Photorefractive phased array beamforming with true-time-delay processing

We introduce a new optical approach to the problem of implementing true-time-delay (TDD) beamforming for a large N-element adaptive array that requires only 2 tapped delay lines (TDLs) instead of the conventional N TDLs. This new algorithm, BEAMTAP (Broadband and Efficient Adaptive Method for TTD Ar...

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Bibliographic Details
Published inInternational Topical Meeting on Microwave Photonics. Technical Digest (including High Speed Photonics Components Workshop) (Cat. No.98EX181) pp. 103 - 106
Main Authors Kirulata, A., Silveira, P.E.X., Kriehn, G., Weaver, S., Wagner, K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Adaptive arrays
Adaptive optics
Array signal processing
Delay lines
Holographic optical components
Optical arrays
Optical distortion
Optical feedback
Phased arrays
Photorefractive effect
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Summary:We introduce a new optical approach to the problem of implementing true-time-delay (TDD) beamforming for a large N-element adaptive array that requires only 2 tapped delay lines (TDLs) instead of the conventional N TDLs. This new algorithm, BEAMTAP (Broadband and Efficient Adaptive Method for TTD Array processing) is capable of processing very large phased array radar systems with thousands of receiving elements with GHz of bandwidth. The corresponding digital processing load that would be required to solve such large, broadband adaptive array problems exceeds 10/sup 15/ multiply-accumulate operations per second: well beyond the capability of current electronic systems.
ISBN:0780349369
9780780349360
DOI:10.1109/MWP.1998.745555