Wave Walker DSP

DSP Algorithms for RF Systems

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Introduction to Interpolation and Upsampling posted on September 1, 2022
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
Complex Frequency Shifting in Discrete Time posted on January 1, 2023

New Book!

The third edition of DSP for Beginners: Simple Explanations for Complex Numbers! Includes a new chapter on sampling.

DSP for Beginners cover

Euler's formula

Negative frequency in complex sinusoids

Complex sinusoids on the complex plane

Aliasing

Phase relationship between sine and cosine

Rodney Dangerfield and DSP

December 15, 2021

I came across this GIF of Rodney Dangerfield and saw the unit circle in the bottom right hand corner:

Always nice to see elements of DSP sprinkled into the real world!

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