DIGITAL PHASE-SHIFT KEYED SIGNAL-TO-NOISE RATIO METER Russian patent published in 2024 - IPC G01R29/26 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in systems for transmitting discrete information to determine the signal-to-noise ratio and estimate the quality of a communication channel when used as phase-shift keyed information signals. Digital signal-to-noise ratio meter comprises an analogue-to-digital converter (ADC), a clock pulse generator (CPG), shift register of multi-bit codes by four counts (SR4), first and second channels of quadrature processing (QPC), each of which contains a subtractor and series-connected sample processing units (SPU), quadratic transducer (QT), functional transducer (FT), result generator (RG). Meter is equipped with a comparator (C), a threshold sensor (TS) and an accumulator A. First input of C is connected to the output of the FT, and the second input of C is connected to the output of the TS and is configured to receive the threshold level code specified by the threshold sensor (TS). First input of A is connected to the output of the comparator, and its second input is configured to receive symbol synchronization pulses (SSP) from the synchronization system of the demodulator. Output of the accumulator is connected to the first input of the RG, the second input of the RG is connected to the output of the TS. Control inputs of the ADC, SR4, readings processing units and MPN are connected to the control outputs of the clock pulse generator, the output of the RG is configured to generate a binary code of the measured signal-to-noise ratio h and is the output of the device.

EFFECT: high accuracy of measuring signal-to-noise ratio.

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