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- W2056064315 abstract "To solve the space dispersion (SD) problem which makes the beam formed deviate from its expected direction in wideband digital array beamforming, a new wideband digital array beamformer (WDBF) is designed by introducing an identical variable fractional delay (VFD) filter on each sensor. The VFD filter is an all-pass filter with an infinite impulse response, thus it requires less filter order compared with finite impulse response filter. Since the VFD designed is suitable within the whole fractional delay range of-0.5 to 0.5 in sampling interval, the new beamformer designed is suitable for any direction without redesigning the fractional delay filter. In this way, the real-time property of the new beamformer is guaranteed. Simulation results show that the VFD deigned in this paper is high in precision. Applying it in the new WDBF, the SD problem is solved and the beam formed approximates the ideal beam very well." @default.
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- W2056064315 date "2015-01-01" @default.
- W2056064315 modified "2023-09-25" @default.
- W2056064315 title "Design of Wideband Digital Array Beamformer Using the Variable Fractional Delay Allpass Filter" @default.
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- W2056064315 doi "https://doi.org/10.4028/www.scientific.net/amm.719-720.826" @default.
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