Title :
Onboard digital beamforming: Algorithm and results
Author :
Ghaemi, Hirad ; Shaffer, Scott ; Hensley, Scott
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
A one-dimensional digital beam-forming (DBF) algorithm that is suitable for onboard real-time implementation is described in this article. A couple of techniques for generating a set of DBF coefficients will be also proposed to improve radar system performance such as signal-to-noise ratio (SNR) and/or range ambiguity (as a part of multiplicative noise ratio, MNR), and range impulse response parameters including compression gain, range resolution, etc. Results from simulations demonstrate improvement obtained by these techniques at the output of digital beamforming process. Finally, via the proposed onboard DBF algorithm, a processed synthetic aperture radar (SAR) image generated from data of airborne SweepSAR experiment [1] is exhibited.
Keywords :
array signal processing; radar imaging; radar signal processing; synthetic aperture radar; 1D DBF algorithm; 1D digital beamforming; DBF coefficients; MNR; SAR image; SNR; airborne SweepSAR experiment; compression gain; multiplicative noise ratio; onboard digital beamforming; radar system performance; range ambiguity; range impulse response parameters; range resolution; signal-noise ratio; synthetic aperture radar; Array signal processing; Radar imaging; Receiving antennas; Signal to noise ratio; Synthetic aperture radar; Table lookup; Beam forming; DBF; SAR; SNR;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6947321
