Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1994-10-26
1996-12-31
Faile, Andrew
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
370280, 379 61, 375202, 455 88, H04Q 720
Patent
active
055904106
ABSTRACT:
A communications system includes at least two communications units, each communication unit including a transmitter capable of transmitting to the other unit on one or more frequencies, under the control of a mode control unit and wherein acquisition or a locking of frequencies of the two communications units and timing signal recovery is achieved by transmitting signals on a group of predetermined frequencies, the transmission on each frequency being for a predetermined time frame in a sequence which is repeated after n+1 time frames, wherein n is the number of different frequencies to be transmitted by the originating communications unit, and the receiving unit including a receiver operating on one of the predetermined frequencies for n+1 time frames until the receiving unit receives a signal from the originating unit and transmits an acknowledgment signal to the originating unit thus locking the two units on one of the predetermined frequencies such that information, transmission and reception can proceed either in single frequency or in frequency hopping mode.
REFERENCES:
patent: 5278992 (1994-01-01), Su et al.
patent: 5323447 (1994-06-01), Gillis et al.
"Sproad Spectrum Goes Commercial", Schilling et al; IEEE Spectrum, Aug. 1990; pp. 40-41 and 44-45.
"Principles of Communication Systems", Schilling et al, pp. 729-732 1986.
Deutsch Brian M.
Foster, Jr. Robert B.
American Wireless Corporation
Faile Andrew
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