![Figure 1: The two sequences for the autocorrelation of x0[n] and x0[n].](https://www.wavewalkerdsp.com/wp-content/uploads/wordpress-popular-posts/5515-featured-125x75.png)
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March 1, 2025
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Half Band Filter Design: Exceptional Filtering Efficiency! - Introduction to Interpolation and Upsampling
- Windowing Function Gain Normalization
- Fourier Transform Explanation as a Cross-Correlation
- Using Euler’s Formula to Derive Sine and Cosine
- Deriving the Ideal Low Pass Filter (LPF)
- Product to Sum Trigonometric Identities with Euler’s Formula
- Bartlett Method Power Spectral Density (PSD) Signal Estimates
- Basic Rules for Complex Numbers
- Cross Correlation Explained With Real Signals
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![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)
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The third edition of DSP for Beginners: Simple Explanations for Complex Numbers! Includes a new chapter on sampling.
