Carrier transmission system for reducing impulse noise

Claim 1

A COMMUNICATION SYSTEM COMPRISING A FIRST AND SECOND MODULATOR EACH HAVING AN INPUT AND OUTPUT CIRCUIT, A SIGNAL SOURCE COMMUNICATING WITH THE INPUT CIRCUITS OF SAID FIRST AND SECOND MODULATOR, A FIRST CARRIER WAVE SOURCE COUPLED TO SAID FIRST AND SECOND MODULATORS, MEANS FOR INVERTING THE SIGNAL APPLIED TO THE INPUT CIRCUIT OF ONE OF SAID FIRST AND SECOND MODULATORS BY SAID SIGNAL SOURCE, A TRANSMISSION LINK, A FIRST FILTER COUPLED BETWEEN THE OUTPUT CIRCUIT OF SAID FIRST MODULATOR AND SAID TRANSMISSION LINK FOR PASSING ONE SIDEBOARD OF THE OUTPUT SIGNAL OF SAID FIRST MODULATOR, A SECOND FILTER COUPLED BETWEEN THE OUTPUT CIRCUIT OF SAID SECOND MODULATOR AND SAID TRANSMISSION LINK FOR PASSING ONE SIDEBAND OF THE OUTPUT SIGNAL OF SAID SECOND MODULATOR, FIRST AND SECOND DEMODULATORS EACH HAVING AN INPUT AND OUTPUT CIRCUIT, A SECOND CARRIER WAVE SOURCE HAVING SUBSTANTIALLY THE SAME FREQUENCY OF SAID FIRST CARRIER WAVE SOURCE, MEANS FOR COUPLING SAID SECOND CARRIER WAVE SOURCE TO SAID FIRST AND SECOND DEMODULATORS, A THIRD FILTER COUPLED BETWEEN THE INPUT CIRCUIT OF SAID FIRST DEMODULATOR AND SAID TRANSMISSION LINK FOR PASSING ONE SIDEBAND PRESENT ON SAID TRANSMISSION LINK, A FOURTH FILTER COUPLED BETWEEN THE INPUT CIRCUIT OF SAID SECOND DEMODULATOR AND SAID TRANSMISSION LINK FOR PASSING THE OTHER SIDEBAND PRESENT ON THE TRANSMISSION LINK, AND MEANS FOR RECOMBINING THE DEMODULATED SIGNALS PRODUCED IN THE OUTPUT CIRCUITS OF SAID FIRST AND SECOND DEMODULATORS.