
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
Phase, Frequency and Negative Frequency in Complex Sinusoids posted on October 19, 2021
How Euler’s Formula Relates Triangles, the Unit Circle and Complex Sinusoids posted on September 16, 2021
Half Band Filter Design: Exceptional Filtering Efficiency! posted on September 27, 2021
Single Pole IIR Filter Frequency Response posted on July 6, 2022
Why are Sinusoids used in DSP and RF? posted on September 18, 2021
Introduction to Interpolation and Upsampling posted on September 1, 2022
What DSP Classes Should I Take? posted on November 1, 2024
How to Count in Binary Numbers posted on August 1, 2024
Folding a Polyphase Half Band Filter: Lemon Squeezer Style posted on October 6, 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.