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

Claim 5:
6. A signal processing apparatus comprising:
a signal processor configured to
find a weather parameter 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;
find 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;
find 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;
determine a weather echo region based on the first weather echo region and the second weather echo region; and
provide the weather parameter in a range cell corresponding to the weather echo region determined by the signal processor to reconstruct the weather echo region,
wherein among the weather parameters, the signal processor is configured to use 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.