| 摘要 |
The proposed device for suppressing passive interferences contains a receiver, a threshold unit, a moving-target indication unit, and for the purpose to enhance the level of interference suppression in detecting low-velocity and small targets, a number of channels for processing radar signals. Each signal processing channel contains a Doppler filter, a signal averaging unit, a delay line, a signal divider, a threshold unit with a control unit, and a switch. The input of the filter is connected to the output of the receiver, and the output is connected to the input of the signal averaging unit and the input of the delay line. The output of the signal averaging unit is connected to the first input of the divider. The output of the delay line is connected to the second input of the divider and the signal input of the switch. The output of the divider is connected to the input of the threshold unit. The output of the threshold unit is connected to the control input of the switch. The output of the switch is connected to the corresponding input of the moving-target indication unit. The output of the moving-target indication unit is used as the output of the proposed device.
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