| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a signal detection device capable of detecting feeble unauthorized radio waves. <P>SOLUTION: The signal detection device (1) includes a two distribution circuit (12) for distributing an incoming signal in two, a first and a second A/D conversion circuits (13 and 14) for carrying out analog/digital conversion for the signal distributed in two by the two distribution circuit (12), respectively, a conjugate circuit (15) for computing conjugate to the data analog/digital converted by the second A/D conversion circuit (14); and a multiplication circuit (16) for multiplying the data analog/digital converted in the first A/D conversion circuit (13) by the data computed conjugate in the conjugate circuit (15). Feeble radio waves can be detected based on the multiplication result of the multiplication circuit (16). <P>COPYRIGHT: (C)2010,JPO&INPIT |
