Detection method, detection device and storage medium

The embodiment of the invention provides a detection method, which comprises the following steps of: mixing a generated baseband signal with a local oscillator signal to generate a modulation signal; performing shunt processing on the modulation signal to at least obtain a transmitting signal and a receiving local oscillator signal, and transmitting the transmitting signal to a target area which can be radiated by a detection device; receiving an echo signal after the transmitting signal passes through a target object in the target area; and carrying out frequency mixing processing on the echo signal and the received local oscillator signal so as to calculate feature information of the target object at least based on a difference frequency signal obtained after the frequency mixing processing. Correspondingly, the embodiment of the invention also provides a detection device and a storage medium, coherent accumulation can be performed by using the coherence of signals, and the signals are effectively modulated