H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 3/32 (2006.01) H04B 3/50 (2006.01) H04L 1/20 (2006.01) H04L 25/03 (2006.01) H04L 25/49 (2006.01)
Patent
CA 2043678
ABSTRACT The present invention relates to a method for processing signals for signal transmission in the base band on a two-wire line, by using a modem. In order to reduce coupling to adjacent channels in the two-wire line, and to reduce effective line attenuation, it is proposed that the signal that is to be transmitted in a process of the above type be encoded such that each three transmit bits are combined to form a tri-bit, and one of eight discriminable sender levels for a main data channel are associated to each tri-bit, whereby the modulation rate of the symbols on the line is reduced to one-third of the bit rate.
Ericsson Austria Aktiengesellschaft
Fetherstonhaugh & Co.
Schrack Telecom-Aktiengesellschaft
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