| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: method for detecting signals at expected uncertainty of their parameters involves receiving, filtering, detection, integration and comparison to threshold level. Before integration there performed is the transformation of group signal with the help of the first mixer mixing it with heterodyne signal, filtering and amplification of group signal of intermediate frequency, intermediate frequency group signal is transformed by mixing with group amplified signal after preliminary filtering and amplification, with the help of the second mixer the resulting group signal undergoes narrow-band filtering, is detected by amplitude and supplied to integrator input.EFFECT: increase of sensitivity at signal detection and significant reduction of signal levels fluctuation.1 dwg |
