Pulse or digital communications – Repeaters – Testing
Patent
1985-04-25
1988-05-31
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
333 28R, 381 34, 375 1, H04B 162, H04B 1500
Patent
active
047486392
ABSTRACT:
In a data transmission system including a transmission medium that is subject to fast fades of duration longer than individual data symbols to be transmitted, a chirp filter is provided for time-spread processing the data signals prior to transmission. The processing spreads the energy of each symbol over an interval longer than the length of expected individual fades. In a receiving terminal inverse processing is provided to remove the chirp effect.
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American Telephone and Telegraph Company AT&T Bell Laboratories
Cubert Jack S.
Safourek Benedict V.
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