PROCESSES FOR PROCESSING AND MODULATING NEW WAVEFORMS TO BE USED ON COMMUNICATION CHANNELS

摘要

The invention relates to a processing process which generates new oscillation forms to be used for transporting information on electromagnetic, electrical or optical communication channels. According to the invention, the process consists in processing sine or triangular oscillations in order to generate a waveform with guard intervals for delimiting half-cycles with the purpose of independently amplitude-, duration- or combination-modulating each half-cycle and it is carried out by applying a constant amplitude modulation at the input of a mounting which consists of a repeater stage comprising a transistor (Q1), two polarization resistors (R1 and R2) and a third resistor (R3), two one-way rectifier units comprising a diode (D1) and a resistor (R5) for the positive half-cycle and a diode (D2) and a resistor (R6) for the negative half-cycle, in the cathode of the diode (D1) a polarization voltage of + 0.6 V being applied by means of a transistor (Q3) and in the anode of the diode (D2) a polarization voltage of - 0.6 V being applied by means of transistor (Q2), the two diodes (D1 and D2) being maintained in blocked state until the input oscillation will exceed the threshold voltage of + 0.6 V on the positive half-cycle and of - 0.6 V on the negative half-cycle, after which the two half-cycles are transferred through two capacitor-resistor units (C3, R11 and C4, R10) to a resistor (R13) which sums the two half-cycles recreating an oscillation with guard intervals between the two half-cycles, leaving the mounting through a repeater stage (Q4). The thus processed waveform combines the advantages of the sine oscillation with the advantages of the rectangular oscillation, in relation to the methods of amplitude and duration modulation, while offering a very good signal-to-noise ratio and also containing implicitly a sine reference usable upon demodulation.