东南大学学报（英文版）2020，Vol.36Issue(3)：245-251,7.DOI:10.3969/j.issn.1003-7985.2020.03.001
多信道协作认知无线电上报信道错误下的吞吐量优化
Throughput optimization for multi-channel cooperative CR under reporting channel errors
摘要
Abstract
To overcome the problem of channel fading and noise uncertainty,cooperative spectrum sensing (CSS) is developed to enhance the sensing performance in cognitive radio networks (CRNs).Considering that the non-ideal reporting channels of CSS can cause an adverse impact on the detection performance,the throughput maximization problem for multi-channel CSS cognitive radio under reporting channel errors is investigated.While providing all the primary users with sufficient protection,the average throughput of secondary users (SUs) is maximized by jointly optimizing the sensing duration,detection threshold and SU assignment.To address the non-convex optimization problem,the optimal energy detection threshold is derived first.Then,a sub-optimal greedy algorithm is proposed to obtain the optimal sensing duration and the optimal SU assignment.Analysis and simulation results show that the proposed algorithm can output the same performance as the exhaustive search algorithm at a much lower level of complexity.It is also shown that the impact of imperfect reporting channels should be considered especially in low signal-to-noise ratio environments and the reporting channel errors significantly reduce the performance of CSS.关键词
认知无线电/多信道/协作频谱感知/上报信道错误Key words
cognitive radio/multi-channel/cooperative spectrum sensing/reporting channel errors分类
信息技术与安全科学引用本文复制引用
王聪,蒋伟,宋铁成,鲍煦,胡静..多信道协作认知无线电上报信道错误下的吞吐量优化[J].东南大学学报（英文版）,2020,36(3):245-251,7.基金项目
The National Natural Science Foundation of China (No.61771126),the Key Research and Development Plan of Jiangsu Province (No.BE2018108). （No.61771126）
