| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a signal detection device and a signal detection method which make it possible to maintain the accuracy of signal detection even when a power level fluctuates greatly. <P>SOLUTION: In a signal detection device 100, a multiplier 102 multiplies a first distribution signal having a received signal distributed thereto and a first multiplication signal together, and an integrator 104 integrates, by an integration period, the multiplication result obtained by the multiplier 102 to calculate a first correlation value. A multiplier 103 multiplies a second distribution signal having a received signal distributed thereto and a second multiplication signal together, and an integrator 105 integrates, by an integration period, the multiplication result obtained by the multiplier 103 to calculate a second correlation value. A delay unit 101 delays the first or the second distribution signal by time T1 to create the first multiplication signal and delays the same by time T2 (T2>T1) to create the second distribution signal. A determination unit 108 determines, based on the first and the second correlation values, whether there exists a signal to be detected which is a periodic signal in cycle T1 or a periodic signal in cycle T2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
