| 摘要 |
PROBLEM TO BE SOLVED: To obtain a bearing detecting apparatus by which a plurality of radio waves can be detected by a method wherein amplitude data on a received pulse is generated in every unit of an antenna scanning operation, the received pulse is classified in every equally divided identical direction, a measuring factor is extracted and the direction of arrived radio waves is found on the basis of the measuring factor. SOLUTION: Amplitude data in which a received video signal from a multistage fixed slicer 1 is quantized is recorded by a waveform memory 2 in every unit of the scanning operation of a rotating antenna, and every amplitude is encoded by an encoding circuit 3 before every unit of the scanning operation. A frequency measuring circuit 4 measures a frequency in every pulse inside the same direction section. A frequency discrimination circuit 5 sorts the amplitude data at every frequency, and it sets a maximum amplitude value in an amplitude register 6-1 to an amplitude register 6-n. On the basis of it, a rise inclination and a fall inclination are found by a rise detection circuit 7 and a fall detection circuit 8. Bearings at this time are recorded in a bearing register A9 and a bearing register B10. An additive average circuit 11 finds the additive average of both bearings, and the bearings are output from an output terminal 12 as a plurality of detected bearing data whose frequencies are different.
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