On bandlimited signals with minimal space/time-bandwidth product

Abstract

We deal with the pmhlem of determining handlimited signals which have the lowest spacdtime-bandwidth product. We Dmuose two aDDroaches to the urohlem: the first is based onThe equality in (4) is satisfied only by the Gaussian function, exp (-$). ( F~~ a survey on the uncefiainty inequality (4), --rl l , the samples of the signal. signals which are bandlimired, i.e.,