DUAL-THRESHOLD SIGNAL DETECTOR OF PANORAMIC RECEIVER FOR SEQUENTIAL ANALYSIS Russian patent published in 2008 - IPC G01S7/41 G01S7/292 

FIELD: physics; radio technology.

SUBSTANCE: invention pertains to radio technology and can be used in panoramic receivers of jamming stations, radio direction-finders and similar devices for detecting ground based sources of radio frequency emission, functioning under conditions of interference of unknown intensity. The technical outcome is the reduction of the survey time of the analysed frequency band at a given certainty of opening a radio frequency environment. A dual-threshold scheme for decision taking is realised with automatic switching on the results of controlling the ratio of the power of the signal/noise in the resolution cell. The detector consists of a receiver antenna (1), linear receive path (2), quartz phase detectors (3.1,3.2), reference frequency generator (4), 90° phase shifting unit (5), integrators (6.1,6.2,6.3), quadratic detectors (7.1,7.2,7.3), adder (8), threshold device (17), unit for calculating coefficient K of increasing the analysis time of one resolution cell (14), unit for generating the first and second thresholds (16), switches (9.1,9.2,9.3), comparators (10.1,10.2), accumulators (11.1,11.2), OR elements (13.1,13.2), device for measuring the ratio of the power of signal/noise (12), subtracting unit (15).

EFFECT: shorter time of surveying the analysed frequency band at a given certainty of opening the radio frequency environment.

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