Pulse or digital communications – Repeaters – Testing
Patent
1988-08-22
1992-03-03
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 11, 375 27, H04L 2534, H04L 2549
Patent
active
050938436
ABSTRACT:
A digital communication system comprises a transmitter including a (1,0) precoder for precoding a unipolar input digital data stream and a bipolar converter for converting the output signal of the (1,0) precoder into a bipolar signal. The bipolar signal is transmitted through a metallic transmission line to a receiver. The receiver comprises a digitizer for digitizing the transmitted signal to and a line equalization filter for equalizing losses encountered during propagation through the transmission line. A (1,1) converter is provided for converting the output signal of the line equalization filter in a manner opposite to the bipolar converter. A clock recovery circuit derives sample timing pulses from the output of the line equalization filter. A decoder responds to the sample timing pulses to detect symbols from the output signal of the (1,1) converter to generate a replica of the original digital data stream.
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Hirosaki Botaro
Shimizu Hiroshi
Tsujimura Yasuhiro
Yoshida Toshihisa
Bocure Tesfaldet
NEC Corporation
Safourek Benedict V.
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