time frequency transform 时频原子变换 ; 提出基于时频原子变换
SPW time-frequency transform SPW时频变换
time-frequency transform domain 时频变换域
bilinear time-frequency transform 双线性时频变换
Adaptive Joint Time-Frequency transform 自适应联合时频变换
Fast Polynomial Time Frequency Transform 快速多项式时频变换
high-resolution time-frequency transform 高分辨时频变换
This paper is mainly based on the theory of time-frequency transform to estimate the parameter of LFM signal, and dechirping is also used to deal with the problem.
本文就是主要基于时频变换以及时域方法对LFM信号的参数进行估计。
参考来源 - 地波辐射源的调制类型识别与参数估计The time domain methods have a better time-saving character compared to the time-frequency transform, and take better practical values.
同已有的时频分析方法相比,时域方法在计算时间上具有明显优势,具有一定的工程价值。
参考来源 - 地波辐射源的调制类型识别与参数估计·2,447,543篇论文数据，部分数据来源于NoteExpress
Bilinear time-frequency transform possesses a high resolution both in the time domain and the frequency domain. It can be utilized to detect weak transient signal in complex background.
双线性时间-频率变换在时间域与频率域都具有较高的分辨率，有利于复杂背景条件下微弱瞬时信号的探测。
By digital simulation and detection of gearbox fault signal the detection effect of the novel bilinear time-frequency transform is validated for the transient components in complex signal.
通过数字模拟实验与齿轮箱故障信号检测，验证了新的双线性时间-频率分布对复杂信号中瞬时分量的探测效果。
Wavelet transform involves the two-variate function of frequency and time, which makes it convenient to simultaneously compensate for attenuation of seismic energy in frequency and time domains.
小波变换作为频率和时间的二元函数，使之可以很方便地在频率和时间域中同时进行地震波能量的吸收衰减补偿。
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