Data transmission utilizing phaseshift modualtion

Claim 1

A COMMUNICATION SYSTEM COMPRISING FIRST TRANSMISSION MEANS FOR TRANSMITTING SIGNALS COMPOSED OF REFERENCE PULSES AND BINARY DATA PULSES MODULATED ON A CARRIER WAVE, SAID TRANSMISSION MEANS INCLUDING MODULATING MEANS, MEANS FOR SUPPLYING SAID REFERENCE PULSES AND SAID BINARY DATA PULSES TO SAID MODULATING MEANS TOGETHER WITH SAID CARRIER WAVE, SAID MODULATING MEANS MODULATING SAID CARRIER WAVE BY SHIFTING THE PHASE POSITIONS OF SAID CARRIER WAVE 180* RELATIVELY TO ONE ANOTHER AND MODULATING THE CARRIER WAVE BY SAID REFERENCE PULSES BY AT LEAST ONE PHASE SHIFTING OF 90* OF SAID PHASE POSITION; RECEIVING MEANS FOR RECEIVING SAID TRANSMITTED MODULATED SIGNALS, SAID RECEIVING MEANS HAVING ONE INPUT AND TWO OUTPUTS, ONE FOR DATA PULSES AND ONE FOR REFERENCE PULSES, A PHASE DETECTOR FOR DETECTING SAID DATA PULSES, SAID PHASE DETECTOR HAVING A FIRST AND A SECOND INPUT AND AN OUTPUT, THE FIRST INPUT OF THE DETECTOR BEING CONNECTED TO THE INPUT OF THE RECEIVING MEANS AND THE OUTPUT OF THE DETECTOR BEING CONNECTED TO THE OUTPUT FOR DATA PULSES, MEANS FOR DETECTING SAID REFERENCE PULSES, SAID REFERENCE PULSE DETECTING MEANS BEING CONNECTED BETWEEN THE INPUT OF THE RECEIVING MEANS AND SAID OUTPUT FOR REFERENCE PULSES, MEANS FOR REGENERATING SAID CARRIER WAVE FROM THE INPUT SIGNAL, A PHASE SHIFTER HAVING A FIRST AND A SECOND INPUT FOR SHIFTING THE PHASE OF SAID REGENERATED CARRIER WAVE 180*, SAID REGENERATING MEANS HAVING ITS INPUT CONNECTED TO THE INPUT OF THE RECEIVING MEANS AND ITS OUTPUT CONNECTED TO SAID FIRST INPUT OF SAID PHASE SHIFTER, THE OUTPUT OF WHICH IS CONNECTED TO SAID SECOND INPUT OF SAID PHASE DETECTOR, A BI-STABLE CIRCUIT CONNECTED TO SAID SECOND INPUT OF SAID PHASE SHIFTER SO AS TO CAUSE 180* PHASE SHIFTING IN THE CARRIER WAVE UPON ITS ACTIVATION, AND MEANS PRODUCING POSITIVE AND NEGATIVE PULSES RESPECTIVELY RESPONSIVE TO SAID REFERENCE PULSES AND ACTIVATING SAID BI-STABLE CIRCUIT BY MEANS OF ONE OF SAID POSITIVE OR NEGATIVE PULSES; AND SECOND TRANSMISSION MEANS FOR TRANSMITTING SAID MODULATED PULSES FROM SAID MODULATING MEANS TO SAID RECEIVING MEANS, SAID SECOND TRANSMISSION MEANS CONNECTING SAID MODULATING MEANS AND SAID INPUT OF SAID RECEIVING MEANS.