Method for selective filtering

Details Method for selective filtering Method for selective filtering

2006-09-12

2006-09-12

Malzahn, David H. (Department: 2124)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S319000

Reissue Patent

active

RE039283

ABSTRACT:
A method for digital clock recovery and selective filtering includes prescribing or calculating first coefficients of a prototype of a selective filter at a characteristic frequency fc for a given sampling frequency fa. Second coefficients of a selective filter are calculated at the characteristic frequency fc2from the first coefficients at points tk=Δt+k*d, where k is an integer greater than or equal to 0, by interpolating values of a continuous-time impulse response at points tk, whered=fc2*fafc*fa1The selective filter is operated with the second coefficients at fa1.

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Floyd M. Gardner: “Interpolation in Digital Modems—Part I: Fundamentals”, IEEE Transactions on Communications, vol. 41, Mar. 1993, No. 3 pp. 501-507.
Uwe Lambrette et al.: “Variable Sample Rate Digital Feedback NDA Timing Synchronization”. IEEE Vehicular Technology Conference, vol. 47, New York, 1996, pp. 1348-1352, XP-000741646.
Daeyoung Kim et al.: “Design of Optimal Interpolation Filter for Symbol Timing Recovery”, IEEE Transactions on Communications, vol. 45 No. 7, Jul. 1997, pp. 877-884, XP-000659440.
Katrien Bucket et al., Periodic Timing Error Components in Feedback Synchronizers Operating on Nonsynchronizer Signal Samples. IEEE Transactions on Communications, vol. 6, Jun. 1998, pp. 747-749, XP 000779678.

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