signalanalys
Signalanalys, or signal analysis, is the discipline that studies methods for extracting information from signals—functions that convey physical quantities such as sound, temperature, or voltage—over time or space. Signals can be continuous or discrete in time and may be one-dimensional or multi-dimensional. The aim is to characterize, transform, and interpret signals to reveal structure, patterns, or features while mitigating noise.
A central distinction is between time-domain and frequency-domain representations. In the time domain, signals are viewed
For non-stationary signals, time–frequency approaches are used, including the short-time Fourier transform (STFT), wavelet transforms, and
Applications span communications, audio and speech processing, radar and sonar, biomedical signals (ECG, EEG), image and