发明名称 RECEIVER
摘要 <P>PROBLEM TO BE SOLVED: To provide a technology by which precision of a signal received from a satellite is estimated early. <P>SOLUTION: An antenna 10 receives a signal transmitted from at least one satellite. In a frequency discriminating part 28, a local signal of which the frequency changes over a range of Doppler shift to be generated in a received signal is generated, the received signal is subjected to frequency conversion by a local signal, envelope detection of the signal subjected to frequency conversion is performed, and the signal subjected to the envelope detection is compared with a threshold. As a result of the comparison, a CPU 20 counts the number of signal components equal to or more than the threshold, thereby estimating the number of satellites being transmission sources of the received signals. <P>COPYRIGHT: (C)2012,JPO&INPIT
申请公布号 JP2011220854(A) 申请公布日期 2011.11.04
申请号 JP20100090710 申请日期 2010.04.09
申请人 KODEN ELECTRONICS CO LTD 发明人 KOBAYASHI KENICHI;OTAKI SATORU;IINO HIDEYUKI
分类号 G01S19/28;G01S19/26;G01S19/27;H03K5/00 主分类号 G01S19/28
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