Cell enhancer for cellular radio telephone system having bandpas

Details Cell enhancer for cellular radio telephone system having bandpas Cell enhancer for cellular radio telephone system having bandpas

1985-12-16

1988-06-28

Griffin, Robert L.

Telecommunications

Carrier wave repeater or relay system

Plural modulated carriers

455 16, 455 33, H04B 714, H04Q 700

Patent

active

047544953

ABSTRACT:
A cell enhancer for use by one cellular provider in a cellular radio-telephone system includes a wideband amplifier for amplifying both down-link and up-link signals and a filter system for ensuring that signals outside of the cellular bands are not amplified. The filter system includes a wideband filter that passes at least the voice channels assigned to the cellular provider in the cell and a narrow band filter that passes the paging/access control channel in the cell. By using the filter system, signals outside the band assigned to the cellular provider, and particularly signals in the band assigned to the other cellular provider which may be present in the area, will not be amplified by the cell enhancer.

REFERENCES:
patent: 3028489 (1962-04-01), Chasek
patent: 3411088 (1968-11-01), Hutchison
patent: 3450841 (1969-06-01), Zeiser et al.
patent: 4041389 (1977-08-01), Oades
patent: 4198600 (1980-04-01), Oguchi et al.
patent: 4317216 (1982-02-01), Kaegebein
patent: 4475243 (1984-10-01), Batlivala
"The Cell Enhancer", Quinn, 1982, IEEE, pp. 77-79.
Anon, "2 GHz Repeater Built Without I-F", Jun. 1976, p. 16.
Oades, "The Linear RF Repeater", Jun. 1980, pp. 6.2.1-6.2.5.

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