Patent ID: 11881970
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A radio wave emission source identification method including:
designating, within a fixed signal included in a baseband signal of a received communication wave, an information-1 section and an information-2 section that are two types of signal sections having different communication information and being present in shorter time than fading of the received communication wave changing with time;
performing Fourier transform on the information-1 section within the baseband signal;
performing Fourier transform on the information-2 section within the baseband signal;
computing a feature value, based on a signal of the Fourier-transformed information-1 section and a signal of the Fourier-transformed information-2 section; and
specifying an individual of an emission source of the received communication wave, based on the computed feature value.