Patent ID: 11950585
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC A  G | IPC A  G

Claim 13:
14. A system comprising:
a base station;
a transmitter configured to output a modulated signal that is modulated with data for a designated device, wherein the modulated signal is distributed to the base station and to a wireless channel to cause a wireless transmission of the data to the designated device, and the modulated signal uses a plurality of sub-carrier frequencies;
the base station being configured to:
receive the modulated signal as a loopback signal;
receive a reflected signal of the modulated signal, wherein the reflected signal is a reflection of the modulated signal from at least one object different from the designated device, and the reflected signal includes a plurality of symbols corresponding to the plurality of sub-carrier frequencies;
perform element-wise division on the plurality of symbols of the reflected signal by corresponding symbols of the loopback signal; and
estimate a distance to the at least one object based on a frequency response resulting from the element-wise division.