Patent ID: 6519467
Filing Date: 2003-02-11
Classification: H04B,H04M

Abstract:
A handset for use in a cordless telephone system comprising:a first receiver; a first transmitter operative to produce a first modulated carrier signal containing analog communication information and first frequency hopping information controlling frequency hopping in a second receiver and a second transmitter of a base station, the first frequency hopping information including information directing the timing of frequency hopping and the frequencies to be used; and a first signal combiner operative to receive a first analog signal and a first control data signal to form a first modulation input signal for use by the first transmitter in producing the first modulated carrier signal, the first analog signal containing the analog communication information and the first control data signal containing the first frequency hopping information. wherein the first control data signal is a digital signal; wherein the first receiver and the first transmitter are operative to perform frequency hopping based on second frequency hopping information contained in a second modulated carrier signal received from the base station wherein the first receiver includes a demodulator to demodulate the second modulated carrier signal received from the base station to produce a first demodulated signal and wherein the handset further includes a signal separator to receive the first demodulated signal and produce a first analog output signal and pass the first analog output signal to a loudspeaker to produce user output, the signal separator being further operative to produce a first digital output signal and pass the first digital output signal to a first control unit, the first control unit being operative to produce a first hopping control signal based on the first digital output signal, and wherein the first transmitter is operative to receive the first hopping control signal as a first hopping control input and change frequencies based on the first hopping control input.