Method and device for suppressing false targets of external radiation source radar based on secondary peak identification
An external radiation source radar and false target technology, which is applied in the field of external radiation source radar false target suppression based on subpeak identification, can solve the problems of large amount of calculation and not suitable for real-time system work
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Embodiment 1
[0059] In this embodiment, the receiving antenna is composed of a Yagi antenna and a 12-element circular array. The Yagi antenna serves as a reference antenna, pointing towards the FM broadcast transmitter. The 12-element circular array is used as a monitoring antenna, which scans the space through a digital beamforming algorithm to monitor the target area. The reference signal received by the Yagi antenna and the monitoring signal received by the circular array are preprocessed by digital down-conversion and clutter suppression. When the array beam points to a certain direction, the mutual ambiguity function is calculated to obtain the range-Doppler spectrum in this direction.
[0060] like figure 1 shown. A kind of external radiation source radar false target suppression method based on secondary peak identification of the present invention mainly consists of the following steps:
[0061] Step 1, the array beam points to the initial direction, pointing to 0° in this embo...
Embodiment 2
[0091] This embodiment is a device embodiment, which belongs to the same technical concept as Embodiment 1. For the content not described in detail in Device Embodiment 2, please refer to Method Embodiment 1.
[0092] like Figure 7 As shown, a kind of external radiation source radar false target suppression device based on secondary peak identification of the present invention comprises:
[0093] The initialization unit is used to point the array beam to the initial direction, and initialize the suspected target point set X and the secondary peak point set S;
[0094] The range Doppler spectrum acquisition unit is used to calculate the mutual ambiguity function of the reference signal and the clutter-suppressed monitoring signal to obtain the range Doppler spectrum in this direction, apply the constant false alarm detector to obtain the target point set Y, and update the suspected Target point set X={X i |X i ∈X∪Y, i=1,2,...};
[0095] The first processing unit is used to...
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