Pulse Compression Radar

摘要

A pulse compression radar for performing pre-distortion is provided, which has a configuration simplified in circuit structure. A radar apparatus (pulse compression radar) includes an antenna configured to externally transmit a transmission signal transmitted by a power amplifier and receive a reflection signal caused thereby as a reception signal. The radar apparatus includes a reception circuit configured to propagate this reception signal to a radar image creating module. The radar apparatus corrects beforehand, by utilizing the transmission signal (feedback signal) transmitted from the power amplifier, a transmission signal to be inputted into the power amplifier so as to cancel distortion of the transmission signal caused by amplification effect of the power amplifier. Further, a circuit where the reception signal passes and a circuit where the feedback signal passes share a part of each other.

主权项

1. A pulse compression radar, comprising:
an ideal transmission signal memory configured to store a transmission signal before distortion occurs therein; a transmission signal amplifying module configured to amplify the transmission signal inputted thereto and output the amplified transmission signal; an antenna configured to externally transmit the transmission signal outputted by the transmission signal amplifying module, and receive, as a reception signal, a reflection signal caused by the transmission signal; a reception circuit configured to propagate the reception signal received by the antenna; a signal processing module configured to obtain information regarding a target object based on the reception signal inputted thereto via the reception circuit; a signal feedback circuit configured to propagate, as a feedback signal, the transmission signal outputted by the transmission signal amplifying module, to the reception circuit; and a transmission signal correcting module configured to correct the transmission signal so as to cancel the distortion that is caused by the amplification, and output the corrected transmission signal to the transmission signal amplifying module, the transmission signal being corrected based on the transmission signal stored in the ideal transmission signal memory and the feedback signal.