EDN

Frequency domain tutorial, part 1: Dealing with ambiguity

This series is drawn from the course “DSP Made Simple for Engineers.” For more information, see Besser Associates. This article is also available as a PDF Part 2 introduces quadrature (complex) ...
EDN

Frequency domain tutorial, part 2: complex signals and spectral diagrams

Figure 4. A snapshot, in time, of two complex numbers whose exponents, and thus their phase angles, change with time. The notion of negative frequency is often troubling to engineers who've spent so ...
Electronic Design

Understand Signal Analysis In The Time, Frequency, And Modulation Domains

Modern oscilloscopes capture, view, measure, and analyze complex RF signals in the time, frequency, and modulation domains. Time-domain analysis, the original oscilloscope function, allows users to ...