| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily achieve an autonomy distributed type communication system with multiple connection using a communication apparatus with a simple configuration. <P>SOLUTION: A synchronous signal producing unit 110 is configured by an OFDM reception unit 110A for receiving an OFDM signal of a public broadcasting, and a GI detection unit 110B for detecting a guard interval to be included in the OFDM signal. The OFDM reception unit 110A in a preceding stage is configured by an OFDM reception antenna 111 and a bandpass filter 112. On the other hand, the GI detection unit 110B in a latter stage is configured by a delay element 113 for making the received OFDM signal to be delayed by one effective symbol length, a complex correlation calculating unit 114, a low pass filter 115, and a determining unit 116. The complex correlation calculating unit 114 is designed to calculate complex correlation between an OFDM signal to be directly outputted from the band pass filter 112 and an OFDM signal to be acquired from the delay element 113. <P>COPYRIGHT: (C)2008,JPO&INPIT |
