Signal processing device, sound wave system, and vehicle

Abstract

A signal processing device includes a wave-transmission signal generator configured to generate a wave-transmission signal for wave transmission of a sound wave, and to include a first chirp signal and a second chirp signal in the wave-transmission signal, a wave-reception signal output unit configured to output a wave-reception signal based on reception of a sound wave, and a derivation unit configured to derive a relative speed with respect to a target object based on a first timing, at which part of the wave-reception signal corresponding to the first chirp signal is detected, and a second timing, at which part of the wave-reception signal corresponding to the second chirp signal is detected. One of the first and second chirp signals has a frequency that increases with time, and the other of the first and second chirp signals has a frequency that decreases with time.

Dependencies are inferred from the claim text.