World Academy of Science, Engineering and Technology
Published January 27, 2008 | Version 15005
Journal article Open

A Study on the Least Squares Reduced Parameter Approximation of FIR Digital Filters

Description

Rounding of coefficients is a common practice in hardware implementation of digital filters. Where some coefficients are very close to zero or one, as assumed in this paper, this rounding action also leads to some computation reduction. Furthermore, if the discarded coefficient is of high order, a reduced order filter is obtained, otherwise the order does not change but computation is reduced. In this paper, the Least Squares approximation to rounded (or discarded) coefficient FIR filter is investigated. The result also succinctly extended to general type of FIR filters.

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References

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