5.150 The following bands:
are also designated for industrial, scientific and medical (ISM) applications. Radiocommunication services operating within these bands must accept harmful interference which may be caused by these applications. ISM equipment operating in these bands is subject to the provisions of No. 15.13.
5.282 In the bands 435-438 MHz, 1 260-1 270 MHz, 2 400-2 450 MHz, 3 400-3 410 MHz (in Regions 2 and 3 only) and 5 650-5 670 MHz, the amateur-satellite service may operate subject to not causing harmful interference to other services operating in accordance with the Table (see No. 5.43). Administrations authorizing such use shall ensure that any harmful interference caused by emissions from a station in the amateur-satellite service is immediately eliminated in accordance with the provisions of No. 25.11. The use of the bands 1 260-1 270 MHz and 5 650-5 670 MHz by the amateur-satellite service is limited to the Earth-to-space direction.
5.384A The frequency bands 1 710-1 885 MHz, 2 300-2 400 MHz and 2 500-2 690 MHz, or portions thereof, are identified for use by administrations wishing to implement International Mobile Telecommunications (IMT) in accordance with Resolution 223 (Rev.WRC 15)*. This identification does not preclude the use of these frequency bands by any application of the services to which they are allocated and does not establish priority in the Radio Regulations. (WRC 15)
5.393 Additional allocation: in Canada, the United States and India, the frequency band 2 310-2 360 MHz is also allocated to the broadcasting-satellite service (sound) and complementary terrestrial sound broadcasting service on a primary basis. Such use is limited to digital audio broadcasting and is subject to the provisions of Resolution 528 (Rev.WRC 19), with the exception of resolves 3 in regard to the limitation on broadcasting-satellite systems in the upper 25 MHz. Complementary terrestrial sound broadcasting stations shall be subject to bilateral coordination with neighbouring countries prior to their bringing into use. (WRC 19)
5.394 In the United States, the use of the band 2 300-2 390 MHz by the aeronautical mobile service for telemetry has priority over other uses by the mobile services. In Canada, the use of the band 2 360-2 400 MHz by the aeronautical mobile service for telemetry has priority over other uses by the mobile services. (WRC 07)
5.395 In France and Turkey, the use of the band 2 310-2 360 MHz by the aeronautical mobile service for telemetry has priority over other uses by the mobile service. (WRC-03)
G2 In the bands 216.965-216.995 MHz, 420-450 MHz (except as provided for in G129), 890-902 MHz, 928-942 MHz, 1300-1390 MHz, 2310-2390 MHz, 2417-2450 MHz, 2700-2900 MHz, 3300-3500 MHz, 5650-5925 MHz, and 9000-9200 MHz, use of the Federal radiolocation service is restricted to the military services.
US327 The band 2310-2360 MHz is allocated to the broadcasting-satellite service (sound) and complementary terrestrial broadcasting service on a primary basis. Such use is limited to digital audio broadcasting and is subject to the provisions of Resolution 528.

Wiki entries

Amateur Radio (13 cm Band)

Current Use 2300–2450 MHz Amateur radio 13 cm band

The band 2300-2450 MHz is allocated on a secondary basis to amateur radio in all three ITU regions. According to the ITU, this band is used for short-range communications and for experimentation.

By virtue of 5.282, in the band 2400-2450 MHz, the amateur-satellite service may operate subject to not causing harmful interference to other services operating in accordance with the Table.

In the United States, only the sub-bands 2300-2310 and 2390-2450 MHz are allocated to the amateur service. The ARRL has adopted the following band plan:

2300.0-2303.0 High-rate data
2303.0-2303.5 Packet
2303.5-2303.8 TTY packet
2303.9-2303.9 Packet, TTY, CW, EME
2303.9-2304.1 CW, EME
2304.1 Calling frequency
2304.1-2304.2 CW, EME, SSB
2304.2-2304.3 SSB, SSTV, FAX, Packet AM, Amtor
2304.30-2304.32 Propagation beacon network
2304.32-2304.40 General propagation beacons
2304.4-2304.5 SSB, SSTV, ACSSB, FAX, Packet AM, Amtor experimental
2304.5-2304.7 Crossband linear translator input
2304.7-2304.9 Crossband linear translator output
2304.9-2305.0 Experimental beacons
2305.0-2305.2 FM simplex (25 kHz spacing)
2305.20 FM simplex calling frequency
2305.2-2306.0 FM simplex (25 kHz spacing)
2306.0-2309.0 FM Repeaters (25 kHz) input
2309.0-2310.0 Control and auxiliary links
2390.0-2396.0 Fast-scan TV
2396.0-2399.0 High-rate data
2399.0-2399.5 Packet
2399.5-2400.0 Control and auxiliary links
2400.0-2403.0 Satellite
2403.0-2408.0 Satellite high-rate data
2408.0-2410.0 Satellite
2410.0-2413.0 FM repeaters (25 kHz) output
2413.0-2418.0 High-rate data
2418.0-2430.0 Fast-scan TV
2430.0-2433.0 Satellite
2433.0-2438.0 Satellite high-rate data
2438.0-2450.0 WB FM, FSTV, FMTV, SS experimental

Standard LTE Bands

Current Use 2300–2400 MHz LTE band 40 TDD

The following bands have been defined by 3GPP as standard LTE bands for Frequency Division Duplex (FDD, where mobile and base stations transmit in separate bands) and Time Division Duplex (TDD, where mobiles and bases transmit and receive on the same frequency). These bands are defined in 3GPP TS 36.101 (link below).

Note that bands 15 & 16 and 30-32 are not defined, and the FDD band 29 is used for downlink-only for carrier aggregation, so it has no corresponding uplink band.

Uplinks refer to the frequencies used for handsets and other user devices to transmit to the base station, and downlinks refer to frequencies used by base stations to transmit to the user devices.

Satellite Digital Audio Radio Service (SDARS) (Sirius & XM)

Current Use 2320–2324.54 MHz Sirius satellite radio

Sirius and XM, which are now one company, use this band to transmit digital radio from their satellites and also from ground-based transmitters (terrstrial repeaters) that fill in coverage gaps due to building and terrain blockage of the satellite signals.

According to the FCC (FCC 10-82), "The Commission's rules define SDARS - commonly known as "satellite radio" – as "[a] radiocommunication service in which audio programming is digitally transmitted by one or more space stations directly to fixed, mobile, and/or portable stations, and which may involve complementary repeating terrestrial transmitters, telemetry, tracking and control facilities." Thus, SDARS is primarily a satellite-delivered service in which programming is sent directly from satellites to subscriber receivers either at a fixed location or in motion. Because a direct line of sight is generally required in order to receive an acceptable satellite signal, ground-based terrestrial repeaters are used in many areas to re-transmit the same signals provided by satellites directly to subscribers in order to maintain adequate signal power. These areas include "urban canyons" between tall buildings, heavily foliaged areas, tunnels, and other places where obstructions could limit satellite visibility or cause multipath interference from reflected signals.

"Licenses to provide SDARS within the United States were awarded by auction in early April, 1997. The two winners of the auction – XM and Sirius – were each assigned 12.5 megahertz of spectrum for their exclusive use on a primary basis. XM and Sirius launched their satellites and began commercial operations in 2001 and 2002, respectively. As of March 31, 2010, Sirius XM reported it had 18,944,199 subscribers in the conterminous United States.

"On August 5, 2008, the Commission approved the merger of XM and Sirius, which have subsequently combined to form a merged entity called "Sirius XM." In the merger proceeding, the Commission found that significant engineering differences in the XM and Sirius infrastructures make integration of the two systems difficult in the short term. In addition, the Commission noted that XM and Sirius had each invested significantly in their existing infrastructure, with the expectation of operating this infrastructure for years to come. Thus, despite the merger of the two companies, the XM and Sirius satellite and repeater infrastructures will operate as separate, legacy systems, at least in the near term.

"Sirius XM offers hundreds of channels of music, entertainment, news, and sports programming on the Sirius and XM satellite radio networks, as well as weather and data information services for maritime, aeronautical, and other purposes. SDARS radio receivers are used in cars, trucks, boats, aircraft, and homes – and are available for portable use..."

Acccording to SiriusXM, their satellite signals cover the 48 contiguous states, and 200 miles "off shore."

Historical Information on SDARS

The following is historical information on SDARS from Benn Kobb's 2001 book Wireless Spectrum Finder. That book is now (c) SpectrumWiki.com:

*****
The principal worldwide band for audio broadcasting direct to the public from satellites (Broadcasting-Satellite Service (Sound) or BSS) is the so-called L-band, 1452—1492 MHz.

That band falls within aeronautical test telemetry spectrum in the U.S. (see 1435—1525 MHz).

As an alternative, the International Telecommunication Union (ITU) allocated the S-band, 2310—2360 MHz, for domestic satellite audio broadcasting in the U.S. Other nations, especially Canada, criticized this action as detrimental to the realization of a uniform worldwide service in the L-band.

The ITU also allocated 2520—2670 MHz for BSS national and regional systems for community reception. (India and Mexico also are authorized to use the S-band for BSS.)

Against ferocious opposition from conventional broadcasters, the FCC eventually allocated 2320—2345 MHz to satellite Digital Audio Radio Services (SDARS or DARS). “Satellite DARS will provide continuous radio service of compact disc quality for all listeners and will offer an increased choice of over-the-air audio programming,” the FCC said.

No other significant terrestrial U.S. users are in the S-band, but adjacent countries operate terrestrial fixed point-to-point, fixed point-to-multipoint, and aeronautical mobile telemetry systems in the band. Satellite DARS operators must take precautions to avoid interference with the systems of other nations.

Sirius and XM

There are two SDARS licensees : Sirius Satellite Radio (2320—2332.5 MHz), formerly Satellite CD Radio and XM Satellite Radio (2332.5—2345 MHz), formerly American Mobile Radio.

These companies won their licenses by bidding $83 million and $89 million, respectively, at an April 1997 auction. The FCC concluded that only enough spectrum existed in the S-band for two SDARS licensees of 12.5 MHz each. The FCC requires that SDARS receivers be capable of picking up broadcasts from both of the licensees.

The licensees must deploy hundreds of terrestrial repeaters, ground transmitters that relay broadcasts from satellites. Most of the gap-fillers will be in urban areas where obstructions inhibit satellite reception.

Sirius will use three satellites in inclined elliptical orbits will offer a service directed mainly to vehicle radios. Sirius-1 and Sirius-2 had been launched at this writing. The major investors in Sirius include Ford and Loral.

XM will use two geostationary satellites (officially designated “Rock” and “Roll”) that are directed both to vehicle and portable radios. XM’s major investors include GM and its DirecTV business; Clear Channel Communications; and Liberty Media, in addition to its founder, Motient Corp., formerly American Mobile Satellite Corp.

Uplink stations in 7.025—7.075 GHz feed these satellites. They use frequencies in the S-band in 3.7—4.2 GHz, and 5.925—6.425 GHz for telemetry and control, operation during transfer to final orbit, and for contingency purposes.

Other SDARS-Related Issues

Sirius and XM might have faced competition from SDARS service in the Wireless Communications Service (WCS) band. A group of WCS licensees applied for permission to use their licenses to provide SDARS (see 2305—2310 MHz). They later abandoned the idea.

The FCC licensed, originally on an experimental basis only, the WorldSpace SDARS system to broadcast in the L-band (see 1435—1525 MHz). It later granted full authorization to the Washington, D.C.-based WorldSpace, but does not permit the company to serve U.S. audiences.

NASA’s Goldstone Solar System Radar operates at 2320 MHz and 8.56 GHz in the Mojave Desert northeast of Los Angeles. Scientists used it to observe Comet Hyakutake when it passed within 9.3 million miles of Earth in 1996.

SDARS interference is expected to make radar astronomy operations at 2320 MHz “nearly impossible,” according to NASA’s Jet Propulsion Laboratory.

The 2310—2390 MHz spectrum is one of many restricted bands in which the FCC Part 15 rules permit unlicensed devices to emit only very low level emissions.

***** (End of historical information from Wireless Spectrum Finder)