Gottfried Ungerboeck (born 15 March 1940, Vienna) is an Austrian communications engineer.
At Zurich, he worked on digital signal processing and switching systems, communication and information theory.
Among many contributions to the theory of data transmission, he invented trellis coded modulation.
Ungerboeck joined Broadcom in 1998, as Technical Director for Communication business line.
He has won the 2018 Shannon Award of the IEEE Information Theory Society.