| 摘要 |
PROBLEM TO BE SOLVED: To allow a phase at a front end of a waveform to use a random chirped pulse in a correlation detection device for detecting the correlation between the reflection signal from a target to a transmission signal with a chirped pulse in which one cycle is delayed and the chirped pulse. SOLUTION: A reference FM pulse generator 3 produces reference FM pulses (chirped pulses) to supply the pulses to a fixed delayed circuit 5 and a rectangular detection circuit 11. Transmission pulses output from the fixed delayed circuit are transmitted from a transmission antenna 7 to a target TG, and then are reflected by the target TG and received by a receiving antenna 9. As a result, received pulses are produced. The received pulses are rectangularly detected by the reference FM pulses in the rectangular detection circuit 11, and thereby the rectangular detection components x, y are obtained. When the timing between the reference FM pulses and the received pulses, the square root of the squared-sum of the correlation components X, Y which are obtained by integrating the rectangular detection components x, y with integrators 13, 15 corresponds to the amplitude a of the received pulse. COPYRIGHT: (C)2008,JPO&INPIT
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