Base station transmitter/receiver capable of varying composite d

Details Base station transmitter/receiver capable of varying composite d Base station transmitter/receiver capable of varying composite d

1994-11-08

1998-04-28

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 63, 455138, H04Q 730

Patent

active

057458588

ABSTRACT:
In a base station transmitter/receiver of a cellular system, a plurality of antennas are oriented in each sector and radiate radio transmission signals and receive radio reception signals to produce received signals. A signal processing circuit is connected to the antennas to process the received signals into output reception signal and to process input transmission signal into the radio transmission signals in response to the received signal. Thus, the signal processing circuit serves to vary the directivities of the antennas in each sector and to thereby control a composite directivity formed by the varied directivities.

REFERENCES:
patent: 4128740 (1978-12-01), Graziano
patent: 4932049 (1990-06-01), Lee
patent: 5193109 (1993-03-01), Lee
patent: 5274844 (1993-12-01), Harrison et al.
patent: 5437055 (1995-07-01), Wheatly, III
patent: 5485631 (1996-01-01), Bruckert
patent: 5615409 (1997-03-01), Forssen et al.
Digital Mobile Communication; (Edited by Kuwahara, Science Newspaper Company in Japan, 1992, Sep.).

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