Filter Design Techniques explains how to design analog, digital, and matched filters. It is intended for practicing engineers and scientists who have a background in Fourier, Laplace, and z transforms. Part 1 is concerned with analog Butterworth and Chebyshev filter design. Part 2 explains IIR and FIR digital filter design. Part 3 introduces adaptive design of templates for pattern recognition and matched filters for signal detection. The design technique in Part 3 takes into account both the signal to be detected and the differences and similarities to all the other signals or patterns. This is a unique feature not found in other textbooks.