Patent ID: 8165238
Filing Date: 2012-04-24
Classification: H04L

Abstract:
1. A bi-directional communication system that carries out bi-directional communication using OFDM signals, wherein each of two communication apparatuses comprise: a transmission unit configured to transmit an OFDM symbol having a predetermined guard interval length and a predetermined effective symbol length, to a partner communication apparatus as an OFDM signal, a reception unit configured to receive an OFDM signal that has been transmitted from the partner communication apparatus, a demodulation unit configured to carry out demodulation processing on the OFDM signal received by the reception unit in a period that does not include a symbol boundary of the received OFDM signal, and a setting unit configured to set a transmission timing of an OFDM signal by the transmission unit in at least one communication apparatus of the two communication apparatuses to a timing that precedes a symbol timing of the OFDM signal received by the reception unit by a predetermined time shorter than a round-trip transmission time of the OFDM signal in the bi-directional communication.