‘SIGMA’ is a comprehensive package for the BBC microcomputer for manipulating and analysing signals in the time and frequency domains. Its ‘high-level’ language gives it great flexibility for applications involving discrete Fourier transforms and convolution. Effects such as noise, nonlinearities, modulation and quantisation are readily simulated.
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References
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GoltenJ. W., ‘Process control simulation package, “PCS”’, IJEEE, 22, pp. 205–212 (1985)
2.
GoltenJ. W. and VerwerA. A., ‘“CODAS” — control systems design and simulation package for the BBC computer’, IEE Colloquium on the Use of Personal Computers in Control Systems Analysis, Digest No. 1986/83 (May, 1986)
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Oran BrighamE., The Fast Fourier Transform, Prentice-Hall (1974)
