US Patent 11340281 Method of measuring electromagnetic signal and electronic device therefor

An electronic device and method related to measurement of an electromagnetic (EM) signal emitted from an external electronic device. The electronic device including a processor, a memory, and an EM sensor. The memory stores instructions, which, when executed, enable the processor to: obtain an input signal including an electromagnetic signal of an external electronic device and a self-noise using the EM sensor; identify an ambient condition of the electronic device; identify a compensation self-noise corresponding to the ambient condition; generate a signal pattern, based on the input signal and the compensation self-noise; and identify the external electronic device, based on at least a part of the signal pattern.