Methods and apparatus for frequency hopping analog cordless...

Details Methods and apparatus for frequency hopping analog cordless... Methods and apparatus for frequency hopping analog cordless...

2005-07-05

2005-07-05

Gebesse, Tilahun (Department: 2684)

Telecommunications

Radiotelephone system

Including private cordless extension system

C455S426100, C375S133000

Reexamination Certificate

active

06915137

ABSTRACT:
A cordless telephone system comprising a handset and a base station. Each of the handset and the base station contains a transmitter and a receiver, preferably operating on different frequencies. At least one of the handset and the base station controls frequency hopping based on a signal received from the other of the handset and the base station. In a preferred embodiment, The handset transmitter transmits to the base station a combined signal including a digital portion and an analog portion. The base station separates the combined signal to recover the digital portion and the analog portion and employs the analog portion to convey communicated information and the digital portion to control frequency hopping in the transmitter of the base station. The handset transmitter provides a local oscillator signal to the handset receiver to enable frequency conversion in the handset receiver. The base station transmits to the handset a similar combined signal which is similarly separated and employed by the handset.

REFERENCES:
patent: 5307370 (1994-04-01), Eness
patent: 5353341 (1994-10-01), Gillis et al.
patent: 6091758 (2000-07-01), Ciccone et al.
patent: 6128504 (2000-10-01), Ciccone
patent: 6278722 (2001-08-01), Evans

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