RADIO-RECEIVING DEVICE Russian patent published in 2003 - IPC

FIELD: radio engineering; telemetering systems for data receiving from mobile equipment. SUBSTANCE: radio signal being transmitted that includes protective code intervals arrives over radio link, is amplified and converted into intermediate- frequency signal, amplified in intermediate-frequency amplifier, and arrives at output unit from whose output it goes to input of AND gate whose other input receives signal from unit identifying signals with saved code intervals. Frequency division of code pulses is effected by narrowband filers; then these signals are passed through additional intermediate-frequency amplifiers, detected by means of additional detectors, and applied to input of signal identification unit through additional output units. EFFECT: enhanced noise immunity and reliability of data reception in echo signal environment. 1 cl, 2 dwg