通信学报2024，Vol.45Issue(5)：115-127,13.DOI:10.11959/j.issn.1000-436x.2024096
基于增强梯度算子的软阈值宽带频谱感知算法
Soft threshold wideband spectrum sensing algorithm based on enhanced gradient operator
摘要
Abstract
In order to improve the amplitude loss of signal gradient features and seek the optimal scale of signal descrip-tion,a soft threshold wideband spectrum sensing algorithm based on enhanced gradient operators was proposed.By intro-ducing the gradient enhancement operator to restore the signal amplitude,combining the gradient characteristics of the signal itself,using different scales to describe the gradient increment of the signal,the soft threshold criterion was ob-tained.The scale fusion unit was further added,and the best scale of the description signal was obtained by using the joint judgment of hard threshold and soft threshold.Theoretical analysis and simulation results show that the detection probability and false alarm probability of the proposed algorithm are significantly improved and less complex than MPSG algorithm in Gaussian channel and Rayleigh fading channel.By comparing the detection effect of actual data,the proposed algorithm is more suitable for practical engineering.关键词
频谱感知/增强梯度算子/软阈值/尺度融合Key words
spectrum sensing/enhanced gradient operator/soft threshold/scale fusion分类
信息技术与安全科学引用本文复制引用
巩克现,房家乐,刘宏华,孙鹏,王玮..基于增强梯度算子的软阈值宽带频谱感知算法[J].通信学报,2024,45(5):115-127,13.基金项目
国家自然科学基金资助项目(No.61901417) （No.61901417）
国家重点研发计划基金资助项目(No.2019QY0302) （No.2019QY0302）
河南省科技攻关计划基金资助项目(No.242102211107) The National Natural Science Foundation of China(No.61901417),The National Key Research and Develop-ment Program of China(No.2019QY0302),The Key Technologies Research and Development Program of Henan Province(No.242102211107) （No.242102211107）
