Device and method for jammer resistance in broadband receivers
AssigneeNXP B.V.
InventorsAndreas RECHBERGER, Christian WINTER, Reinhold SCHMIDT
Life of this patent
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Abstract
A multiband heterodyne receiver, and method, having a source of a received signal, a local oscillator that outputs a local oscillator signal, and a mixer that combines the received signal and the local oscillator signal to generate a combined signal. The local oscillator signal can be adjusted in accordance with a detected jamming signal. A DC filter receives the combined signal and attenuates a DC component of the combined signal so as to output a DC filtered signal, and an analog-to-digital converter receives the DC filtered signal and converts the DC filtered signal to a digital signal.
Claims24
A multiband heterodyne receiver, comprising:
- a source of a received signal;
- a local oscillator that outputs a local oscillator signal;
- a mixer that combines the received signal and the local oscillator signal to generate a combined signal having a DC component;
- a DC processing unit that receives the combined signal and attenuates a DC component of the combined signal so as to output a DC filtered signal;
- and
- an analog-to-digital converter that receives the DC filtered signal and converts the DC filtered signal to a digital signal.
6A. The multiband heterodyne receiver according to claim 1, wherein the DC processing unit is at least one of a DC filter and a DC offset compensator.
A multiband heterodyne receiver, comprising:
- a source of a received signal;
- a detector which senses when the received signal includes a jamming signal and which, in response to the jamming signal, outputs an adjustment signal;
- an adjustable local oscillator that outputs a local oscillator signal having a frequency and receives the adjustment signal, wherein the adjustable local oscillator sets the frequency of the local oscillator signal in response to the adjustment signal;
- a mixer that combines the received signal and the local oscillator signal to generate a combined signal;
- a DC filter that receives the combined signal and attenuates a DC component of the combined signal so as to output a DC filtered signal;
- and
- an analog-to-digital converter that receives the DC filtered signal and converts the DC filtered signal to a digital signal.
A method of attenuating a jamming signal within an incoming signal, comprising:
- receiving the incoming signal;
- mixing the incoming signal with a local oscillator signal to generate a combined signal;
- attenuating a DC component of the combined signal so as to output a DC filtered signal;
- and
- converting the DC filtered signal to a digital signal.
A method of attenuating a jamming signal within an incoming signal, comprising:
- receiving the incoming signal;
- detecting if the incoming signal includes the jamming signal and, when the jamming signal is detected, generating an adjustment signal;
- providing a local oscillator signal having a frequency selected in accordance with the adjustment signal;
- mixing the incoming signal with the local oscillator signal to generate a combined signal;
- attenuating a DC component of the combined signal so as to output a DC filtered signal;
- and
- converting the DC filtered signal to a digital signal.
A method of operating a multiband heterodyne receiver having a source of a received signal, a local oscillator that outputs a local oscillator signal at a frequency, a mixer that combines the received signal and the local oscillator signal to generate a combined signal, and an analog-to-digital converter that receives the combined signal and converts the combined signal to a digital signal across an ADC band, when a jamming signal is present in the received signal, comprising:
- selecting the frequency of the local oscillator signal;
- and
- mixing the local oscillator signal with the received signal so that, due to the selected frequency of the local oscillator signal, the jamming signal is moved out of the ADC band.
Dependencies are inferred from the claim text.