Dual-channel quadrature-modulation pulse transmission system with dc component transmitted in separate channel
阅读：22发布：2023-07-20
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1. A PULSE TRANSMISSION SYSTEM FOR THE TRANSMISSION OF PULSE SIGNALS IN A GIVEN TRANSMISSION BAND, COMPRISING A TRANSMITTER, A RECEIVER, AND A TRANSMISSION PATH BETWEEN SAID TRANSMITTER AND RECEIVER, SAID TRANSMITTER COMPRISING A SOURCE OF FIRST AND SECOND PULSE SIGNALS, FIRST AND SECOND TRANSMITTER CHANNELS, MEANS APPLYING SAID FIRST AND SECOND SIGNALS TO SAID FIRST AND SECOND TRANSMITTER CHANNELS RESPECTIVELY, AT LEAST ONE OF SAID CHANNELS INCLUDING MEANS FOR SUPRESSING THE DIRECT CURRENT COMPONENT OF SIGNALS IN SAID ONE CHANNEL, A SOURCE OF COMMON CARRIER OSCILLATIONS, FIRST AND SECOND MODULATOR MEANS FOR MODULATING SAID CARRIER OSCILLATIONS WITH THE SIGNALS OF SAID FIRST AND SECOND CHANNELS RESPECTIVELY WITH A MUTUAL PHASE DISPLACEMENT OF 90*, MEANS PROVIDING PILOT OSCILLATIONS OF THE FREQUENCY OF SAID CARRIER OSCILLATIONS, AN AUXILIARY TRANSMISSION CHANNEL INCLUDING A SOURCE OF AUXILIARY OSCILLATIONS, MEANS FOR MODULATING SAID AUXILIARY OSCILLATIONS WITH THE SIGNALS APPLIED TO SAID ONE CHANNEL TO PRODUCE MODULATED OSCILLATIONS HAVING ONLY MODULATION COMPONENTS RELATED TO THE DIRECT CURRENT COMPONENTS OF SAID SIGNALS APPLIED TO SAID ONE CHANNEL, MEANS FOR APPLYING SAID PILOT OSCILLATIONS AND THE OUTPUTS OF SAID FIRST AND SECOND MODULATOR MEANS TO SAID TRANSMISSION PATH IN THE CENTRAL PART OF SAID TRANSMISSION BAND, AND MEANS FOR APPLYING SAID MODULATED AUXILIARY OSCILLATIONS TO SAID TRANSMISSION PATH IN AN OUTER PORTION OF SAID TRANSMISSION BAND OUTSIDE THE PORTION THEREOF IN WHICH THE OUTPUTS OF SAID FIRST AND SECOND MODULATORS ARE TRANSMITTED; SAID RECEIVER COMPRISING FIRST AND SECOND RECEIVING CHANNELS FOR RECEIVING SIGNALS IN SAID CENTRAL PART OF SAID TRANSMISSION BAND, EACH OF SAID RECEIVING CHANNELS COMPRISING DEMODULATOR MEANS AND PULSE REGENERATOR MEANS, MEANS CONNECTING EACH SAID DEMODULATOR MEANS TO SAID TRANSMISSION PATH, AND MEANS CONNECTING THE OUTPUT OF SAID DEMODULATOR MEANS TO SAID PULSE REGENERATOR MEANS OF THE RESPECTIVE CHANNEL, SAID RECEIVER FURTHER COMPRISING MEANS PROVIDING A LOCAL CARRIER OSCILLATION SYNCHRONIZED WITH SAID PILOT OSCILLATIONS, MEANS APPLYING SAID LOCAL CARRIER OSCILLATIONS TO THE DEMODULATOR MEANS OF SAID FIRST RECEIVER CHANNEL FOR DEMODULATING THE SIGNALS CORRESPONDING TO SIGNALS OF SAID FIRST TRANSMITTER CHANNEL WHICH WERE TRANSMITTED WITH SUPPRESSION OF THE DIRECT CURRENT COMPONENT, THE MEANS CONNECTING THE OUTPUT OF THE DEMODULATOR MEANS TO THE PULSE REGENERATOR MEANS OF THE FIRST RECEIVER CHANNEL INCLUDING ADDING MEANS, AN AUXILIARY RECEIVING CHANNEL FOR RECEIVING SIGNALS IN SAID OUTER PORTION OF SAID TRANSMISSION BAND, SAID AUXILIARY CHANNEL INCLUDING DEMODULATOR MEANS, AND MEANS FOR APPLYING THE OUTPUT OF SAID AUXILIARY RECEIVING CHANNEL TO THE INPUT OF THE ADDING MEANS OF SAID FIRST RECEIVER CHANNEL.
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