| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve bidirectional communication having a high frequency use efficiency excluding occurrence of interference. <P>SOLUTION: Each of two communication apparatuses in a bidirectional communication system transmits an OFDM symbol having a predetermined guard interval length and a predetermined effective symbol length as an OFDM signal at a predetermined carrier frequency to a partner's communication system, receives the transmitted OFDM signal transmitted from the partner's communications device, and demodulates the received OFDM signal during a period not including a symbol boundary of the received OFDM signal. In at least either of these communication apparatuses, a transmission timing of the OFDM signal is controlled to precede by a predetermined time shorter than a total of transmission times of bidirectional OFDM signals in the bidirectional communication against the symbol timing of the received OFDM signal. <P>COPYRIGHT: (C)2010,JPO&INPIT |
