Avoiding interference to a GPS receiver from wireless transmissions by time multiplexing GPS reception
First Claim
1. A GPS receiver comprising:
- correlation circuitry adapted to receive a control signal and provide data corresponding to a correlation of a signal with a generated frequency and a generated code at a plurality of time offsets based on said control signal, wherein said control signal is based on an occurrence of a transmission of an interference signal;
circuitry adapted to provide said generated frequency and said generated code at said plurality of time offsets to said correlation circuitry; and
2 Assignments
0 Petitions
Accused Products
Abstract
The jammer response circuitry of the present invention operates to control correlation circuitry in a GPS receiver based on an occurrence of a transmission from a wireless transmitter, thereby avoiding performance degradation in the GPS receiver due to interference caused by the transmission. In general, the jammer response circuitry activates a control signal during the transmission, thereby temporarily stopping the operation of the correlation circuitry. More particularly, the accumulation of results of a correlation of a received signal with a generated frequency and a generated code having numerous time offsets is temporarily stopped when the control signal is activated and resumes operation when the control signal is deactivated.
-
Citations
13 Claims
-
1. A GPS receiver comprising:
-
correlation circuitry adapted to receive a control signal and provide data corresponding to a correlation of a signal with a generated frequency and a generated code at a plurality of time offsets based on said control signal, wherein said control signal is based on an occurrence of a transmission of an interference signal;
circuitry adapted to provide said generated frequency and said generated code at said plurality of time offsets to said correlation circuitry; and
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A system comprising:
-
a receiver frontend adapted to receive a global positioning system (GPS) signal and provide a baseband signal based on said radio-frequency signal;
correlation circuitry adapted to receive a control signal and provide data corresponding to a correlation of said baseband signal with a frequency and a generated code at a plurality of time offsets based on said control signal;
circuitry adapted to provide said generated frequency and said generated code at said plurality of time offsets to said correlation circuitry;
jammer response circuitry adapted to provide said control signal to said correlation circuitry based on an occurrence of a transmission of a communications signal; and
wireless transmission circuitry adapted to transmit said communications signal, wherein said communications signal is much stronger than said GPS signal. - View Dependent Claims (10, 11, 12, 13)
-
Specification