SYSTEM FOR DETERMINING WATER SURFACE VIBRATIONS Russian patent published in 2014 - IPC G01V9/00 G01V1/38 G08B21/10 

FIELD: physics.

SUBSTANCE: system includes atmospheric pressure fluctuation receivers (microbarographs) 1.i (i= 1, 2, …, n), a comparator circuit 2, a notification system 3, a memory unit 4, first 5 and second 6 correlators, first 3.1 and second 3.2 analogue-to-number converters, first 3.3 and second 3.4 switches, a modulating code former 3.6, a master generator 3.6, a phase-shift keying device 3.7, a power amplifier 3.8, a transmitting antenna 3.0, multipliers 5.1 and 6.1, lowpass filters 5.2 and 6.2, optimal controllers 5.3 and 6.3, controlled delay lines 5.4 and 6.4. A control station 7 has a receiving antenna 7.1, a high-frequency amplifier 7.2, a heterodyne 7.3, a mixer 7.4, an intermediate frequency amplifier 7.5, first 7.6, second 7.7, third 7.11 and fourth 7.12 multipliers, first 7.8 and second 7.13 narrow bandpass filters, first 7.9 and second 7.14 lowpass filters, a recording and analysis unit 7.11, and first 7.15 and second 7.16 phase inverters.

EFFECT: high noise-immunity and reliability of receiving phase-shift keyed composite signals by attenuating narrow-band interference.

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