| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect presence of an interference wave in a communication channel being utilized for communication. <P>SOLUTION: The spread spectrum communication device 10 for transmitting/receiving communication data modulated by spreading codes by communication radio wave comprises an RF-AGC circuit 205 for detecting the receiving signal level in a communication channel Cn transmitting/receiving a communication wave, an IF-AGC circuit 206 for detecting the signal level of an intermediate signal produced by converting a receiving signal to have an intermediate frequency, a correlation level detection circuit 211 outputting the correlation level between the intermediate signal and the spreading codes, and an interference wave detection circuit 207 for detecting presence of a communication wave in the communication channel and presence of an interference wave on the inside and outside of the communication channel based on the receiving signal level, the intermediate signal level and the correlation level. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
