Patent ID: 6483456
Filing Date: 2002-11-19
Classification: G01S,H04H

Abstract:
A receiver for receiving and processing positioning signals comprising means for receiving and processing audio signals, wherein said receiver further comprises:a series arrangement of a receiver front-end, a mixer stage, filtering means, and analog-to-digital converter means; a digital audio signal path and a digital positioning signal path; means for coupling an output from said series arrangement to said digital audio and digital positioning signal paths; and audio signal eliminating means for selectively eliminating audio signals from said digital positioning signal path, wherein the receiver is a Global Positioning System (GPS) receiver, and wherein the audio signals are Digital Audio Broadcast (DAB) signals, characterized in that said receiver further comprises a voltage-controlled oscillator for supplying a tuneable local oscillator signal to the mixer stage, said audio signal eliminating means comprising control means coupled to a DAB demodulator included in said digital audio signal path and providing a control signal to the voltage-controlled oscillator as well as to a switching device, said switching device being coupled between the analog-to-digital converter means and said digital audio and digital positioning signal paths, said control means tuning the receiver to receive GPS signals and, simultaneously, controlling the switching device to disconnect the filtering means from the GPS signal path and to connect the filtering means to the DAB signal path at the occurrence of non-zero level DAB data segments.