
Introduction to Interpolation and Upsampling posted on September 1, 2022
Bandwidth of a Moving Average Filter posted on August 3, 2022
Derivative Filter Impulse Response Derivation posted on November 24, 2021
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
Can the Fourier Transform Magnitude Be Negative? posted on February 16, 2022
Windowing Functions for Better Spectral Analysis posted on August 1, 2023
Calculate Signal to Noise Ratio (SNR) in Python Simulation posted on July 1, 2024
Building a PSK and QAM Modulator in Python posted on June 8, 2022
Designing an FIR High Pass Filter with Remez posted on September 23, 2021
Designing FIR Filter Gain posted on February 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.