
Cross Correlation Explained With Real Signals posted on December 1, 2021
Half Band Filter Design: Exceptional Filtering Efficiency! posted on September 27, 2021
DFT Frequency Resolution Explained posted on March 16, 2022
Polyphase Half Band Filter for Decimation by 2 posted on September 29, 2021
The Unit Circle: The Field of Play for the Game of DSP posted on October 23, 2021
Derivative Filter Impulse Response Derivation posted on November 24, 2021
Using Euler’s Formula to Derive Sine and Cosine posted on November 24, 2021
Square Root Raised Cosine Filter in Python posted on November 10, 2021
Power and Energy in Discrete-Time Signals posted on December 1, 2023
Deriving the Ideal Low Pass Filter (LPF) posted on October 1, 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.