Method and apparatus for filtering high data rate signals

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364724, 364325, G06J 100

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active

046672982

ABSTRACT:
Method and apparatus for filtering high data rate signals, using a digital type filter, without requiring an analog-to-digital converter or the multiplicaton of digital signals. The incoming signal is wideband filtered and then hard limited to produce a constant amplitude signal having either a first or second instantaneous value. The constant amplitude signal is periodically sampled and stored in a multi-bit digital shift register as logic 1 or 0 signals. In one embodiment, the logic 1 or 0 signals stored in the shift register bits are periodically read out, multiplied by respective weighting constants, and summed to provide a filtered analog output signal. In another embodiment, the combination of logic 1 and 0 signals stored in the shift register are periodically sampled and used to address a memory, which outputs a digital signal which is the calculated value of weighted sum for that shift register combination.

REFERENCES:
patent: 3521170 (1970-07-01), Leuthold et al.
patent: 3573623 (1971-04-01), Bannon et al.
patent: 3605027 (1971-09-01), Nichols et al.
patent: 3949206 (1976-04-01), Edwards et al.
patent: 3963911 (1976-06-01), Franks
patent: 4001555 (1977-01-01), Levis et al.
patent: 4120035 (1978-10-01), Cases et al.
patent: 4121295 (1978-10-01), Witt
patent: 4156876 (1979-05-01), Debuisser
patent: 4313195 (1982-01-01), Lehmann
patent: 4322810 (1982-03-01), Nakayama
patent: 4323864 (1982-04-01), Ogawa et al.
patent: 4374426 (1983-02-01), Burlage et al.
patent: 4435823 (1984-03-01), Davis et al.
Schwartz, Information Transmission, Modulation, and Noise, McGraw-Hill Book o. 1959, p. 146.
Lawson & Uhlenback, Threshold Signals, Boston Technical Publishers, Inc. 1964, p. 16.
Gregg, Analog and Digital Communication, John Wiley & Sons, Inc. 1977, p. 146-147.
Price, "A Useful Theorem for Nonlinear Devices Having Gaussian Inputs", IRE Trans. Info. Theory, IT-4(.sub.2) 69-72, (1958).
Watterson et al., "The Tricky System: A CFAR Scheme for Detecting the Presence of a Sine Wave in Gaussian Noise", Army Material Command Report 0077-8, Prepared by University of Florida, Jun. 28, 1968.
Crouse et al., "Transversal Filter with Analog-Digital Components", IBM Technical Disclosure Bulletin, vol. 11, No. 7, 1968, pp. 884-885.

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