Ronald Hugh Barker 1915 - 2015
Biographical information on Ronald Hugh Barker (Roy), a pioneer in digital technology and IET Member for 70 years.
Dr Ronald Hugh Barker BSc, PhD, FIET, FInstP, FIMechE, CEng
Early life and education
Ronald Hugh Barker (1915–2015), known throughout his life as Roy, was a British physicist, mathematician and engineer whose research helped shape the emergence of modern digital engineering. Barker is best known for the signal patterns that bear his name, known as Barker codes. They have unique correlation properties which enable digital systems to detect and synchronise weak signals with exceptional reliability, and they continue to be widely used in radar, satellite communications, navigation and medical ultrasound.
Much of the information in this biography has been compiled from Barker's own collection of research papers, now preserved in the IET Archives together with complementary material held by the Malvern Radar and Technology History Society (MRATHS). This has revealed a much broader body of pioneering work spanning digital communications, digital measurement, telemetry and sampled-data control.
Born in Dublin to English parents, Barker's early education was disrupted by his father's frequent moves in search of work as a stained-glass artist. Despite these difficulties, he excelled in mathematics and science, winning the Allen Prize at Cedars School, Leighton Buzzard. He graduated with First Class Honours in Physics from University College Hull in 1938 and was awarded a PhD by the University of London in 1954 for research on pulse-code servo systems.
Wartime research and telemetry
After beginning his career at Standard Telephones and Cables, Barker joined the Signals Experimental Establishment, Woolwich in 1941. Following heavy bombing in in the second world war the establishment relocated to Christchurch, where it became the Signals Research and Development Establishment (SRDE). During the Second World War he led research into frequency-modulated military communications before becoming one of Britain's leading authorities on telemetry. Following the war, he investigated German V2 missile instrumentation and, in 1946, presented papers at the First International Telemetering Conference at Princeton University, helping establish international collaboration in guided-weapons telemetry. His subsequent work on Britain's first telemetry-guided missile programme (LOPGAP) contributed to the development of contributed to the development of Britain's first telemetry-guided missile systems.
Pioneering digital engineering
The IET Archives reveal that Barker's most significant achievements extended far beyond the Barker codes for which he is widely remembered. Between 1946 and the mid-1950s he undertook a sustained programme of research into the measurement, transmission and automatic control of information represented in digital form.
His work included methods of converting physical measurements directly into binary form, transmitting that information digitally, developing one of Britain's earliest optical binary shaft encoders for measuring rotational position, and creating practical mathematical methods for analysing sampled-data control systems using pulse transfer functions. These transform methods enabled engineers to predict and design the behaviour of digital control systems and formed part of the mathematical foundations on which later z-transform techniques were developed.
Looking back on this work in 1962, Barker observed that its common theme was 'handling information represented in a digital form'. Seen today, this remarkable programme of research anticipated many of the technologies that underpin the modern digital world.
Scientific leadership
By the late 1950s Barker had established a reputation for combining advanced mathematics with practical engineering, together with a broad understanding of communications, instrumentation and control systems. These qualities led to increasingly senior leadership appointments in government and industry.
In 1959 he was appointed Deputy Director of the Central Electricity Research Laboratories (CERL), Leatherhead, where he helped direct one of Britain's leading industrial research establishments. He later became Technical Director of R. B. Pullin & Co., an innovative manufacturer of scientific and electrical instruments.
His final appointment was as Deputy Director of the Royal Armament Research and Development Establishment (RARDE), Fort Halstead, where he returned to government service and continued to oversee major scientific and engineering research programmes.
Professional service
Barker's senior appointments enabled him to make an increasing contribution to the engineering profession. A Fellow of the Institution of Electrical Engineers from 1960, he served on numerous committees, including the General Purposes and Finance Committee, the Membership Committee and the Control and Automation Committee, which he chaired in 1971. He also represented the IEE on the Institution of Mechanical Engineers' Automatic Control Group.
Beyond the Institution, Barker served on the Council of the British Scientific Instrument Research Association and was an external examiner for the Universities of London and Manchester. He remained an active member of the Institution for more than seventy years.
Professional recognition
Barker's pioneering research brought increasing recognition from both the engineering profession and fellow researchers. In 1953 he was awarded the Institution of Electrical Engineers Heaviside Premium for his work on pulse transfer functions and sampled-data control systems, recognising the practical importance of his mathematical methods for digital control engineering.
As his research became more widely known, Barker established an international professional reputation in the emerging field of digital control. His work attracted the attention of researchers in Britain, the United States and the Soviet Union, and he corresponded with several pioneers of modern control engineering. During the same period, his work on Barker codes was published, attracting great interest. These remain widely used for signal detection and synchronisation in radar, satellite communications, navigation, medical ultrasound, broadband and other digital systems.
However, much of Barker's wider research remained relatively little known outside specialist circles because it was undertaken for the Ministry of Supply during the early Cold War and documented principally in defence reports, technical memoranda and patent specifications rather than the open scientific literature. Consequently, many of his pioneering contributions to digital measurement, digital communications and sampled-data control did not receive the wider recognition they might otherwise have achieved.
Legacy
Although Barker codes remain his best-known achievement, they represent only one part of a much broader programme of research into the measurement, transmission and control of digital information. Barker was a modest man who rarely spoke about the technical and classified work he undertook. Much of what is now known has been reconstructed from his personal papers preserved in the IET Archives (NAEST 301), together with complementary material held by the Malvern Radar and Technology History Society (MRATHS). These collections enable historians and researchers to reassess the full scope of his work, revealing contributions that extend well beyond the Barker codes for which he is best known. Related government research reports from the Signals Research and Development Establishment are also preserved in The National Archives (AVIA 23).
Source: Ronald Hugh Barker archive papers IET Archives reference NAEST 301.