Signal detection device and signal detection method

摘要

In this signal detection device (100), a delaying unit (101) delays a first distributed signal or a second distributed signal distributed from a received signal for a period of time of T1 to form a first multiplication signal, and delays the one for a period of time of T2 (T2>T1) to form a second multiplication signal. An integrator (104) calculates a first correlation value by integrating the result of multiplying the first distributed signal and the first multiplication signal. An integrator (105) calculates a second correlation value by integrating the result of multiplying the second distributed signal and the second multiplication signal. An evaluation unit (108) evaluates whether the signal to be detected, which is a periodic signal with a period of T1 or a periodic signal with a period of T2, exists or not, on the basis of the first correlation value and the second correlation value.

主权项

1. A signal detection apparatus, comprising:
a first multiplier that multiplies a first distributed signal provided by distribution of a received signal, by a first multiplication signal; a first integrator that integrates a result of the multiplication obtained in the first multiplier, in an integration period, and thereby calculates a first correlation value; a second multiplier that multiplies a second distributed signal provided by the distribution of the received signal, by a second multiplication signal; a second integrator that integrates a result of the multiplication obtained in the second multiplier, in the integration period, and thereby calculates a second correlation value; a delay section that delays the first distributed signal or the second distributed signal for time T1 to form the first multiplication signal, and delays the first distributed signal or the second distributed signal for time T2 (T2>T1) to form the second multiplication signal; and a determination section that determines presence or absence of signals to be detected, respectively, based on a relative value between the first correlation value and the second correlation value, the signals to be detected being a periodic signal with a period T1 and a periodic signal with a period T2.