Motorola Corporation

Maurice Bernard Aufderheide

Sam M Daniel

Guy Vernon Morris

Digital scaling apparatus adapted to receive a plurality of digital signals each composed of a plurality of bits which first encodes each of the digital signals in accordance with the number of left shifts possible in each signal without losing any data, and then compares the encoded signals to select the largest digital signal, which selected encoded signal is used as a command to shift all of the digital signals an amount necessary to left justify the largest digital signal.

Digital scaling apparatus

A digital filter for generating a frequency domain output signal in response to an incoming signal arriving in successive receiving cycles whenever the incoming signal has any frequency component lying within the passband of the filter. A means for generating a timing signal is provided. An analog-to-digital converter responsive to the timing signal converts the incoming analog signal into a series of digital input pulses during each range gate interval. A reference generator responsive to the timing signal provides a train of digital reference pulses for each of the successive receiving cycles. A predetermined number of successive receiving cycles constitutes a single correlation frame. The amplitude of each train of digital reference pulses is determined by a composite correlation function. A multiplier multiplies each digital reference pulse with each digital input pulse to generate a train of discrete digital output pulses for each receiving cycle. An accumulator stores the discrete digital output pulses from the multiplier and generates a frequency domain output signal for each frame of reference pulses. The digital filter can also be constructed with either a two-channel or four-channel processor to provide a more sophisticated filter system.

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Scottsdale, AZ, United States of America

Maurice Bernard Aufderheide