Pulse or digital communications – Repeaters – Testing
Patent
1989-05-12
1990-08-07
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 80, 329310, H03D 106
Patent
active
049474081
ABSTRACT:
In a digital device having an input thereto comprising a digital sample stream at a frequency F, a method for employing a component therein designed to work at a frequency less than F. The method in general comprises the steps of, dividing the digital sample stream into odd and even digital sample streams each at a frequency of F/2; passing one of the digital sample streams through the component designed to work at a frequency less than F wherein said component responds only to the odd or even digital samples in the one of the digital sample streams; delaying the other of the digital sample streams for the time it takes the one of the digital sample streams to pass through the component; and, adding the one of the digital sample streams after passing through the component with the delayed other of the digital sample streams. In the specific example, the component is a finite-impulse-response filter of order [(N+1)/2] and the step of delaying comprises passing the other of the digital sample streams through a shift register for a time (in sampling periods) of [(N+1)/2]+r, where r is a pipeline delay through the finite-impulse-response filter.
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Hurd William J.
Sadr Ramin
Bocure Tesfaldet
Glenn Charles E. B.
Jones Thomas H.
Manning John R.
Safourek Benedict V.
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