Registers – Transfer mechanism – Traveling pawl
Patent
1975-12-17
1977-03-08
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
235156, 328167, 343 5DP, 343 77, G01S 942, G06F 1534
Patent
active
040114384
ABSTRACT:
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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patent: 3914763 (1975-10-01), Green et al.
W. Roecker, "The Application of Digital Filters for Moving Target Indication", IEEE Trans. on Audio and Electroacoustics, 3-1971, pp. 72-77.
Aufderheide Maurice Bernard
Morris Guy Vernon
Motorola Inc.
Parsons Eugene A.
Smith Jerry
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