Alec Harley Reeves ( born March 10, 1902 in Redhill, England; † October 13, 1971 ) was a British engineering scientists. He conceived and formulated in 1937, the principles of pulse - code modulation (PCM ) and reported in more than 80 additional patents.
Reeves studied engineering at Imperial College London. His first job he took in 1923 at the Western Electric, a leading manufacturer of communications electronics. After the takeover of his employer by the International Telephone and Telegraph Corporation ( ITT) Reeves moved in 1925 in the laboratory to Paris, the LMT, where he worked with engineers known as Maurice Deloraine and Henri Busignies.
During World War II he worked at the Telecommunications Research Establishment ( TRE) at Malvern under Robert Watson-Watt in the development of the radar. Here he was instrumental in the development of the Oboe said radionavigation system of the British bombers.
He also devoted himself to the improvement of communication systems. His prolific work style resulted inter alia in the following inventions:
- Terms of Einseitenbandübertragung in the short wave
- Multiplex telephony using Pulse Amplitude Modulation
- Superheterodyne receiver for microwave
- A multi- carrier system for UHF radio telephone connections.
Reeves was an exceptional and very versatile man interested. Given his fascination with the operation and capabilities of the human brain, he dealt among other things with intense psychokinesis and telepathy.