Patent ID: 6894638

Claim:
A radar signal processing unit, comprising: a Fourier transform section configured to execute a Fourier transform of a received signal to a frequency signal, a frequency domain power calculation section configured to calculate a power spectrum of electric power for each frequency from the frequency signal, an abnormal echo removal section configured to determine the presence of an abnormal echo based on a power value of the power spectrum, and to output only a power spectrum not corresponding to the abnormal echo, said abnormal echo removal section also configured to perform processing in accordance with a first range loop, an incoherent processing section configured to perform an incoherent integration of the power spectrum not corresponding to the abnormal echo and averaging, said incoherent processing section configured to perform said incoherent integration in accordance with a second range loop, and a signal detection section configured to calculate an atmospheric physical quantity from the incoherent-integrated power spectrum.