NOVEL METHODS OF DIGITAL PHASE SHIFTING TO ACHIEVE ARBITRARY VALUES OF TIME DELAY

Authors
  1. Mohammed, A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
In many signal processing applications such as in underwater acoustic array beamforming, the need arises to implement digital phase shifters. Conventional methods of implementation make use of digital interpolation and decimation to derive FIR (Finite-duration Impulse Response) realizations. Such filters, however, are capable of providing delays that are only rational fractions of the unit delay. To obtain delays that are arbitrary factors of the unit delay, two novel methods are presented: the first method makes use of a windowing technique and the second method makes use of a frequency-sampling approach.
Report Number
DREA-85-106 —
Date of publication
15 Sep 1985
Number of Pages
42
DSTKIM No
85-03732
CANDIS No
48491
Format(s):
Hardcopy;Originator's fiche received by DSIS

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