Receiver device and method using GPS baseband correlator circuitry for despreading both GPS and local wireless baseband signals
First Claim
1. A receiver device comprising:
- a radio frequency (RF) front-end circuit for producing a GPS baseband signal from a received wireless analog GPS signal and for producing a local wireless (LW) baseband signal from a received wireless analog LW signal; and
a common baseband circuit coupled to said radio frequency front-end circuit to receive both said GPS and said LW baseband signals and for recovering therefrom GPS and LW digital data.
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Accused Products
Abstract
A method and system using correlator circuitry in a GPS baseband circuit for despreading both GPS data and local wireless data. In one embodiment, an RF signal (local wireless) is received at a first frequency and a digital baseband signal is produced therefrom at a second frequency. A GPS signal is also received at the second frequency and a digital baseband signal is produced therefrom. Both baseband signals are provided to a single GPS baseband circuit for data recovery. In a GPS mode, GPS data is recovered from the baseband signal by despreading and demodulation. In a local wireless mode, the GPS baseband circuit is programmed to despread and recover local wireless data. The GPS data and the local wireless data can be stored in a data buffer for downstream processing. By sharing the correlator circuits in the GPS baseband circuit for both GPS data recovery and local wireless data recovery, a low cost receiver unit is provided. In one embodiment, the local wireless baseband signal is produced by up conversion of the local wireless RF signal and then processing though a common RF front-end circuit that is also used by the received GPS signal.
26 Citations
47 Claims
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1. A receiver device comprising:
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a radio frequency (RF) front-end circuit for producing a GPS baseband signal from a received wireless analog GPS signal and for producing a local wireless (LW) baseband signal from a received wireless analog LW signal; and
a common baseband circuit coupled to said radio frequency front-end circuit to receive both said GPS and said LW baseband signals and for recovering therefrom GPS and LW digital data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A receiver device comprising:
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a first receiver circuit for coupling with an antenna and for receiving and reproducing an analog global positioning system (GPS) signal therefrom having a first frequency;
a radio frequency (RF) front-end circuit for receiving said analog GPS signal and for producing a GPS baseband signal therefrom;
a frequency converter circuit for converting a first analog LW signal having a second frequency to a second analog LW signal having said first frequency, wherein said RF front-end circuit also receives said second analog LW signal and produces an LW baseband signal therefrom; and
a baseband circuit for receiving both said GPS and said LW baseband signals and recovering therefrom GPS and LW data. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of receiving wireless data signals comprising:
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receiving an analog global positioning system (GPS) signal from an antenna, said analog GPS signal having a first frequency;
producing a GPS baseband signal from said analog GPS signal;
receiving a first analog local wireless (LW) signal from an antenna, said first analog LW signal having a second frequency;
converting said first analog LW signal to a second analog LW signal having said first frequency;
producing an LW baseband signal from said second analog LW signal; and
supplying both said GPS and said LW baseband signals to a common baseband circuit and recovering them from GPS and LW data using said common baseband circuit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A receiver device comprising:
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a first radio frequency (RF) front-end circuit for producing a GPS baseband signal from a received wireless analog GPS signal;
a second RF front-end circuit for producing a local wireless (LW) baseband signal from a received wireless analog LW signal; and
a common baseband circuit for receiving both said GPS and said LW baseband signals and for recovering therefrom GPS and LW digital data. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A method of receiving wireless data signals comprising:
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producing a GPS baseband signal from a received wireless analog GPS signal;
producing a local wireless (LW) baseband signal from a received wireless analog LW signal;
supplying said GPS baseband signal and said LW baseband signal to a common baseband circuit; and
recovering GPS and LW digital data by using said common baseband circuit to perform despreading of both said GPS and said LW baseband signals. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44)
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45. A method of recovering data comprising:
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reproducing a local wireless analog signal carrying local wireless digital data encoded therein, said local wireless digital data being encoded using a substantially GPS data encoding format;
generating a first baseband signal based on said local wireless analog signal; and
recovering said local wireless digital data from said first baseband signal by despreading said first baseband signal using data recovery procedures that are substantially compliant with GPS data recovery procedures. - View Dependent Claims (46, 47)
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Specification