Desensitized filters with droop correction
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United States of America Patent
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Feb 4, 2014
Grant Date -
Sep 16, 2010
app pub date -
Mar 24, 2010
filing date -
Aug 1, 2007
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Abstract
A method and system for the design and implementation of desensitized digital filters with droop correction. The desensitized digital filter includes a first filter configured to receive an input signal, a decimator or upsampler, and a modified desensitized half-band filter. The first filter introduces droop into the passband of the desensitized digital filter. The desensitized half-band filter has a transfer function F(z)=K(1+z−1)G(z) wherein K≠0 is a scale factor, that is modified to omit a (1+z−1) factor block. The modified desensitized half-band filter compensates for the passband droop introduced by the first filter. The first filter may be a sinc filter, CIC filter, or filter having similar properties.
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