
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
Bandwidth of a Moving Average Filter posted on August 3, 2022
Single Pole IIR Filter Frequency Response posted on July 6, 2022
Folding a Polyphase Half Band Filter: Lemon Squeezer Style posted on October 6, 2021
Easy Guide to Logarithms and Decibels posted on July 20, 2022
Windowing Function Gain Normalization posted on January 1, 2025
Half Band Filter Design: Exceptional Filtering Efficiency! posted on September 27, 2021
Derivative of Sine and Cosine Using Euler’s Formula posted on April 6, 2022
Self Promotion: Engineer’s Worst Fear (Yikes!) posted on January 19, 2022
Square Root Raised Cosine Filter in Python posted on November 10, 2021








![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.