January 1, 0001

Pythonic Example for OFDM

Orthogonal Frequency Modulation Division (OFDM), is a popular multi carrier transmission system applied to many common wireless systems. Here, we show a simple python example of OFDM.

January 1, 0001

The Curious Case of Convolution and FFT

Convolution and its duality with multiplication in the Fourier domain forms the backbone of Digital Signal Processing (DSP), as well as wireless communication. Here, we develop that relation, assuming no pre-requisite besides an introductory course on calculus and some Linear Time Invariant (LTI) systems knowledge.

January 1, 0001

Visualising RF Spectrum

We consider visualisation of radio frequency (RF) waves in a practical context. We introduce notions of energy spectral density and power spectral density (PSD); and go on to analyse FM spectra in Chennai and a Wifi router.