WIRELESS COMMUNICATION DEVICE AND METHOD FOR REDUCING IN-BAND INTERFERENCE IN A GPS RECEIVER
First Claim
1. Interference reduction circuitry to reduce in-band interference in received GPS signals caused by transmissions from a handset transmitter, the interference reduction circuitry comprising:
- a filter to operate on digitized in-band signals to provide signals representing in-band interference;
a summer to subtract the signals representing in-band interference from digital GPS signals; and
control circuitry to cause the filter to provide the signals representing in-band interference when the handset transmitter is active and to cause the filter to refrain from providing the signals representing in-band interference when the handset transmitter is not active,wherein the digitized in-band signals are generated from coupled signals of the handset transmitter.
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Abstract
Embodiments of a wireless communication device and a method for reducing in-band interference in a GPS receiver are generally described herein. Other embodiments may be described and claimed. In some embodiments, an adaptive filter may be used to measure in-band interference from in-band signals generated from coupled signals of a handset transmitter. The in-band interference may be subtracted from digital GPS signals provided by the GPS receiver. In some embodiments, the in-band interference is not subtracted from the GPS signals when the handset transmitter is not active.
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Citations
24 Claims
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1. Interference reduction circuitry to reduce in-band interference in received GPS signals caused by transmissions from a handset transmitter, the interference reduction circuitry comprising:
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a filter to operate on digitized in-band signals to provide signals representing in-band interference; a summer to subtract the signals representing in-band interference from digital GPS signals; and control circuitry to cause the filter to provide the signals representing in-band interference when the handset transmitter is active and to cause the filter to refrain from providing the signals representing in-band interference when the handset transmitter is not active, wherein the digitized in-band signals are generated from coupled signals of the handset transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. A wireless communication device comprising:
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GPS receiver circuitry to generate digital GPS signals; mobile communication circuitry having a handset transmitter for transmitting mobile communication signals; and interference reduction circuitry to subtract signals representing in-band interference from the digital GPS signals caused by transmissions from the mobile communication circuitry, wherein the interference reduction circuitry comprises a filter to generate the signals representing in-band interference from digitized in-band signals that are generated from coupled signals of the handset transmitter. - View Dependent Claims (14, 19)
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15. The wireless communication device of claim 111 wherein the filter is an adaptive filter,
wherein the filter performs a minimization algorithm on the digitized in-band signals based on summer output signals to generate the signals representing in-band interference, and wherein the summer output signals are provided to correlation and position calculation circuitry of the GPS receiver circuitry.
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20. A method of reducing in-band interference in received GPS signals comprising:
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generating signals representing in-band interference from coupled signals of a handset transmitter; subtracting the signals representing in-band interference from digital GPS signals; and refraining from performing the generating and subtracting when the handset transmitter is not active. - View Dependent Claims (21, 22, 23, 24)
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Specification