Patent ID: 9031154
Filing Date: 2015-05-12
Classification: H04L

Abstract:
1. An OFDM modulator comprising: a first circuit that acquires a plurality of complex data each of which is assigned to a dedicated subcarrier, and generates waveform data on the basis of said acquired plurality of complex data; a second circuit that acquires said waveform data generated by said first circuit, and shifts frequency of said waveform data; a third circuit that converts an acquired bit sequence into a plurality of multi-value symbol data, and assigns said dedicated subcarrier to each of said plurality of multi-value symbol data; and a fourth circuit that selects a portion of said plurality of multi-value symbol data acquired from said third circuit, shifts frequency of the subcarrier assigned to said selected multi-value symbol data, and outputs said frequency shifted multi-value symbol data, wherein said first circuit acquires each of said multi-value symbol data outputted from said fourth circuit as the complex data, and generates the waveform data on the basis of said multi-value symbol data from said fourth circuit, and wherein said second circuit shifts frequency of said waveform data toward a direction opposite to the shift in said fourth circuit by the amount of the frequency shifted by said fourth circuit.