Joachim Hagenauer

Joachim Hagenauer (29 July 1941 – 16 January 2026) was a German information theorist and academic who was professor emeritus at Technical University of Munich. He pioneered the use of soft bits (see Soft output Viterbi algorithm), a coding theory technique that contributes to the high performance of the turbo codes.

Hagenauer's work enabled the advancement of turbo coding and led to a significant improvement in channel coding for digital communications and storage. His works have been applied to digital receiver designs, satellite transmissions and other facets of telecommunications.

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