US 12,135,378 B2
Standalone GNSS anti-jam nuller-beamformer combining SFAP and STAP
Gennady Y. Poberezhskiy, Hermosa Beach, CA (US); Edward M. Jackson, Long Beach, CA (US); Brian R. Gonzales, Hermosa Beach, CA (US); Jarrett M. Perry, Manhattan Beach, CA (US); William K. Wallace, Redondo Beach, CA (US); Paul H. Grobert, Granada Hills, CA (US); and Matthew P. Salkin, Redondo Beach, CA (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Tewksbury, MA (US)
Filed on Dec. 22, 2021, as Appl. No. 17/645,505.
Prior Publication US 2023/0194728 A1, Jun. 22, 2023
Int. Cl. G01S 19/21 (2010.01); H04B 7/08 (2006.01); H04K 3/00 (2006.01)
CPC G01S 19/21 (2013.01) [H04B 7/0842 (2013.01); H04K 3/224 (2013.01); H04K 3/90 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A standalone anti jamming (AJ) nuller-beamformer, comprising:
an antenna array comprising a plurality of antennas configured to receive an input signal that includes a sum of Global Navigation Satellite System (GNSS) signals and jamming signals from a plurality of spatial sources;
an analog and mixed signal front end to amplify, filter, down-convert, and sample the input signals of the antennas of the array;
a digital front end to filter, down-convert, and decimate the input signals of the antennas of the array;
frequency and time-domain partitioning circuitry configured to perform combined frequency-domain and time-domain partitioning of the input signals of the antennas of the array;
weight calculator circuitry to calculate weights for each of the time taps in frequency bins for each antenna channel for spatial nulling of jamming signals in each frequency bin for the partitioned signals;
weight application circuitry to apply the weights to the partitioned signals from the antennas and time taps in each of the frequency bins;
frequency and time-domain reconstruction circuitry to sum the weighted signals from the antennas and the time taps in each frequency bin and perform frequency-domain reconstruction to generate a reconstructed signal with suppressed jamming; and
sampling rate conversion circuitry to convert a sampling rate of the reconstructed signal to a sampling rate for the digital input(s) of one or more GNSS receivers.