
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
Introduction to Interpolation and Upsampling posted on September 1, 2022
Half Band Filter Design: Exceptional Filtering Efficiency! posted on September 27, 2021
Fourier Transform Pairs of Conjugation and Time Reversal posted on November 17, 2021
Efficient Real to Complex Conversion with a Half Band Filter posted on December 15, 2021
Using Euler’s Formula to Derive Sine and Cosine posted on November 24, 2021
Time Invariant and Time Varying Filters posted on September 3, 2021
Single Pole IIR Filter: Substitute for Moving Average Filter posted on August 10, 2022
Comb Filter Introduction and Analysis posted on March 1, 2023
Windowing Functions for Better Spectral Analysis posted on August 1, 2023








![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.