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

Claim 3:
4. A method comprising:
receiving signals through at least one antenna, wherein the received signals comprise a weak portion associated with one or more GNSS satellites and a strong interference portion;
isolating the strong interference portion from the received signals by an interference isolator, wherein isolating the strong interference portion by the interference isolator comprises:
converting the received signals into digital signals;
performing a fast Fourier transform on the digital signals;
removing the weak portion from the digital signals to create an estimated strong interference portion by setting frequency bins of the 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;
performing an inverse fast Fourier transform on the estimated strong interference portion;
quantizing the estimated strong interference portion to a number of bits used for digital-to-analog conversion;
generating a quantization noise estimate of the noise introduced into the estimated strong interference portion by the quantizer; and
converting the quantized estimated strong interference portion to an analog strong interference portion;

subtracting the analog strong interference portion from the received signals by a summer to create a summed signal;
converting the summed signal into a digital summed signal at a local noise remover; and
subtracting the quantization noise estimate from the digital summed signal at the local noise remover.