
Deriving the Ideal Low Pass Filter (LPF) posted on October 1, 2022
Cross Correlation: Explaining Time Lags posted on January 12, 2022
Barker Code Auto-Correlation Properties posted on March 1, 2024
Using Euler’s Formula to Derive Sine and Cosine posted on November 24, 2021
Cross Correlation Explained With Real Signals posted on December 1, 2021
Complex Frequency Shifting in Discrete Time posted on January 1, 2023
Half Band Filter Design Function in Python posted on December 8, 2021
Windowing Function Gain Normalization posted on January 1, 2025
Richard Hamming, Acorns and the Engineering Mindset posted on August 31, 2021
How Euler’s Formula Relates Triangles, the Unit Circle and Complex Sinusoids posted on September 16, 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.