Chirp spread spectrum

A linear frequency modulated upchirp in the time domain

In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency). In the picture is an example of an upchirp—as you can see, the frequency increases linearly over time.

单词	Chirp spread spectrum
释义	Chirp spread spectrum 英语百科 Chirp spread spectrum In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency). In the picture is an example of an upchirp—as you can see, the frequency increases linearly over time.
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