西安电子科技大学学报（自然科学版）2018，Vol.45Issue(1)：123-128,6.DOI:10.3969/j.issn.1001-2400.2018.01.022
改进Chirplet时频原子的非线性调频信号分解
Non-linear frequency modulated signal decomposition based on the improved chirplet time-frequency atom
摘要
Abstract
Regarding the deficiencies that the Chirplet time-frequency atom has weak decomposition performance to non-linear frequency modulation signal of a sine type, an improved Chirplet atom (IChirplet) is proposed.First,it is analyzed that the Chirplet atom has a mismatch with time-frequency distribution of the non-linear signal. Then, a sine frequency modulation factor is introduced into the Chirplet atom to make the atom time-freqency curve have sine similarity bending performance.Finally,the matching pursuit algorithm is replaced by the genetic algorithm to improve the efficiency of atom searching. Simulation results show that the improved Chirplet atom has better decomposition performance to the non-linear frequency modulated signal compared with the Gabor,Chirplet,and FM mlet atom.关键词
时频原子/非线性调频信号/时频分布/遗传算法Key words
time-frequency atom/non-linear frequency modulated signal/time-frequency distribution/genetic algorithm分类
信息技术与安全科学引用本文复制引用
呙鹏程,王星,程嗣怡,汪峰..改进Chirplet时频原子的非线性调频信号分解[J].西安电子科技大学学报（自然科学版）,2018,45(1):123-128,6.基金项目
航空科学基金资助项目(20152096019,20145596025) （20152096019,20145596025）
