Patent ID: 11879970
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 13:
14. A signal processing method using a weather parameter found based on a reception signal of a reflected wave of a pulsed transmission wave repeatedly transmitted into a space, a Doppler spectrum derived from the reception signal, and a topographic-echo-removed spectrum resulting from removal of a topographic echo from the Doppler spectrum, the signal processing method comprising:
distinguishing an echo by finding a first weather echo region based on a weather parameter among weather parameters that is different in behavior between a weather echo and the topographic echo;
determining an echo region by finding a second weather echo region based on a weather parameter among the weather parameters a behavior of which is not dependent on a Doppler velocity; and
reconstructing a weather echo region by determining as a weather echo region, a combined region of the first weather echo region and the second weather echo region,
wherein distinguishing the echo includes using among the weather parameters, a signal strength difference between the Doppler spectrum and the topographic-echo-removed spectrum and at least one of signal strength, a spectral width, variability in phase, variability in signal strength, variability in spectral width, variability in radar reflective factor difference, and variability in phase difference between polarized waves.