US 12,206,485 B2
Wideband beamforming with main lobe steering and interference cancellation at multiple independent frequencies and spatial locations
Trisha Batzer, North Salt Lake, UT (US)
Assigned to ClearOne, Inc., Salt Lake City, UT (US)
Appl. No. 18/003,313
Filed by ClearOne, Inc., Salt Lake City, UT (US)
PCT Filed Apr. 14, 2022, PCT No. PCT/IB2022/053551
§ 371(c)(1), (2) Date Apr. 27, 2023,
PCT Pub. No. WO2022/219594, PCT Pub. Date Oct. 20, 2022.
Claims priority of provisional application 63/174,884, filed on Apr. 14, 2021.
Prior Publication US 2023/0268977 A1, Aug. 24, 2023
Int. Cl. H04S 7/00 (2006.01); H04B 1/10 (2006.01); H04B 7/08 (2006.01); H04R 3/04 (2006.01); H04R 5/027 (2006.01); H04R 29/00 (2006.01); H04S 3/00 (2006.01)
CPC H04B 7/086 (2013.01) [H04B 1/1027 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A wide band array that uses wideband beamforming with interference cancellation at multiple independent frequencies and spatial locations, comprising:
a first M1 set of acoustic sensors forms the first subarray and is physically configured to sense a first set of acoustic signals for a first frequency band [f1, f2] by upholding the spatial Nyquist sampling distances between the first set of acoustic sensors, a first filter bandpasses the first set of acoustic signals in the first frequency band from the first subarray;
a second M2 set of acoustic sensors forms the second subarray and is physically configured to sense a second set of acoustic signals for a second frequency band [f2, f3] by upholding the spatial Nyquist sampling distances between the second set of acoustic sensors, a second filter bandpasses the second set of acoustic signals in the second frequency band from the second subarray;
an Mnth set of acoustic sensors forms the Nth subarray and is physically configured to sense an Mnth set of acoustic signals for an Nth frequency band [fN, fedge] by upholding the spatial Nyquist sampling distances between the Mnth set of acoustic sensors, an Nth filter bandpasses the Mnth set of acoustic signals in the Nth frequency band from the Nth subarray;
a first beamformer that processes the first set of acoustic signals of the first frequency band, the first beamformer generates a steerable main lobe and at least one null region placed at spatial locations in the first frequency band;
a second beamformer that processes the second set of acoustic signals of the second frequency band, the second beamformer generates a steerable main lobe and at least one null region placed at spatial locations in the second frequency band;
an Nth beamformer that processes the Mnth set of acoustic signals of the Nth frequency band, the Nth beamformer generates a steerable main lobe and at least one null region placed at spatial locations in the Nth frequency band;
the signal output from each of the first subarray's beamformer, the second subarray's beamformer, and the Nth subarray's beamformer are summed to produce the full wideband spectrum output signal.