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Abstract

An M-element waveform data sequence representative of an analog input signal during a period of interest is produced by first amplifying the input signal with a linear amplifier and periodically digitizing the amplifier output signal to produce a first data sequence having M+N-1 elements. The first N-1 elements of the first data sequence represent magnitudes of the amplifier output signal preceding the period of interest, and the remaining M elements of the first data sequence represent magnitudes of the amplifier output signal during the period of interest. The first data sequence is applied as input to a digital filter which produces an output second data sequence wherein each element of the second data sequence corresponds to an element of the first data sequence and is a linear combination of its corresponding first data sequence element and N-1 data preceding data elements of the first data sequence. The impulse response of the filter is adjusted to compensate for signal distortion caused by the amplifier. The desired M-element waveform data sequence is then obtained as the last M elements of the second data sequence.

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