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High precision phase measurement using reduced sine and cosine tables

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1 Author(s)
Mahmud, S.M. ; Dept. of Electr. & Comput. Eng., Wayne State Univ., Detroit, MI, USA

A high-precision phase measurement technique, which can accurately determine the phase even when the signals are distorted by harmonics, was presented previously by the author (ibid., vol.38, p.954-60, Oct. 1989). He proposes a microprocessor-based hardware implementation of the technique. The hardware implementation requires two reduced tables: a sine table and a cosine table. If each table has i(i+5)/2 entries, then the phase can be accurately determined even if the signals are distorted by any number of harmonics in the range of second through ith harmonics

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Instrumentation and Measurement, IEEE Transactions on  (Volume:39 ,  Issue: 1 )