Universal wireless radiotelephone system

Details Universal wireless radiotelephone system Universal wireless radiotelephone system

1994-10-25

1996-11-12

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

455 332, H04Q 722

Patent

active

055747752

ABSTRACT:
A universal wireless radiotelephone communication apparatus is operative in both a first radiotelephone communication system including a first base station having a wide area of coverage, transmitting radiotelephone signals at a first band of frequencies and in a second radiotelephone communication system including a second base station having a localized area of coverage, transmitting radiotelephone signals at a second band of frequencies higher than said first band of frequencies. The second band of frequencies is optimally selected with an offset of less than twice a frequency contained within said first band. The wireless radiotelephone communication apparatus has a common baseband circuitry for operating with both the first base station covering the wide area and with the second base station covering the local area, the common baseband circuitry processing received radiotelephone signals from both base stations and processes signals generated by a user of the handset for transmission to either of these base stations.

REFERENCES:
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5260988 (1993-11-01), Schellinger et al.

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