| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To judge a positive or negative of a Doppler frequency or a positive or negative of a target angle even when a real number signal is obtained as a reception signal. <P>SOLUTION: This radar device includes: an oscillator 1; a transmission element 3 for radiating a wave generated by the oscillator in a space; a distributor 2 for outputting a part of the wave generated by the oscillator as a local wave by extracting the part; reception elements 4a to 4d that are respectively placed on different positions to receive the wave and output reception waves; receiving devices 5a to 5d for detecting the respective reception waves by using the local wave to generate real number reception signals; a plurality of interchannel phase correcting sections 7a to 7d that respectively multiply phase correction coefficients, which are represented by complex numbers and different from each other by each receiving device, to the plurality of real number reception signals; a space frequency information generating section 9 that converts a reception signal chain obtained by collecting the reception signals after correcting the plurality of phases to a signal in a spatial frequency region; and a code selecting section 11 that selects a spatial frequency spectrum of which the amplitude is larger than the other when signals from two directions which are in symmetrically positive and negative degrees with respect to a direction in an angle of roughly 0 degree are detected. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
