"Sampled data systems." . . . . . . . "Feasibility study, software design, layout and simulation of a two-dimensional fast Fourier transform machine for use in optical array interferometry final report on the NASA FTT project covering the period June 1, 1989 to September 1, 1994"@en . . . . . . . . . . . . . "Signal processing." . . "Systolic arrays." . . "Feasibility analysis." . . "Architecture (Computers)" . . "Microprocessors." . . . . "Fast Fourier transformations." . .