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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]] anticipated features of
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>
History of RADAR
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1948 A tracking Display and Data Transmission SRDE Tech Memo RES 113
1949 Appendix II to Conversion of Shaft Position to Binary Pulse Code.pdf IETR Ref
1948 Improvements in or relating to Apparatus for data in Binary Digital Form
PCM
His work on electrical pulse-code modulation systems
1952 Group Synchronising of Binary Digital Systems
1948 Improvements in or relating to Apparatus for data in Binary Digital Form <ref>{{cite patent|country=US|number=US2730676A|title=Improvements in or relating to apparatus for the representation of data in a binary digital form |url=https://worldwide.espacenet.com/patent/search/family/010175782/publication/GB650913A?q=pn%3DGB650913A |publisher=European Patents Office |access-date=January 24, 2024 |ref=GB650913A |date=1951}}</ref>
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