Home > Articles > Engineering > Communications Engineering

Notes on Digital Signal Processing: Overview of Sampling Techniques

This note discusses the difference between implicit and explicit sampling. It introduces three different mathematical models of explicit sampling techniquesβ€”ideal sampling, natural sampling, and instantaneous sampling.
This chapter is from the book 

Digitization of an analog signal is the one process above all others that makes DSP such a useful technology. If it were limited to working with only those signals that orginate in digital form, DSP would be just an academic curiosity. Digitization actually comprises two distinct operations: sampling and quantization, which are usually analyzed separately.

2.1 Implicit Sampling Techniques

In implicit sampling, a sample measurement is triggered by the signal attaining some specified value or crossing some specified threshold. Recording the times at which zero-crossings occur in a bipolar signal is an example of implict sampling.

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.