Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-06-24
1999-05-25
Le, Thanh Cong
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
4552772, H04B 116
Patent
active
059078162
ABSTRACT:
In a cellular type communication system a sector antenna 12 provides coverage of a sector with a relatively low receive gain. A multi-beam antenna 20 covers the same sector with a plurality of narrower beams 21', 22', 23' and 24' providing higher gain. A multi-beam antenna system 10 provides higher gain operation by selecting the one of the narrower beams 21', 22', 23' or 24' currently providing best reception of a signal transmitted by a user and coupling that selected beam to a system receiver 18. Beam selection is accomplished by sequentially coupling each narrow beam to a microprocessor based control unit 40 and storing samples of user signals as received in each narrow beam on a continuing repetitive basis. The stored samples are then analyzed in order to select the beam currently providing best reception.
REFERENCES:
patent: 5603107 (1997-02-01), Gottfried et al.
patent: 5634206 (1997-05-01), Reed et al.
patent: 5684491 (1997-11-01), Newman et al.
Lopez Alfred R.
Newman Edward M.
Pedersen John F.
Schay Gary A.
Cong Le Thanh
Marconi Aerospace Systems Inc. Advanced Systems Division
Onders Edward A.
Robinson Kenneth P.
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