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、負偶（單）極強迫源對中高緯大氣的低頻振蕩調制作用不同。
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.
該方法通過FFT和餘數定理解頻率模糊，解決了負信噪比條件下超寬帶線性調頻信號調制斜率和初始頻率的估計問題。
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（單）極強迫源對大氣低頻振蕩的調制作用強於負偶（單）極，波動振蕩明顯加快。