![Figure 1: The weights of the partitioned half band filter hA[n] and hB[n].](https://www.wavewalkerdsp.com/wp-content/uploads/wordpress-popular-posts/2226-featured-125x75.png)
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March 1, 2025
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How Euler’s Formula Relates Triangles, the Unit Circle and Complex Sinusoids - Single Pole IIR Filter Frequency Response
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- Introduction to Interpolation and Upsampling
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- FIR Low Pass Filter Design with Remez
- Designing an FIR High Pass Filter with Remez
- Basic Rules for Complex Numbers
- Polyphase Half Band Filter for Decimation by 2
- Half Band Filter Design: Exceptional Filtering Efficiency!
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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.
