frequency of modulation中文是什么意思

• 调剂频率

• frequency    n. 1.屡次，频仍，频繁。 2.(脉搏等的)次数，出现 ...
• modulation    n. 调整，调节；(声调的)抑扬，变化；【音乐】转调，变 ...
• frequency modulation    【电学】调频，频率调制；调频播送。
• frequency-modulation    频率调制
• modulation frequency    灯频率; 调频; 调制频率
• frequency modulation phase modulation    调频调相
• frequency-modulation and voice frequency    调频与音频
• frequency-modulation frequency converter    频率调制与转换
• afm advance frequency modulation    高级调频
• amplitude frequency modulation    振幅频率调制
• amplitude-frequency modulation    幅频分布
• analog frequency modulation system    模拟调频制
• armstrong frequency-modulation system    阿姆斯特朗调频系统
• audio-frequency shift modulation    音频频移调制
• balanced frequency modulation detector    平衡调频检波器
• beam modulation frequency    束流调制频率
• binary frequency modulation    二进制调频
• broad-band frequency modulation    宽带频率调制
• center frequency modulation    中心频率调制
• cfm center frequency modulation    中心频率调制
• cfm companded frequency modulation    缩展频率调制
• coefficient of frequency modulation    调频系数
• depth of frequency modulation    频率调制深度
• direct frequency modulation    直接调频
• direct frequency modulation system    直接调频制

• Since the energy of 18 - information track signal is concentrated around upper frequency and lower frequency , the frequency of the modulation signal is low , and it must have high resolution , we use zfft to detect it . as the energy of um - 71 signal is more concentrated , we use extreme value method to detect the frequency of modulation signal in frequency domain , which can satisfy the frequency resolution
  针对18信息轨道信号能量集中在上、下边频附近且低频信息频率低的情况,提出了用zoom - fft ( zoom指频率扩展或细化,简称zfft )算法进行信号的局部放大检测低频信息,以提高信号的频率分辨率,而um - 71轨道信号能量集中在载频附近,在频域上采用极值法检测低频信息,即可满足信号频率分辨率的要求。