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QR versus IQR algorithms for adaptive signal processing: performance evaluation for radar applications

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6 Author(s)
Bollini, P. ; Dept. of Syst. & Inf., Florence Univ., Italy ; Chisci, L. ; Farina, A. ; Giannelli, M.
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The authors present a novel systolic array for minimum variance distortionless response (MVDR) adaptive beamforming, based on inverse QR (IQR) updates. The array is made up of O(N2+mN) processing cells, N being the number of degrees of freedom and m the number of look directions, and allows a fully parallel and pipelined weight extraction. In this respect the proposed array overcomes the limitations of existing systolic adaptive beamformers which require O(mN2) cells and/or do not allow parallel pipelined weight extraction. In addition, the paper considers CORDIC realisation of systolic adaptive beamformers. Finally, it provides a comparative study, via simulation experiments, on the numerical properties of various systolic adaptive beamformers when implemented with CORDIC cells and operating on typical radar data

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Radar, Sonar and Navigation, IEE Proceedings -  (Volume:143 ,  Issue: 5 )