Signal Processing for Intelligent Sensor Systems with MATLAB, 2nd Edition

Part II

Frequency Domain Processing

Frequency domain processing of signals is an essential technique for extracting signal information with physical meaning as well as a filtering technique for enhancing detection of periodic signal components. The genesis of frequency domain techniques dates back to the later half of the nineteenth century when Fourier (pronounced “4-E-A”) published a theory which suggested that any waveform could be represented by an infinite series of sinusoids of appropriate amplitudes and phases. This revolutionary thought led to the mathematical basis for many fundamental areas in physics such as diffraction theory and optics, field theory, structural vibrations, and acoustics, just to name a few. However, it was the ...