RADIO COMMUNICATION LINE WITH THREE- DIMENSIONAL MODULATION Russian patent published in 2000 - IPC

FIELD: radio communication, in particular, space and earth communication systems. SUBSTANCE: transmitting part of device has power splitter, two amplitude modulators, paraphase amplifier, and two transmitting antennas. Receiving part of device has two receiving antennas, adder, subtraction unit, low-pass filter, quarter-phase shifter, and demodulator. State-of-the-art device has low stability to noise in cases, when discrete complex phase-shift keyed signals are used, which are better than wide-band frequency-modulated signals. Goal of invention is achieved by introduced carrier frequency oscillator, and angular modulation unit at transmitting part, and two tuned filters, correlation receiver, band-pass filter, amplitude clipper, key mixer and delay gates. Level of stability to noise depends on bandwidth of tuned filters. EFFECT: increased stability to noise. 10 dwg