Signals and Systems: The Math Underneath Microphones, Cameras, Robots and Radar
blaizedsouza · x · 2026-09-11
The author argues nearly every modern machine is signals moving through systems: microphones turn pressure into voltage, cameras turn light into pixels, IMUs turn motion into measurements, controllers turn error into commands.
He points to Alan V. Oppenheim's Signals and Systems as the math foundation: convolution, Fourier and Laplace transforms, sampling, frequency response, linear systems.
The core idea — input → system → output — connects audio, communications, robotics, control, computer vision, radar and electronics. Once you see sensor readings as information evolving through mathematical systems, entire fields start clicking together.
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