| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direction measurement device which can determine the location of each of a plurality of transmission sources (radios) even in an interference state in which the transmission sources exist at the same frequency. <P>SOLUTION: Interference wave direction measurement means (a direction finding device 10A) measures each direction of interference waves from a plurality of transmission sources (radios). Null pattern forming means (an array antenna control device 20) forms null patterns having directivity for the arrival directions of interference waves except one interference wave out of the interference waves from the plurality of transmission sources (radios), so as to suppress interference; and obtains an output signal with the interference suppressed. Transmission source identification means (a radio identification device 30) identifies each of the transmission sources (radios) on the basis of the output signal obtained by the null pattern forming means (the array antenna control device 20). <P>COPYRIGHT: (C)2013,JPO&INPIT |
