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Many DSP systems use composite signals consisting of a sum of sinusoids of the same frequency, often a sine and cosine. In this tutorial, Richard G. Lyons, author of the best-selling DSP book Understanding Digital Signal Processing, thoroughly covers this … Continued

From: R. G. Lyons, UNDERSTANDING DIGITAL SIGNAL PROCESSING, (Appendix F – pages 494-505.) © 1997 by Addison Wesley Longman Inc., Reproduced by permission of Addison Wesley Longman. All rights reserved. The first step in becoming familiar with digital filters is … Continued

One of the things that makes DSP so interesting is its wide variety of tricks, usually to reduce the processing required for a given operation. The right DSP trick can be a nugget of gold. Here, we provide a gold … Continued

Digital Signal Processing is a difficult and complex subject. Here, we offer tutorials to clear up some of the mysteries of DSP. Quadrature Signals: Complex, But Not Complicated Convolution: A Visual Digital Signal Processing Tutorial Cascaded Integrator-Comb (CIC) Filter Introduction … Continued

3.1 Basics 3.1.1 What are “upsampling” and “interpolation”? “Upsampling” is the process of inserting zero-valued samples between original samples to increase the sampling rate. (This is called “zero-stuffing”.) Upsampling adds to the original signal undesired spectral images which are centered … Continued

2.1 Basics 2.1.1 What are “decimation” and “downsampling”? Loosely speaking, “decimation” is the process of reducing the sampling rate. In practice, this usually implies lowpass-filtering a signal, then throwing away some of its samples. “Downsampling” is a more specific term … Continued