You might have heard of complex numbers before -- but what's the actual significance of i = √-1?| lcamtuf’s thing
Dissing Fourier, exploring the Hadamard-Walch transform, and making square-wave spectrograms.| lcamtuf.substack.com
A brief introduction to antennas, superheterodyne receivers, and signal modulation schemes.| lcamtuf.substack.com
My Substack articles| lcamtuf.coredump.cx