Digital Signal Processing Tools

• sddsconvolve -- Does FFT convolution, deconvolution, and correlation. Example application: computing the ideal impulse response of a system after you've measured the response to a pulse.

• sddsdigfilter -- Performs time-domain digital filtering of column data. Example applications: low pass, high pass, band pass, or notch filtering of data to eliminate unwanted frequencies.

• sddsfdfilter -- Performs frequency-domain filtering of column data. Example application: applying a filter that is specified as a table of attenuation and phase as a function of frequency.

• sddsfft -- Does Fast Fourier Transforms of column data. Example application: finding signficant frequency components in time-varying data, or finding the integer tune of an accelerator from a difference orbit.

• sddsnaff -- Does Numerical Analysis of Fundamental Frequencies, a more accurate method of determining principle frequencies in signals than the FFT.