METHOD FOR IMPROVING THE ACCURACY OF A BEAT FREQUENCY IN AN FMCW RADAR FOR DETECTING AND TRACKING A HIGH SPEED MOVING OBJECT

摘要

PURPOSE: A method for improving the accuracy of a beat frequency in an FMCW(Frequency Modulation Continuous Wave) radar is provided to improve the accuracy of distance and speed by improving the accuracy of the beat frequency of a high speed moving object.;CONSTITUTION: An RF receiver receives a reflected signal from a target. A data acquisition unit mixes the received signal and a reference waveform formed in a reference waveform generator. A signal processor predicts a beat frequency by Fourier transforming the acquired signal. The signal processor calculates distance and speed. A controller controls a modulation width and modulation time of a waveform generator by receiving speed information from the signal processor. The waveform generator generates a baseband waveform of an FMCW radar according to the command of the controller. An RF transmitter radiates the RF signal through a transmission antenna by receiving a transmission waveform of the waveform generator.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Speed information feedback; (BB) Controller; (CC) Transmission waveform controller; (DD) Reference waveform controller; (EE) Changing a modulation width according to speed; (FF) Waveform generator; (GG) Transmission waveform generator; (HH) Reference waveform generator; (II) RF transmitter; (JJ) Antenna; (KK) Signal processor; (LL) Data acquisition unit; (MM) RF receiver; (NN) Antenna