GPS receiver with improved immunity to collocated transmissions and method therefor
AssigneeSiGe Semiconductor (Europe) Limited
InventorsHoward Smith, Stefan Fulga, Paul Wallis
Life of this patent
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Abstract
A method and apparatus for limiting the effect of interfering transmission on a Global Positioning System (GPS) receiver is disclosed. A first mode of operation of the GPS receiver is provided wherein the AGC of the receiver is operated in a linear state. A second mode of operation of the GPS receiver is provided wherein the AGC of the receiver is operated in a non-linear state. A first signal is provided indicating a presence of a jamming signal. In response to the first signal the GPS receiver is switched from the first mode of operation to the second mode of operation.
Claims36
A method of limiting the effect of interfering transmission on a Global Positioning System (GPS) receiver, the method comprising:
- in a first mode of operation, operating an AGC of the receiver in a linear state;
- in a second other mode of operation, operating the AGC in a non-linear state;
- receiving a first signal indicative of a presence of a jamming signal;
- and,
- switching the receiver from the first mode of operation to the second mode of operation, in dependence upon the first signal.
A method of limiting the effect of interfering transmission on a Global Positioning System (GPS) receiver, the method comprising:
- in a first mode of operation, operating an analogue to digital converter of the receiver in a multi-bit operating mode;
- in a second other mode of operation, operating the analogue to digital converter of the receiver in a one-bit operating mode;
- receiving a first signal indicative of a presence of a jamming signal;
- and,
- switching the receiver from the first mode of operation to the second mode of operation, in dependence upon the first signal being indicative of a presence of a jamming signal.
A Global Positioning System (GPS) receiver comprising:
- an input port for receiving a first signal, the first signal indicative of a presence of a jamming signal;
- an AGC circuit operable in a first linear mode of operation and a second non-linear mode of operation;
- a controller circuit for receiving the first signal and for switching the AGC between the first and the second mode of operation in dependence upon the received first signal.
A Global Positioning System (GPS) receiver comprising:
- an input port for receiving a first signal, the first signal indicative of a presence of a jamming signal;
- an ADC circuit operable in each of two modes of operation, a first mode having multi-bit operation and a second mode having one-bit operation;
- a controller circuit for receiving the first signal and for switching the ADC between the first mode and the second mode in dependence upon the received first signal.
A storage medium having data stored therein, the data for when executed resulting in an integrated circuit comprising:
- an input port for receiving a first signal, the first signal indicative of a presence of a jamming signal;
- an AGC circuit operable in a first linear mode of operation and a second non-linear mode of operation;
- a controller circuit for receiving the first signal and for switching the AGC between the first and the second mode of operation in dependence upon the received first signal.
A storage medium having data stored therein, the data for when executed resulting in an integrated circuit comprising:
- an input port for receiving a first signal, the first signal indicative of a presence of a jamming signal;
- an ADC circuit operable in each of two modes of operation, a first mode having one bit operation and a second mode having multi-bit operation;
- a controller circuit for receiving the first signal and for switching the ADC between the first mode and the second mode in dependence upon the received first signal.
Dependencies are inferred from the claim text.