Mobile device for detecting object and operation method therefor

An object detection method performed by a movable device, the object detection method comprising:

• emitting, by the movable device, first radio frequency signals;
• receiving, by the movable device, second radio frequency signals reflected by an object, the second radio frequency signals being the first radio frequency signals reflected by the object;
• obtaining, by the movable device, N sample sequences by digitizing N radio frequency signals, N being a natural number greater than or equal to 2, from among the second radio frequency signals received by the movable device;
• obtaining, by the movable device, a matrix including the N sample sequences as a column, in an order in which the second radio frequency signals are received;
• obtaining, by the movable device, a resulting signal including samples of rows of the matrix;
• obtaining, by the movable device, an energy value from the resulting signal by summing the samples included in the resulting signal;
• and
• based on the energy value being greater than or equal to a threshold value, detecting, by the movable device, the object.

One or more non-transitory computer-readable storage media storing one or more computer programs including computer-executable instructions that, when executed by one or more processors of a movable device individually or collectively, cause the movable device to perform operations, the operations comprising:

• emitting, by the movable device, first radio frequency signals;
• receiving, by the movable device, second radio frequency signals reflected by an object, the second radio frequency signals being the first radio frequency signals reflected by the object;
• obtaining, by the movable device, N sample sequences by digitizing N radio frequency signals, N being a natural number greater than or equal to 2, from among the second radio frequency signals received by the movable device;
• obtaining, by the movable device, a matrix including the N sample sequences as a column, in an order in which the second radio frequency signals are received;
• obtaining, by the movable device, a resulting signal including samples of rows of the matrix;
• obtaining, by the movable device, an energy value from the resulting signal by summing the samples included in the resulting signal;
• and
• based on the energy value being greater than or equal to a threshold value, detecting, by the movable device, the object.