| 摘要 |
PURPOSE:To acquire and detect a target continuously at a high data rate by receiving continuously even a received signal which deviates from the same transmission period. CONSTITUTION:The output of a receiving amplifier 4 which is supplied with a received signal is supplied to a difference frequency circuit 5 and a difference frequency circuit 6. The difference frequency circuit 6 finds and supplies continuously the difference fd between a transmission frequency and a reception frequency according to the frequency of the received signal received in a period deviating from the same period to a range output circuit 7. The range circuit 7 has BPFs 71-1-71-N-71-max forming a filter bank corresponding to the frequency count of the transmission frequency and outputs the difference frequency fd from one of those BPFs corresponding to its frequency.
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