信号分析和可视化 -凯发k8网页登录

使用信号分析器来可视化、预处理和探查信号

信号分析器是一款交互式工具，用于在时域、频域和时频域中可视化、测量、分析和比较信号。通过该 app 可同时和在同一视图中处理不同持续时间的许多信号。

从 matlab^® 工具条上的 apps 选项卡中选择该 app 将其启动。您也可以通过在 matlab 命令提示符下键入 signalanalyzer 来启动该 app。

app

可视化和比较多个信号和频谱

带状图

to compute signal spectra, signal analyzer finds a compromise between the best theoretical spectral resolution and the best resolution allowed by performance constraints.
the persistence spectrum contains time-dependent probabilities of occurrence of signals at given frequency locations and power levels.
为了显示非平稳信号的时间依赖频谱，信号分析器将信号分成若干重叠的 kaiser 窗段，并计算其短时傅里叶变换。
the scalogram is useful for identifying signals with low-frequency components and for analyzing signals whose frequency content changes rapidly with time.

signal analyzer accepts vectors and matrices, timeseries objects, and matlab timetables.
you can add and edit the time information in the signal analyzer app for any signal that is not a matlab timetable or a timeseries object.
prepare data to circumvent current limitations of signal analyzer.
use the keyboard to control the signal analyzer app.
specify line color and style, add or remove columns in the signal table, and modify signal analyzer displays.

use signal analyzer to extract voices from a song by duplicating and filtering signals.