Pulse or digital communications – Repeaters – Testing
Patent
1997-04-16
1999-03-09
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
370335, 370441, 455447, 455524, H04B 1713, H04J 1306, H04Q 722
Patent
active
058810943
ABSTRACT:
A frequency-hopping-communications system, assigned a system bandwidth B, with the system bandwidth B divided into N sets of frequencies, with each set of the N sets of frequencies not having the same frequencies as other sets of the N sets of frequencies, for communicating base-message data to a plurality of remote units. The frequency-hopping-communications system includes a plurality of base stations for communicating base-message data to the plurality of remote units. Each of the base stations has a coverage area divided into a plurality of concentric regions with each concentric region assigned one of the N sets of frequencies. For communicating with a selected-remote unit located within a particular-concentric region, each base station has a frequency-hopping device for frequency hopping the base-message data over a set of frequencies assigned to the particular-concentric region, thereby generating a frequency-hopped signal, a controller, responsive to the selected-remote unit being located in the particular-concentric region, for controlling the set of frequencies use by said frequency-hopping device, and a base antenna coupled to the power amplifier for radiating the frequency-hopped signal. Each of the remote units has a receiver for recovering the base-message data from the frequency-hopped signal.
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Chin Stephen
Gluck Jeffrey W.
InterDigital Technology Corporation
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