The mathematical relationships that describe an amplitude-modulated data system are developed in a form suitable for programming on a highspeed digital computer. These equations contain expressions that specify in general terms the transmission-frequency characteristics of a transmission medium. A data signal composed of a train of raised-cosine shaped pulses is generated in the stimulating process. The simultation provides a means for computing the resulting response of systems to pulse trains. The performance of a doable-sideband AM data system is evaluated from measurements of the maximum vertical opening, or aperture, of the eye pattern formed by the received signal. This aperture is related to the system performance in terms of signal-to-noise ratio and error rate of the system. A verification of this technique is made by simultaing the conditions of an experimental laboratory data system on the computer and comparing computed and measured performance.
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R. A. Gibby (1960) studied this question.
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