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More General Real FIR Filters
So far we have looked at the design of linear phase filters. In this
case,
,
and
are all real. In some
applications, we need to specify both the magnitude and
phase of the frequency response. Examples include
- minimum phase filters [263],
- inverse filters (``deconvolution''),
- fractional delay filters [266],
- interpolation polyphase subfilters (Chapter 11)
complex), and the matrix
remains a more general Fourier transform matrix that cannot be reduced
to a matrix of cosines.
Next Section:
Nonlinear-Phase FIR Filter Design
Previous Section:
Chebyshev FIR Design via Linear Programming
