Patent ID: 8155245
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A modulation scheme estimation apparatus comprising: a receiving unit configured to receive a first signal; a generation unit configured to generate a plurality of first phase amounts; an acquisition unit configured to acquire a plurality of multiplication signals by multiplying the first signal by each of the first phase amounts; an extraction unit configured to extract a plurality of second signals corresponding to respective direct-current components of third signals obtained by subjecting the multiplication signals to Fourier transform; a first computation unit configured to compute a plurality of sums, each of which is a sum of each of the multiplication signals and a corresponding one of the second signals; a second computation unit configured to compute a plurality of absolute values of the sums; and a first identifying unit configured to identify a modulation scheme corresponding to one of the absolute values which has a highest similarity with respect to reference values associated with modulation schemes.