Pulse or digital communications – Repeaters – Testing
Patent
1992-11-24
1994-01-18
Barron, Jr., Gilberto
Pulse or digital communications
Repeaters
Testing
3701104, 370 21, 370 18, H04L 2730, H04L 512, H04J 322
Patent
active
052805379
ABSTRACT:
A digital communication system using superposed transmission of high and low speed digital signals capable of transmitting superposed high and low speed digital signals through an identical frequency band efficiently by increasing a simultaneously transmittable number of channels in the low speed digital signals, while achieving the practically reasonable bit error rate performances for both the high speed digital signals and the low speed digital signals. In this system, the low speed digital signals are transmitted in a form of spread spectrum signals and the high speed digital signals are cancelled out from the superposed transmission signals in obtaining the output low speed digital signals by using the phase inverted replica of the high speed digital signals to be combined with the superposed transmission signals, so that it becomes possible to increase a number of channels for the low speed digital signals, while achieving the practically reasonable bit error rate performances for both the high speed digital signals and the low speed digital signals.
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Authors: Kiyoshi Enomoto, Masahiro Morikura, Shuji Kubota & Shuzo Kato Title: Common Transmission Of High Speed QPSK Signals and SSMA Signals Over Nonlinearly Amplified Transponder Date: May 1991, pp. 1155-1161 Publication: IEICE Transactions, vol. E 74, No. 5.
Enomoto Kiyoshi
Kato Shuzo
Kubota Shuji
Morikura Masahiro
Sugiyama Takatoshi
Barron Jr. Gilberto
Nippon Telegraph and Telephone Corporation
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