H.F. data transmission using chirp signals

Abstract

Swept-frequency or chirp signals are currently under investigation for data-transmission applications. In particular, long-range air/ground communication in the h.f. band may benefit from the use of these wideband signals owing to the inherent protection chirp signals offer against fading in a time-varying multipath channel. The theory of pulse compression and data transmission using chirp signals is outlined, and an experimental communication system is described with measured error rates in noise and carrier interference.