GPS receiver

• US 20020003494A1
• Filed: 05/15/2001
• Published: 01/10/2002
• Est. Priority Date: 05/22/2000
• Status: Active Grant

• Current Assignee: Uniloc 2017 LLC (SoftBank Group Corp.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Huisken, Josephus Antonius
• Granted Patent: US 6,483,456 B2
• Time in Patent Office: Days
• US Class Current: 342/357.12
• CPC Class Codes: G01S 19/36 relating to the receiver frond end
• CPC Class Codes: H04H 2201/20 digital audio broadcasting [DAB]
• CPC Class Codes: H04H 40/18 Arrangements characterised by circuits or components specially adapted for receiving

Abstract

Global Position System (GPS) receiver for receiving and processing GPS signals comprising means for receiving and processing Digital Audio Broadcast (DAB) signals. To realize simultaneous processing of both DAB and GPS signals the receiver is provided with a receiver front end, a mixer stage, filtering means and analog to digital converter means being coupled to digital DAB and GPS signal paths, including DAB signal eliminating means for selectively eliminating DAB signals from said digital GPS signal path.

Claims

1. Receiver for receiving and processing positioning signals comprising means for receiving and processing audio signals, characterized by a receiver front end, a mixer stage, filtering means and analog to digital converter means being coupled to audio and positioning signal paths, including audio signal eliminating means for selectively eliminating audio signals from said digital position signal path.

2. Receiver according to claim 1, characterized in that the receiver is a Global Positioning System (GPS) receiver.

3. Receiver according to claim 2, characterized in that the audio signals are Digital Audio Broadcast (DAB) signals.

4. Receiver according to claim 3, characterized by a voltage controlled oscillator supplying a tuneable local oscillator signal to the mixer stage, said DAB signal eliminating means comprising control means coupled to a DAB demodulator included in said DAB 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 analogue to digital converter means on the one hand and said digital DAB and GPS signal paths on the other hand, said control means tuning the receiver to receive GPS signals and simultaneously controlling the switch 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.

5. Receiver according to claim 3, characterized by the receiver front end comprising mutually separated DAB and GPS receiver front ends, respectively coupled to a DAB and GPS mixer stage, outputs of these DAB and GPS mixer stages being coupled through respectively a DAB and GPS filtering device to an adder an output thereof being coupled to said DAB and GPS signal paths, said DAB and GPS mixer stages providing a frequency conversion of the DAB and GPS signals into mutually different frequency ranges.

6. Receiver according to claim 5, characterized by DAB channel selection means for selecting a DAB channel having a frequency range located beyond the frequency range of the GPS signals said DAB channel selection means being controlled by a DAB channel selection control device.

7. Receiver according to claim 3, characterized by signal replica means for regenerating received DAB signals from a decoded DAB signal, said DAB signal eliminating means comprising compensation means for subtracting the regenerated DAB signal from the GPS signals in the GPS signal path.

8. Receiver according to one of claims 3 to 7, characterized by various GPS correlators being included in the GPS signal path, each comprising an integrate and dump circuit for DAB signal content controlled time multiplexed correlation of the GPS signals.