Patent ID: 8552907
Filing Date: 2013-10-08
Classification: G01S

Abstract:
1. An electronic scanning radar apparatus, which is mounted on a moving body, comprising: a receiving unit configured to include a plurality of antennas receiving a receiving wave coming from a target, the target reflecting a transmission wave having been transmitted; a beat signal generation unit configured to generate beat signals in response to the transmission wave and the receiving wave; a frequency resolution processing unit configured to resolve the beat signals into beat frequencies having a predetermined frequency band width, the frequency resolution processing unit calculating a complex number data based on the beat signals resolved for each of the beat frequencies; a target detecting unit configured to detect a peak value from intensity values of the beat frequencies so that the target detecting unit detects an existence of the target; a memory unit configured to store a data generation unit, the data generation unit being generated in a present detecting cycle that is performed in a present time and used in a next detecting cycle that is performed after the present detecting cycle, the present and next detecting cycles being repeatedly performed to calculate an incoming direction of the receiving wave; a target link unit configured to make association between a target detected in the present detecting cycle and the target detected in the past detecting cycle that is performed before the present detecting cycle and store the data generation unit associated with the target into the memory; and a direction estimating unit configured to generate a generative complex number data to correspond to the data generation unit, the generative complex number data being generated based on a complex number data calculated from the beat frequencies, the direction estimating unit calculating, for each antenna, an incoming direction of the receiving wave based on each normal equation formed by use of the generative complex number data, the generative complex number data being formed to correspond to the complex number data of a detected beat frequency that is the beat frequency which an existence of the target has been detected and the data generation unit, wherein the direction estimating unit performs an averaging process for at least part of elements that form the normal equation.