Advanced Adaptive Beamforming/Nullsteering CRPA with Robust Bias Compensation for Rotorcraft Precision Navigation

Award Information
Agency:
Department of Defense
Branch
n/a
Amount:
$79,926.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
N68335-11-C-0281
Award Id:
n/a
Agency Tracking Number:
N111-015-1146
Solicitation Year:
2011
Solicitation Topic Code:
N111-015
Solicitation Number:
2011.1
Small Business Information
4106 Aikins Ave SW, Seattle, WA, -
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
831822668
Principal Investigator:
David Lorenzo
Research Lead and Co-Foun
(650) 793-4876
dsd@lrtechno.com
Business Contact:
Chad Jennings
CEO and Co-Founder
(650) 430-0458
chad@lrtechno.com
Research Institution:
Stub




Abstract
Lightning Ridge Technologies advances the state of the art of Controlled Reception Pattern Antennas (CRPAs) for rotorcraft by developing an adaptive beamsteering technology to significantly mitigate hostile jamming while estimating and cancelling GPS signal variations that plague rotorcraft operations. These variations include but are not limited to rotor interference, manufacturing variability and electronic mutual coupling in the antennas, and airframe and environmental changes that alter signal scattering, diffraction, and reflection. Most problematic for precision navigation and adaptive CRPA processing, the main rotor states contributing to rotor blade modulation (RBM) are currently not measured in real-time on operational helicopters (e.g., the MH-60). The proposed architecture utilizes a two part estimation scheme to account for the biases. Carrier-phase biases are quickly varying, and should be calibrated in real-time. Pseudorange errors can be smoothed over longer periods, and these biases cause less effect on the sensitive beamsteering algorithms; thus pseudorange biases should be calibrated off-line. Lightning Ridge Technologies"experts have designed CRPA systems to land jets on aircraft carriers (Navy JPALS Program); this prior knowledge enables us to create a feasible approach providing significant benefits to rotorcraft aviation.

* information listed above is at the time of submission.

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