Patent ID: 11940541
Assignee: HONEYWELL INTERNATIONAL INC.
Field: nan (nan)
Classification: CPC nan | IPC G  H

Claim 6:
7. A system comprising:
an antenna that receives signals, wherein the received signals comprise a weak portion associated with one or more GNSS satellites and a strong interference portion;
an interference isolator that receives the received signals as an input and provides an estimated strong interference portion as an output, wherein the interference isolator is configured to:
convert the received signals into digital signals;
perform a fast Fourier transform on the digital signals;
remove the weak portion of the Fourier transformed digital signals to create the estimated strong interference portion by setting frequency bins of the Fourier transformed digital signal to zero that have a signal power less than a power level threshold, wherein the power level threshold is at least one of a threshold percentage of a signal component having a largest magnitude and an expected highest magnitude for a GNSS signal;
perform an inverse fast Fourier transform on the estimated strong interference portion;
quantize the estimated strong interference portion to a number of bits used by a digital-to-analog converter;
estimate noise generated during quantization of the estimated strong interference portion to generate a quantization noise estimate; and
convert the estimated strong interference portion to an analog estimated strong interference portion;

a summer that subtracts the analog estimated strong interference portion from the received signals to create a summed signal;
a local noise remover that digitally converts the summed signal into a digital summed signal and subtracts the quantization noise estimate from the digital summed signal; and
a GNSS receiver coupled to receive the digital summed signal.