$
	$R_{6}^{s} = 0.624 8$
	$P_{7}^{s} = 0.000 0$
	$R_{7}^{s} = 0.046 9$
4	$P_{0}^{s} = 6.463 9$
	$R_{0}^{s} = 2.408 2$
	$P_{1}^{s} = 0.223 7$
	$R_{1}^{s} = 2.136 2$
	$P_{2}^{s} = 0.184 7$
	$R_{2}^{s} = 1.913 6$
	$P_{3}^{s} = 0.102 1$
	$R_{3}^{s} = 1.052 5$
	$P_{4}^{s} = 0.086 3$
	$R_{4}^{s} = 0.798 9$
	$P_{5}^{s} = 0.021 6$
	$R_{5}^{s} = 0.551 4$
	$P_{6}^{s} = 0.011 4$
	$R_{6}^{s} = 0.803 5$
	$P_{7}^{s} = 0.006 3$
	$R_{7}^{s} = 0.726 1$
	$P_{8}^{s} = 0.006 3$
	$R_{8}^{s} = 0.904 2$
	$P_{9}^{s} = 0.006 3$
	$R_{9}^{s} = 0.315 7$
	$P_{10}^{s} = 0.006 3$
	$R_{10}^{s} = 0.876 7$
	$P_{11}^{s} = 0.006 3$
	$R_{11}^{s} = 0.001 7$
	$P_{12}^{s} = 0.000 0$
	$R_{12}^{s} = 0.511 8$
	$P_{13}^{s} = 0.000 0$
	$R_{13}^{s} = 0.509 6$
	$P_{14}^{s} = 0.000 0$
	$R_{14}^{s} = 0.754 8$
	$P_{15}^{s} = 0.000 0$
	$R_{15}^{s} = 0.001 7$

表2

图5

图6

参考文献 14

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反馈比特个数	量化区间数L	各量化级门限值
0	1	γ₀=0.745 5
1	2	γ₀=0.442 2
		γ₁=1.284 6
2	4	γ₀=0.516 7
		γ₁ 1.189 4=
		γ₂=1.357 9
		γ₃=2.703 5
3	8	γ₀=0.232 5
		γ₁=0.368 5
		γ₂=0.588 6
		γ₃=0.868 8
		γ₄=1.241 1
		γ₅=1.761 5
		γ₆=2.554 4
		γ₇=4.007 8
4	16	γ₀=0.199 2
		γ₁=0.269 8
		γ₂=0.378 0
		γ₃=0.507 2
		γ₄=0.671 2
		γ₅=0.860 2
		γ₆=1.080 0
		γ₇=1.351 8
		γ₈=1.597 0
		γ₉=1.981 8
		γ₁₀=2.516 5
		γ₁₁=3.063 5
		γ₁₂=4.155 4
		γ₁₃=5.361 6
		γ₁₄=6.394 9
		γ₁₅=8.782 6

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认知无线电网络中基于主系统有限反馈的频谱共享方案

Spectrum sharing scheme in cognitive radio networks based on primary limited feedback

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