Patent ID: 6473469
Filing Date: 2002-10-29
Classification: H04L

Abstract:
A local communication system for transmitting a digital serial data signal of at least 1.4 Mbps gross data rate, the system comprising a first station including an encoder and a second station including a decoder connected to the encoder of the first station by electrical conductors, the encoder of the first station comprising:carrier signal generating means for generating a carrier signal at a carrier frequency without using digital synthesis; a phase shift keying (PSK) modulation circuit responsive to said digital serial data signal for selectively outputting one of (a) said carrier signal and (b) its inverse, dependent on the value of said digital serial data signal so as to generate a PSK waveform; and driver means for imposing said PSK waveform on said conductors, the decoder of the second station being a decoder for decoding said PSK waveform so as to recover the digital serial data signal.