Digital audio radio service (DARS) is any type of digital radio program service. In the United States it is the official FCC term for digital radio services.
The most popular type of DARS in the U.S. and Canada is SDARS (Satellite Digital Audio Radio Service), used by Sirius Satellite Radio and XM Satellite Radio. XM and Sirius both operate in the 2.3-GHz S band, from 2320 to 2345 MHz.[1]
Increasing the spectrum available for more services would be difficult, since unlike C-band and Ku band services, which allow over 200 locations for satellites, S-band satellites must be spaced far apart, with current technology. Existing vehicle antennas would not allow reception of two different stations on the same frequency, though new technology, requiring a new kind of receiver, might be possible.[2]
WorldSpace also operated a DARS network outside the United States and Canada with a footprint covering Europe, Asia, the Middle East and Africa. It used the L-band.[3]
In 1992, the World Administrative Radio Conference (WARC) allocated satellite radio services the 2310–2360 MHz band for Broadcasting Satellite Services (audio).[4]
In the United States, from this global allocation, satellite radio (SDARS) services are allocated a subset, the 25MHz from 2320–2345 MHz.[5] This band is further broken down into sub-bands for space-to-ground and terrestrial broadcasts:
Caption text
Lower
Upper Frequency
Usage and original service user
2320 MHz
2324.54 MHz
Satellite (Sirius)
2324.54 MHz
2327.96 MHz
Terrestrial Repeaters (Sirius)
2327.96 MHz
2332.5 MHz
Satellite (Sirius)
2332.5 MHz
2336.225 MHz
Satellite (XM)
2336.225 MHz
2341.285 MHz
Terrestrial Repeaters (XM)
2341.285 MHz
2345 MHz
Satellite (XM)
Digital Satellite Broadcasting Corporationedit
Digital Satellite Broadcasting Corporation was one of four companies bidding for Satellite Digital Audio Radio Service, or SDARS, licenses in the United States. The service would have been a listener-supported subscription digital audio service.
1995 January: The FCC sets aside 50 MHz (2310 MHz through 2360 MHz) in the S-band for Satellite Digital Audio Radio Service, also known as SDARS and now commonly known as Satellite Radio.[6]
1997 April: American Mobile Satellite Corporation and Satellite CD Radio, Inc. are each awarded SDARS licenses. The companies eventually become known XM Satellite Radio and Sirius Satellite Radio, respectively. Primosphere Limited Partnership and Digital Satellite Broadcasting Corporation are denied licenses by becoming third and fourth lowest bidders, respectively, during the auction.
^Erskine, Daniel H. (2007-05-20). "Satellite Digital Audio Radio Searching for Novel Theories of Action". Rochester, NY. SSRN 987358. {{cite journal}}: Cite journal requires |journal= (help)
^Bruce Elbert, "Satellite Radio – Accomplishments, Opportunities and Risks," SatMagazine.com, March 2005, . Archived from the original on 2008-05-09. Retrieved 2008-05-07.
^. 1WorldSpace.com. Archived from the original on 2008-07-19.
^"Establishment of Rules and Policies for the Digital Audio Radio Satellite Service in the 2310-2360 MHz Frequency Band" (PDF).
^"Wireless Communications Service (WCS)". Federal Communications Commission. 16 October 2012.
digital, audio, radio, service, dars, type, digital, radio, program, service, united, states, official, term, digital, radio, services, most, popular, type, dars, canada, sdars, satellite, digital, audio, radio, service, used, sirius, satellite, radio, satelli. Digital audio radio service DARS is any type of digital radio program service In the United States it is the official FCC term for digital radio services The most popular type of DARS in the U S and Canada is SDARS Satellite Digital Audio Radio Service used by Sirius Satellite Radio and XM Satellite Radio XM and Sirius both operate in the 2 3 GHz S band from 2320 to 2345 MHz 1 Increasing the spectrum available for more services would be difficult since unlike C band and Ku band services which allow over 200 locations for satellites S band satellites must be spaced far apart with current technology Existing vehicle antennas would not allow reception of two different stations on the same frequency though new technology requiring a new kind of receiver might be possible 2 WorldSpace also operated a DARS network outside the United States and Canada with a footprint covering Europe Asia the Middle East and Africa It used the L band 3 Contents 1 Spectrum resources 2 Digital Satellite Broadcasting Corporation 3 See also 4 ReferencesSpectrum resources editIn 1992 the World Administrative Radio Conference WARC allocated satellite radio services the 2310 2360 MHz band for Broadcasting Satellite Services audio 4 In the United States from this global allocation satellite radio SDARS services are allocated a subset the 25MHz from 2320 2345 MHz 5 This band is further broken down into sub bands for space to ground and terrestrial broadcasts Caption text Lower Upper Frequency Usage and original service user 2320 MHz 2324 54 MHz Satellite Sirius 2324 54 MHz 2327 96 MHz Terrestrial Repeaters Sirius 2327 96 MHz 2332 5 MHz Satellite Sirius 2332 5 MHz 2336 225 MHz Satellite XM 2336 225 MHz 2341 285 MHz Terrestrial Repeaters XM 2341 285 MHz 2345 MHz Satellite XM Digital Satellite Broadcasting Corporation editDigital Satellite Broadcasting Corporation was one of four companies bidding for Satellite Digital Audio Radio Service or SDARS licenses in the United States The service would have been a listener supported subscription digital audio service 1990 Sirius Satellite Radio known then as Satellite CD Radio Inc proposes the concept of a satellite delivered digital radio service to the Federal Communications Commission 1995 January The FCC sets aside 50 MHz 2310 MHz through 2360 MHz in the S band for Satellite Digital Audio Radio Service also known as SDARS and now commonly known as Satellite Radio 6 1997 April American Mobile Satellite Corporation and Satellite CD Radio Inc are each awarded SDARS licenses The companies eventually become known XM Satellite Radio and Sirius Satellite Radio respectively Primosphere Limited Partnership and Digital Satellite Broadcasting Corporation are denied licenses by becoming third and fourth lowest bidders respectively during the auction 2001 September 25 XM Satellite Radio officially launches 2002 July 1 Sirius Satellite Radio officially launches See also editDigital audio Digital Audio Broadcasting DAB Direct broadcast satellite Satellite radioReferences edit Erskine Daniel H 2007 05 20 Satellite Digital Audio Radio Searching for Novel Theories of Action Rochester NY SSRN 987358 a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help Bruce Elbert Satellite Radio Accomplishments Opportunities and Risks SatMagazine com March 2005 Satellite Radio SDARS Accomplishments Challenges and Risks Bruce Elbert Satellite Expert and Consultant Archived from the original on 2008 05 09 Retrieved 2008 05 07 Worldspace Corporate Information 1WorldSpace com Archived from the original on 2008 07 19 Establishment of Rules and Policies for the Digital Audio Radio Satellite Service in the 2310 2360 MHz Frequency Band PDF Wireless Communications Service WCS Federal Communications Commission 16 October 2012 http dev space com spacenews archive95 sn1995 fff1476 html Archived 2003 06 06 at the Wayback Machine FCC sets aside spectrum for SDARS Retrieved from https en wikipedia org w index php title Digital audio radio service amp oldid 1190657534, wikipedia, wiki, book, books, library,