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Ronald Hugh Barker whilst less publicly known than contemporaries such as Alan Turin (theoretical computing), Tommy Flowers (Colossus) or Alec Reeves (pulse-code modulation) he played a key pioneering role in the early development of British digital communications. Working at the Signals Research and Development Establishment (SRDE), he was instrumental in the practical applications of pulse-code modulation, particularly in telemetry for guided weapons and early digital radar but most notably for the invention of the [[Barker code]] in 1953. Barker code remains in use for synchronisation in radar, telemetry systems and digital communication processing in many applications.<ref name="IETbio">{{cite web |title=Ronald Hugh Barker (1915–2015) |url=https://www.theiet.org/membership/library-and-archives/the-iet-archives/biographies/ronald-hugh-barker-1915-2015/ |website=The IET |access-date=2025-04-21}}</ref> His work also included early applications of [[pulse-code modulation]]
modern air traffic control systems, speech encryption and rotary encoders.<ref name="IETblog">{{cite web |last=IET Archives |title=The Story of Roy Barker: A Physicist with 70 Years of Membership |url=https://ietarchivesblog.org/2024/05/08/the-story-of-roy-barker-a-physicist-with-70-years-of-membership-at-the-iet/ |website=IET Archives Blog |date=2024-05-08 |access-date=2025-04-21}}</ref> | |||