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Book Review
Digital Filter Design Solutions, by Jolyon M. De Freitas, Artech-House 2005, ISBN 1-58053-759-6
Reviewed by Vladimir Botchev [vladimir.botchev@analog.com]
This is a cookbook of ready-to-use FIR filter designs.
The author has done a quite decent job of classifying and collecting an impressive number of normalized, carefully optimized FIR filters. Even in these days of an almost ubiquitous Matlab filter design package, Dr. De Freitas’s book can serve as a highly practical and reliable source for fast prototyping and embedding of various FIR filters in numerous applications.
In the first two chapters, the author discusses the principal motivation for a reference of its kind and provides a crash course—very well crafted—on FIR design. The following three chapters (for low-, high-, and bandpass filters, respectively) employ the filter-characteristics-presentation and coefficient-quantization techniques introduced in the first of these chapters, i.e., Chapter Three, on low-pass filtering. The cookbook-form designs then follow, in an easy-to-use format.
Chapter Six presents the design of differentiators and many of the practical issues associated with this particular function, such as stability and noise amplification. The last chapter is concerned with the design of Hilbert transformers and their applications for demodulation, arbitrary phase-shift, and instantaneous waveform-parameter estimation.
The CD accompanying the book contains all filter designs discussed in the main text. The combination of this book and its CD is recommended for situations where fast “plug-in” prototyping is necessary, especially considering that converting filter coefficients to fixed point has been given special consideration—and is well-documented.
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