Data transmission system comprising smearing filters

Details Data transmission system comprising smearing filters Data transmission system comprising smearing filters

H - Electricity

04

B

340/72

H04B 1/62 (2006.01) H03H 17/02 (2006.01)

Patent

CA 1277000

PHN 12 010 -??- 29-7-1987 ABSTRACT: Data transmission system comprising smearing filters. 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 simplified and/or their perfor- mance 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 Lo of the symbol rate 1/T to twice the highest significant fre- quency fm of these disturbances (p'(t)).

556210

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