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Sharpening of partially non-recursive CIC decimation filters

Stephen, G. and Stewart, R.W. (2004) Sharpening of partially non-recursive CIC decimation filters. In: Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004-11-07 - 2004-11-10.

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Abstract

The cascaded integrator comb filter is commonly used as a first stage decimation filter in communications systems. This paper reviews sharpening techniques for correcting the passband 'droop' present in the frequency response of these filters. A variation on an existing technique that would allow a partially non-recursive (and, therefore, potentially higher speed) implementation is presented for CIC filters with power of two decimation ratios.