1) frequency code signal
频率码信号
2) FSK signal
频率编码信号
1.
Aimed at the shortcomings that the SNR of wavelet-ridge applied to extracting the modulation features of FSK signals is worse,a novel joint time-frequency analytical method was proposed combining time-frequency reassignment with time-frequency ridge based on the wavelet spectrum.
针对小波脊线法在提取频率编码信号调制特征时信噪比性能较差的缺点,基于小波变换谱,将时频重排和时频脊线相结合,提出了一种新的时频联合分析方法。
2.
Aiming at the shortage of wavelet transform in extracting in-pulse features from FSK signal,a united time-frequency analyse method combined with time-frequency reassignment and time-frequency ridge is introduced.
针对小波变换法在提取频率编码信号脉内特征中的不足,提出了将时频重排和时频脊线相结合的时频联合分析方法。
3.
It is hard to improve the SNR of FSK signal by direct use of wavelet de-noising.
对频率编码信号直接进行小波去噪难以达到提高信噪比的目的,为了有效提高频率编码信号的信噪比,提出一种新的去噪方法。
3) coded pulse signal
编码频率信号
5) stepped-frequency polyphase code modulation signal
频率步进多相编码信号
6) signal frequency
信号频率
1.
Comparison of wavelet transform and Fourier transform in analyzing signal frequency;
小波变换和傅立叶变换在信号频率分析中的比较
2.
The relation between signal frequency and measured velocity variation and the largest velocity variation,which can be responded by photomultiplier and digital oscilloscope in the VISAR application are discussed.
论述了ＶＩＳＡＲ测速中信号频率与被测速度增量的关系和光电倍增管、数字示波器所能响应的最高速度增量。
补充资料：频率编码
频率编码
磁共振成像术语。磁共振成像中，为确定选择层面内自旋的位置，在与层面选择梯度场垂直的方向再施加一梯度场(频率编码梯度)，形成一个从低到高的频率阶梯，即在该梯度场相垂直方向形成一系列平行的等频率线，即频率编码这一系列等频率线的自旋位置可再由相位编码梯度决定。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条