negative frequency modulation

基本解释

The frequency modulation effects of positive (negative) dipole or unipole forcing source on LFO in the mid-high latitudes are difference.
正、负偶（单）极强迫源对中高纬大气的低频振荡调制作用不同。
In addition, based on FFT and remainder algorithm, the modulation rate and initial frequency of sub-sampling UWB LFM signal are estimated unambiguously in negative SNR.
该方法通过FFT和余数定理解频率模糊，解决了负信噪比条件下超宽带线性调频信号调制斜率和初始频率的估计问题。
The frequency modulation effects of positive dipole (unipole) forcing source on LFO is stronger than negative dipole (unipole), and the wave oscillation quicken evidently.
正偶（单）极强迫源对大气低频振荡的调制作用强于负偶（单）极，波动振荡明显加快。