Apparatus and method for motion recognition based on pulse radar

A motion recognition apparatus comprising:

• at least one processor;
• and
• a memory electrically connected to the processor and configured to store at least one piece of code executed by the processor,
• wherein the memory stores code that causes the processor to:
• receive a plurality of frame signals based on radar pulses reflected from a target at different times,
• generate a plurality of micro-range enhanced frame signals obtained by reinforcing a component of a second region having more movement than movement of a first region among the plurality of frame signals,
• generate a micro-range enhanced frame set formed by stacking, along a time axis, the plurality of micro-range enhanced frame signals at preset time intervals,
• generate a micro-range enhanced radar image which is an image obtained by viewing the micro-range enhanced frame set in a direction perpendicular to the time axis and an index axis of the micro-range enhanced frame set, the index axis being an axis related to a distance to the target, and
• determine motion of the target by inputting the micro-range enhanced radar image to a machine learning-based learning model when executed through the processor.

A motion recognition apparatus comprising:

• at least one processor;
• and
• a memory electrically connected to the processor and configured to store at least one piece of code executed by the processor,
• wherein the memory stores code that causes the processor to:
• receive input of a radar image which is an image obtained by viewing a micro-range enhanced frame set in a direction perpendicular to a time axis and an index axis of the micro-range enhanced frame set, the index axis being an axis related to a distance to the target, and the micro-range enhanced frame set being formed by stacking, at preset time intervals, a plurality of frame signals along the time axis, based on radar pulses reflected from a target at different times,
• determine a micro-range within which a change in distance between at least a part of the target and a reception antenna is reflected due to movement of the part in the radar image,
• generate a micro-range enhanced radar image obtained by reinforcing components of the micro-range, and
• determine motion of the target by inputting the micro-range enhanced radar image to a machine learning-based learning model when executed through the processor.