Patent ID: 8379776
Filing Date: 2013-02-19
Classification: H04L

Abstract:
1. An OFDM communication device, comprising: a reception unit for receiving a series of symbols that contain a known signal portion; a correlation calculation unit for calculating a correlation between the series of symbols received by the reception unit and a held signal that has a waveform identical to a waveform of the known signal; a desired signal power acquisition unit for acquiring a desired signal power based on a calculation result from the correlation calculation unit; a background noise power acquisition unit for acquiring a background noise power that indicates a difference amount between a reception power of each of the series of symbols and the desired signal power acquired by the desired signal power acquisition unit; a guard interval length determination unit for determining a guard interval length in accordance with the background noise power acquired by the background noise power acquisition unit; and a guard interval length instruction unit for instructing a transmitter to transmit the series of symbols with the guard interval length determined by the guard interval length determination unit.