![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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Half Band Filter Design: Exceptional Filtering Efficiency! - Cross Correlation Explained With Real Signals
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The third edition of DSP for Beginners: Simple Explanations for Complex Numbers! Includes a new chapter on sampling.
