Subject
4 entries
Signal Processing
Bookmarks
GPS: How the Global Positioning System Works
Bartosz Ciechanowski's interactive explainer on how GPS works — from trilateration fundamentals through satellite orbital design, pseudorandom codes, and relativistic clock corrections. One of the best pieces of technical writing on the web.
How a Kalman Filter Works, in Pictures
The clearest visual explanation of how a Kalman filter works — building from Gaussian distributions to the prediction-update cycle without losing the intuition in the math. A reference that makes the algorithm genuinely understandable rather than just computable.
Digital Sound Processing Tutorial for the Braindead
Olli Niemitalo's 1998 beginner DSP tutorial covering filters, FFT, interpolation, and audio synthesis techniques. Honest about its approximations but remains a clear, practical entry point into audio signal processing.
A Primer on Cheap Software Defined Radios
Yuval Adam's 2012 primer on cheap software-defined radios using the RTL-SDR USB dongle — a $20 TV tuner repurposed as a 24MHz–1766MHz radio receiver. Triggered an explosion of hobbyist RF experimentation that continues today.