Model for Computation of Interference to Radio-Relay Systems From Geostationary Satellites

May, A. S.; Pagones, M. J.

doi:10.1002/j.1538-7305.1971.tb02536.x

Cited by 3 publications

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A model for interference studies relating to multisatellite non‐geostationary systems in the mobile satellite service

Pahl¹,

Parker²,

Singarajah

1994

Int. J. Satell. Commun.

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An option being considered by current and prospective mobile satellite service (MSS) operators is the use of constellations of non‐geostationary orbit (NGSO) satellites to provide global personal communications. The scarcity of free spectrum, together with the bandwidth typically required, means that any new MSS system must consider sharing spectrum with other systems and services. Spectrum sharing must be based on defined interference criteria being satisfied. When multiple NGSO satellites are considered there is no accepted method for assessing interference. This paper describes a model used as the basis for a computer simulation of interference scenarios involving MSS, fixed service (FS) and fixed satellite service (FSS) systems. The simulation includes NGSO dynamics, constellations of MSS satellites with multi‐spot antennas, multiple geostationary FSS satellites and multiple hop FS links. Interference events are based on C/I calculations, and statistics, such as the percentage of time that the C/I falls below a required protection ratio, are calculated. More generally C/I cumulative distribution functions are produced.

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A model for interference studies relating to multisatellite non‐geostationary systems in the mobile satellite service

Pahl¹,

Parker²,

Singarajah

1994

Int. J. Satell. Commun.

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Spatial radiation characteristics of a pyramidal horn- reflector antenna

Butzien¹,

Siller²

1977 Antennas and Propagation Society International Symposium

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Radio System Interference from Geostationary Satellites

Butzien¹

1981

IEEE Trans. Commun.

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Absrmcr-Geostationary communications satellites have a potential for causing interference into terrestrial radio relay systems since present INTELSAT satellites as well as a number of U.S. domestic satellites transmit a downlink frequency in the 4 GHz common carrier band. Use has been made of recently measured spatial antenna radiation patterns of the AT&T KS15676 pyramidal horn-reflector antenna to calculate the interference noise into typical U.S: high density 4 GHz radio relay systems. The model employed uses the maximum allowed CCIR flux from the satellites so that the results are conservative since the flux from deployed satellite repeaters is normally below that level. Although certain cases such as east-west oriented existiug systems with one or more direct exposures may experience noticeable interference, no significant noise problem is foreseen from this source even when the geostationary orbit is populated as heavily as one communications satellite every 3".

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Model for Computation of Interference to Radio-Relay Systems From Geostationary Satellites

Cited by 3 publications

References 1 publication

A model for interference studies relating to multisatellite non‐geostationary systems in the mobile satellite service

A model for interference studies relating to multisatellite non‐geostationary systems in the mobile satellite service

Spatial radiation characteristics of a pyramidal horn- reflector antenna

Radio System Interference from Geostationary Satellites

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