Patent ID: 7907083
Filing Date: 2011-03-15
Classification: G01S

Abstract:
1. A radar device capable of determining an azimuth of a target object based on received signals corresponding to reflected radar waves reflected by the target object, comprising: transmitting and receiving means configured to transmit radar waves, and then receive reflected radar waves reflected by the target object through an array antenna composed of antenna elements, and generate and transfer received signals corresponding to the reflected radar waves; data collecting means configured to repeatedly perform: auto-correlation matrix generating means configured to generate an auto-correlation matrix based on each unit data; section average correlation matrix generating means configured to execute a process of calculating an average in time of a predetermined number of the auto-correlation matrix of each unit data generated by the auto-correlation matrix generating means, and generate a section average correlation matrix as an auto-correlation matrix after the time average process; target azimuth calculating means configured to calculate an azimuth of the target object based on the section average correlation matrices generated by the section average correlation matrix generating means; mixed noise amount estimating means configured to estimate an amount of noise mixed in each unit data; and coefficient determining means configured to determine a weighting coefficient to be applied to each of the predetermined number of the auto-correlation matrices, which is a target of calculating the average performed by the section average correlation matrix generating means, based on the amount of noise mixed in the unit data estimated by the mixed noise amount estimating means, wherein the section average correlation matrix generating means applies the weighting coefficients determined by the coefficient determining means to each of the predetermined number of the auto-correlation matrices, and generates an auto-correlation matrix by performing the weighting average of the predetermined number of the auto-correlation matrices using the weighting coefficients obtained by the coefficient determining means.