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

Claim 8:
9. The radio wave feature value computation method according to claim 7, wherein
the fixed signal includes a single signal pattern that is repeated a plurality of times in the information-1 section and a single signal pattern that is repeated a plurality of times in the information-2 section,
the information-1 section signal processing includes:
clipping two cycles of a first information-1 section and a second information-1 section from a single signal pattern that is repeated a plurality of times in the information-1 section;
performing Fourier transform on a signal of the first information-1 section and performing Fourier transform on a signal of the second information-1 section; and
computing, for each frequency bin, an average between the Fourier-transformed first information-1 section and the Fourier-transformed second information-1 section,

the information-2 section signal processing includes:
clipping two cycles of a first information-2 section and a second information-2 section from a single signal pattern that is repeated a plurality of times in the information-2 section;
performing Fourier transform on a signal of the first information-2 section and performing Fourier transform on a signal of the second information-2 section; and
computing, for each frequency bin, an average between the Fourier-transformed first information-2 section and the Fourier-transformed second information-2 section, and

a signal length of the first information-1 section, a signal length of the second information-1 section, a signal length of the first information-2 section, and a signal length of the second information-2 section are equal to one another.