Radio tag for LFM radar

摘要: An RFID system using encoded digital information utilizing pulsed linear frequency modulation (LFM). The LFM waveform is sent from an24 aircraft or satellite and received by a transponder. demodulated both, an AM FM receiver. data compared to preprogrammed criteria tables, after validation decoded utilized. Algorithms in the transponder are used determine deviation for calculating direction of slope input signal. valid RF signal stored delay element, with phase (PM), (FM). tag transmission synchronized waveform. transmit/receive chopping prevents unwanted oscillations capable randomization.