
Introduction to Interpolation and Upsampling posted on September 1, 2022
Calculate Signal to Noise Ratio (SNR) in Python Simulation posted on July 1, 2024
Windowing Functions for Better Spectral Analysis posted on August 1, 2023
Complex Frequency Shifting in Continuous Time posted on December 1, 2022
Single Pole IIR Filter: Substitute for Moving Average Filter posted on August 10, 2022
Using Euler’s Formula to Derive Sine and Cosine posted on November 24, 2021
Building a PSK and QAM Modulator in Python posted on June 8, 2022
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
How Euler’s Formula Relates Triangles, the Unit Circle and Complex Sinusoids posted on September 16, 2021
Oppenheim DSP Lectures YouTube Video Playlist posted on March 23, 2022








![A BPSK signal s[n], real Gaussian noise w[n], and the received signal x[n] = s[n] + w[n] for SNR = 20 dB](https://www.wavewalkerdsp.com/wp-content/uploads/2023/12/HowToComputeSignalToNoiseRatioSNRInSimulation_signalNoiseTimeDomain-300x240.png)
The third edition of DSP for Beginners: Simple Explanations for Complex Numbers! Includes a new chapter on sampling.