| CPC G01S 13/04 (2013.01) [G01S 13/08 (2013.01); G01S 13/86 (2013.01)] | 20 Claims |
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1. A movable device for detecting an object, the movable device comprising:
a radio frequency (RF) signal transmitter configured to emit first radio frequency signals;
an RF signal receiver configured to receive second radio frequency signals reflected by an object, the second radio frequency signals being the first radio frequency signals reflected by the object;
memory storing one or more computer programs; and
one or more processors communicatively coupled to the RF transmitter, the RF receiver, and the memory,
wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the movable device to:
obtain 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 RF signal receiver,
obtain a matrix including the N sample sequences as a column in an order in which the N sample sequences are received,
obtain a resulting signal including samples of rows of the matrix,
obtain an energy value from the resulting signal by summing the samples included in the result signal, and
based on the energy value being greater than or equal to a threshold value, detect the object.
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