DETECTION APPARATUS, TERMINAL DEVICE, AND SIGNAL PROCESSING METHOD

A detection apparatus, a terminal device, and a signal processing method are provided, to resolve a problem in the conventional technology that missing detection of a target is caused when a distance resolution of a detection apparatus is improved. The detection apparatus, the terminal device, and the signal processing method may be applied to the fields such as autonomous driving, intelligent driving, assisted driving, or connected vehicles. The detection apparatus includes: a transmit module, configured to transmit a first signal group and a second signal group, where M first signals included in the first signal group and N second signals included in the second signal group are alternately distributed; and a receiving module, configured to receive a third signal group obtained after the first signal group is reflected by a target and a fourth signal group obtained after the second signal group is reflected by the target, where the third signal group and the fourth signal group are used to determine association information of the target. Distance-speed coupling causes missing detection of the target in one frequency step direction, and does not cause missing detection of the target in another frequency step direction. Therefore, missing detection of the target caused by the distance-speed coupling can be reduced or eliminated. In addition, the distance resolution of the detection apparatus can be improved by using a frequency step.