Wireless communication device and method for reducing in-band interference in a gps receiver
AssigneeInfineon Technologies Agst.-Martin-Str.53 Munich, Germany 81669
InventorJoakim Landmark
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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.
Claims24
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.
A wireless communication device comprising:
- 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.
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.
A method of reducing in-band interference in received GPS signals comprising:
- 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.
Dependencies are inferred from the claim text.