Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1992-11-23
1995-07-04
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
4552772, 455135, 375224, H04B 710, H04L 102
Patent
active
054307694
ABSTRACT:
The present invention comprises a method and apparatus for selecting one of at least two antennas (202, 204) in a communication unit (200) for use in a wireless communication system (100). A signal is received by a radio frequency receiver during a receiving period from one of the at least two antennas (202,204) currently selected by an antenna switch (206), the signal having a plurality of bits. The receiver is capable of determining the quality of the receive signal by determining if the incoming bits transition periods fall within a predetermined time window. If it is determined by the receiver that the quality of the receive signal is below a predetermined threshold the currently selected antenna (202 or 204) is switched. The currently selected antenna remains selected when the currently selected antenna has been selected within a predetermined amount of time.
REFERENCES:
patent: 4174502 (1979-11-01), Wilson et al.
patent: 4584709 (1986-04-01), Kneisel et al.
patent: 4584713 (1986-04-01), Bruckert et al.
patent: 4710957 (1987-12-01), Bocci et al.
patent: 5127025 (1992-06-01), Okanoue
Marko Paul D.
Patsiokas Stelios J.
Wadin Craig P.
Chin Stephen
Hernandez Pedro P.
Le Amanda T.
Motorola Inc.
Nichols Daniel K.
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