John Renshaw Carson
John Renshaw Carson (born June 28, 1886 in Pittsburgh , Pennsylvania, † October 31, 1940 in New Hope (Pennsylvania) ) was an American communications engineer. He invented single sideband modulation (SSB).
At Princeton University he received his Bachelor of Science in 1907, in 1909 in electrical engineering and in 1912 his master's. In 1907/08 he was at MIT . From 1912 to 1914 he was a lecturer in physics and electrical engineering at Princeton.
In 1914 he started at American Telephone & Telegraph (now AT&T ), where he took part in experiments on radiotelephone . In 1915 he invented single sideband modulation to transmit multiple telephone calls over one circuit at the same time, and installed the first transmission systems between Pittsburgh and Baltimore .
In 1922 he published a mathematical treatise on frequency modulation , in which he presented the Carson formula for bandwidth . Edwin Howard Armstrong was later able to demonstrate the advantages of frequency modulation.
From 1917 to 1925 he analyzed filter effects for amplitude modulation using operator calculus in order to give developers the opportunity to prevent crosstalk on such multipath lines.
From 1925 to 1940 he worked as a mathematician and electrical engineer for Bell Laboratories , where he carried out waveguide experiments with George C. Southworth in 1932 .
Publications
- Electrical Circuit Theory and Operational Calculus ; 1926
See also
Web links
| personal data | |
|---|---|
| SURNAME | Carson, John Renshaw |
| BRIEF DESCRIPTION | American communications engineer |
| DATE OF BIRTH | June 28, 1886 |
| PLACE OF BIRTH | Pittsburgh |
| DATE OF DEATH | October 31, 1940 |
| Place of death | New Hope, Pennsylvania |