An adaptive sampling system for hybrid computation
George A. Rahe, Walter J. Karplus · 1968
The concept of sampling is central to the operation of all systems in which analog information is to be processed by a digital computer. In conventional hybrid computing and data-processing systems the continuous analog signal is represented by an amplitude-modulated pulse train in which the pulses occur at fixed intervals of time. Such synchronous sampling facilitates control by the digital computer clock and requires a minimum amount of equipment. In many applications, however, it is important to minimize the number of samples employed to represent the analog signal. For example in telemeter applications, it is important to economize transmitter power by limiting the number of samples transmitted over long communication links.