To increase a decoding rate in a secondary monitoring radar or the like.
Pulse modulation waves transmitted from ATC transponders #1T, #2T are detected by a detector circuit 3. The phase of the pulse modulated waves is detected, and a switching control signal corresponding to the detected phase is supplied to a discriminating circuit 5. The discriminating circuit 5 discriminates the detected pulse of the pulse modulated waves individually by the switching control signal corresponding to the phase of the pulse modulated waves and supplies it to decoder circuits 41, 42, thereby allowing to receive and decode the pulse modulated waves from the ATC transponders #1T, #2T, even when they are received as pulse trains, with discriminated according to the signal corresponding to each transmitting source.
KUJI YOSHINORI
| JPH09171074A | 1997-06-30 | |||
| JP2004108798A | 2004-04-08 |
Iwa Saki Kokuni
Kawamata Sumio
Nakamura Tomoyuki
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu