Editing Single-sideband modulation (section)

==History==
The first U.S. patent application for SSB modulation was filed on December 1, 1915, by [[John Renshaw Carson]].<ref>{{Patent|US|1449382|John Carson/AT&T: "Method and Means for Signaling with High Frequency Waves" filed on December 1, 1915; granted on March 27, 1923}}</ref> The U.S. Navy experimented with SSB over its radio circuits before [[World War I]].<ref>[http://dj4br.home.t-link.de/ssb1e.htm The History of Single Sideband Modulation] {{webarchive|url=https://web.archive.org/web/20040103032350/http://dj4br.home.t-link.de/ssb1e.htm |date=2004-01-03 }}, ''Ing. Peter Weber''</ref><ref>[https://ieeexplore.ieee.org/document/4051940/;jsessionid=61752BAF0A216895EE329FDD9513CDAD?arnumber=4051940 IEEE, Early History of Single-Sideband Transmission], ''Oswald, A.A.''</ref> SSB first entered commercial service on January 7, 1927, on the [[longwave]] transatlantic public radiotelephone circuit between New York and London.  The high power SSB transmitters were located at [[Rocky Point, New York]], and [[Rugby transmitting station|Rugby, England]].  The receivers were in very quiet locations in [[Houlton, Maine]], and [[Cupar]], Scotland.<ref>[http://massis.lcs.mit.edu/archives/history/underseas.cables History Of Undersea Cables], (1927)</ref>

SSB was also used over [[long-distance calling|long-distance]] [[telephone line]]s, as part of a technique known as [[frequency-division multiplexing]] (FDM). FDM was pioneered by telephone companies in the 1930s. With this technology, many simultaneous voice channels could be transmitted on a single physical circuit, for example in [[L-carrier]].  With SSB, channels could be spaced (usually) only 4,000&nbsp;[[Hertz|Hz]] apart, while offering a speech bandwidth of nominally 300&nbsp;Hz to 3,400&nbsp;Hz.

[[Amateur radio operator]]s began serious experimentation with SSB after [[World War II]].<ref>{{Cite web |title=The Evolution of Single Side Band (SSB) in Amateur Radio |url=https://www.hamradiostore.co.uk/blog/the-evolution-of-single-side-band-ssb-in-amateur-radio#:~:text=Transition%20to%20SSB%20Transmitters,AM%20until%20the%20late%201950s. |access-date=2024-11-23 |website=Waters & Stanton |language=en-gb}}</ref> The [[Strategic Air Command]] established SSB as the radio standard for its aircraft in 1957.<ref>
{{cite web
 |url=http://www.arrl.org/files/file/Technology/pdf/McElroy.pdf
 |title=Amateur Radio and the Rise of SSB
 |publisher=National Association for Amateur Radio
}}</ref> It has become a de facto standard for long-distance voice radio transmissions since then.