H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/30
H04B 7/24 (2006.01) H04M 1/725 (2006.01)
Patent
CA 2021847
ABSTRACT OF THE DISCLOSURE A radiotelephone system having a base unit and a plurality of subordinate units for carrying out radiocommunication between them. The base unit has one or more sending sections and one or more receiving sections, and each of the subordinate units has a sending part and a receiving part. The system includes a first frequency varying part for shifting periodically sending carrier frequencies of the sending section as well as receiving carrier frequencies of the receiving section to make one sending or receiving carrier frequency at a phase different from that at another preceding phase, a first synchronizing signal part for generating a synchronizing signal in step with a time period determined from said shifting of those carrier frequencies of the base unit due to the first frequency varying part, a second synchronizing signal part for extracting a synchronizing signal from a receiving carrier signal of each receiving part of the subordinate units, and a second frequency varying part for shifting receiving and sending carrier frequencies of each subordinate unit to make one sending or receiving carrier frequency at a phase different from that at another preceding phase in step with a time period determined by the synchronizing signal.
Kawaguchi Youichi
Kikuchi Hajime
Nishi Kazuhiko
Ascii Corporation
Marks & Clerk
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