Research on UWBDBF Using Direct Time Delay Compensation Based on Up-sampling Technology and High-order HermiteInterpolation Filter Sets

doi:10.3969/j.issn.1000-1093.2015.04.018

Abstract

Abstract: Direct time delay (DTD) compensation is an effective method for beamforming of ultra-wideband (UWB) signal. The digital beam-forming (DBF) performance is directly related to the frequency response of the DTD filter. Based on the analysis of problems existing in Lagrange interpolation filter, a novel method utilizing interpolation filter sets with fixed coefficients is presented to implement DBF. High-order Hermite interpolation filter sets with simple structure combing multi-channel up-sampling technology are applied to DTD and the DBF of UWB signals is achieved by multi-channel delay compensation. Theoretical analysis and simulation results show that the proposed method is featured by a more accurate recovery of UWB signals when sampling rate is less than the Nyquist rate. It has a better real-time and an obviously superior DBF performance compared to the traditional methods such as Lagrange.

Key words: radar engineering, UWB radar, beamforming, high-order Hermite interpolation, up-sampling

CLC Number:

TN958.6

DU Qiang, SONG Yao-liang, JI Chen-he, CAO Dong. Research on UWBDBF Using Direct Time Delay Compensation Based on Up-sampling Technology and High-order HermiteInterpolation Filter Sets[J]. Acta Armamentarii, 2015, 36(4): 696-702.

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