基于S变换的悬停直升机旋翼回波检测  

Echo Detection of Hovering Helicopter Rotor Based on S Transform

作　　者：李亚军 黎文杰 王卓群 邵晟 LI Ya-jun;LI Wen-jie;WANG Zhuo-qun;SHAOSheng(Shanghai Radio Equipment Research Institute, Shanghai 200090, Chin)

机构地区：[1]上海无线电设备研究所,上海200090

出　　处：《制导与引信》2017年第4期27-32,共6页Guidance & Fuze

基　　金：国家自然科学基金;编号:61701309;上海市自然科学基金;编号:17ZR1428800

摘　　要：为准确、快速地检测悬停直升机的旋翼回波信号,针对旋翼回波信号持续时间短、突变快的特点,提出一种基于S变换的悬停直升机旋翼回波检测方法。仿真和实测数据处理结果表明,S变换能够以较高的时频分辨率表示直升机旋翼回波的非平稳特征,能反映出信号时频谱真实的物理意义。与传统的STFT、PWVD和SPWVD等时频分析方法相比,这种方法时频分辨率高,且不受交叉项干扰,具有更强的抗噪声能力。For detecting helicopter main rotor echo signal echo accurately and rapidly,a helicopter main rotor echo signal detection method based on the characteristics of echo short duration and fast mutation is proposed.Simulation and experimental results show that S transform can express the non-stationary characteristics of main rotor echo signal with good time-frequency resolution and show the real physical significance of signal time-frequency spectrum.Compared with traditional STFT,PWVD and SPWVD,the time-frequency resolution of this method is high,is not effected by cross items interference,and has good resistance noise ability.

关 键 词：旋翼回波 S变换 检测 

分 类 号：TN911.7[电子电信—通信与信息系统]