| 摘要 |
PROBLEM TO BE SOLVED: To discriminate radio communication equipment which is not an object for communication when reception is performed by switching a plurality of antennas. SOLUTION: When response packets are received from all the pieces of radio communication equipment of communication objects, a correlation value to be calculated from spreading codes of the received response packets and predetermined spreading codes is calculated and the lowest value (minimum value) is calculated in the calculated correlation value (S13 and S14). A value having a predetermined margin in consideration of a deteriorated portion of a radio signal by multipath fading, etc. which is preliminarily and experimentally calculated is set in the lowest value of the obtained correlation value as the threshold of the correlation value. COPYRIGHT: (C)2007,JPO&INPIT
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