Pulse or digital communications – Repeaters – Testing
Patent
1988-01-13
1989-08-08
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
364825, 36472416, 333 18, H04B 1500, H04B 2710
Patent
active
048560260
ABSTRACT:
The transmitter (DTR) and the receiver (DRC) of a system for transmitting data signals at a given symbol rate 1/T comprise discrete-time smearing filters (SM and DSM) for combatting the effect of additive pulse-like disturbances (p'(t)) in the transmission channel (TCH). In many cases these disturbances (p'(t)) turn out to have a pronounced bandwidth-limited nature. By utilizing this feature the implementation of the smearing filters (SM and DSM) is simplfied and/or their performance level is improved in that the non-zero values of their impulse responses s(i) and d(j) only occur at the points of grids of the indices i and j recurring with a period of L, where L is an integer greater than 1 and where L is determined substantially by the ratio L.sub.0 of the symbol rate 1/T to twice the highest significant frequency f.sub.m of these disturbances (p'(t)).
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Bergmans Johannes W. M.
Claasen Theodoor A. C. M.
van Gerwen Petrus J.
Barschall Anne E.
Briody Thomas A.
Chin Stephen
Griffin Robert L.
Haken Jack E.
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