| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse radar device which can adjust a gain for a received signal with a simple structure, and which easily reduces its size and cost.SOLUTION: A pulse radar device 100 includes noise signal acquisition means 132a for acquiring a noise signal for monitoring (γ+δ) and gain change determination means 132b for detecting a gain change of a high frequency receiving section 120 by using the noise signal for monitoring (γ+δ) in a digital signal processing section 132. A change-over switch 136 is provided in a base band section 130 for suitably controlling a gain variable amplifier 135 when the gain change is detected by the gain change determination means 132b. A control section 133 outputs a control signal for switching the change-over switch 136 according to a control amount of the gain variable amplifier 135, which is inputted from the gain change determination means 132b. |
