The auto - spectrum is attached to linear phase , the amplitude - frequency drawing is got according to the arithmetic of bi - spectrum , then the equivalent is educed , the conversion relation is attained 该方法通过对自谱添加线性相位,根据双谱的数值估计算法计算获得双谱在三维空间的幅频图,通过推导双谱与自谱估计算法之间的等价关系以及所得的幅频图来实现两者之间的相互转换。
There are functions such as drawing the chart of amplitude - frequency and phase - frequency , calculating and displaying the highest peak value , the total sum of amplitude and the effective line - breadth of the signal in the program . so an effective technical means is supplied for the analysis of ultrasonic signal 软件系统具有幅频图及相频图的绘制、最高峰值、谐波系数及有效谱宽度的计算及显示等功能,从而为超声信号的频谱分析提供了极其有效的技术手段。
幅: width of cloth频: frequent图: picture; chart; drawing; map幅频: amplitude frequency调频图: frequency modulation chart; frequency-modulation chart光频图: spectrogram射频图: radio frequency chart; radio-frequency chart时频图: time-frequency plot视频图: video map幅频变换器: am-fm converter幅频分布: amplitude-frequency modulation幅频峰值法: peak value method幅频共调: simultaneous frequency and amplitude modulation幅频曲线: amplitudefrequency curve幅频失真: amplitude-frequency distortion幅频特性: amplitude-frequency characteristic◇幅频特性曲线 amplitude-versus-frequency curve幅频响应: amplitude-frequency re o e; amplitudefrequency response幅频一致性: amplitude-frequency equalization振幅频谱: amplitude frequency distribution; amplitude frequency spectrum; amplitude spectrum; amplitude-frequency distribution声频图像: audio image视频图匹配: video map matching视频图像: vi video image; video frame视频图象: video image视频图形: vg video gaphics; vg video graphics; video graphics对数幅频特性: log magnitude-frequency characteristics; log magnitude-phase diagram