A Trace Clustering Method for Radar Target Trace Cohesion

Abstract

The invention discloses a trace point clustering method for clustering trace points of radar targets, and belongs to the field of radar signal processing. The trace point clustering method for clustering the trace points of the radar targets can be used for detecting and recording targets of low-resolution pulse search radars. By using the trace point clustering method for clustering the trace points of the radar targets, a radar detecting video is operated, morphological characteristics of echoes of the radar targets are sufficiently considered, the trace points serve as basic units, a basic principle that 'if a trace point belongs to a known target, another trace point in the next adjacent direction also belongs to the known target, and the distance between the trace point and the known target is equal to the distance between the other trace point in the next adjacent direction and the known target' is followed, a series of phenomena that new targets occur, trace points of the same target are broken, and the shapes of echoes are special are avoided according to distribution of the trace points on the periphery of a testing point, and whether the testing point belongs to a known target or not is judged. By using the trace point clustering method for clustering the trace points of the radar targets, the algorithm complexity is reduced during traditional trace point clustering, echoes of the two targets which are adhered to each other are distinguished into two trace points, the processing speed is increased, and the processing precision is improved.

Description

technical field

[0001] The invention relates to the field of radar signal processing, in particular to a trace clustering method for low-resolution pulse search radar trace agglomeration. Background technique

[0002] Radar raw video signals are divided into two dimensions: azimuth and distance. When a low-resolution pulse search radar sweeps over a target, the antenna will pick up a train of echoes. A typical target echo such as figure 1 As shown, there is a certain broadening in the azimuth and a certain extension in the distance. Quantize and sample the original radar video signal for detection. The signal units that are greater than the detection threshold are called dot traces, and the signal units that are less than the detection threshold and cleared are called empty points. The detected radar video signal is called detection video. In theory, the detection video removes noise and interference, and only retains the trace of the target. But in practice there may s...

Examples

Embodiment

[0049] Such as Figure 5 As shown, this embodiment takes a detection video of R×W size as an example for processing. In addition to target traces and empty points, there may also be useless isolated points. During processing, the detection video A(i, j) is read in direction by direction and distance by distance, and it is positioned as a test point. The specific implementation steps are:

[0050] For the read-in test point A(i, j), first judge whether it is a trace or an empty point.

[0051] If the current test point A(i,j) is an empty point, it may be a break caused by detection, such as Image 6As shown, the empty box is an empty dot, and the backslash box is a dot. If not, the same target may be treated as two targets. To deal with this situation: search A(i,j-1), A(i,j-2)...A(i,j-L) point by point along the current orientation i to see if there are dot traces. If there is no point trace, A(i, j) is not a target break due to detection, but a continuous empty point, an...

technical field

[0001] The invention relates to the field of radar signal processing, in particular to a trace clustering method for low-resolution pulse search radar trace agglomeration. Background technique

[0002] Radar raw video signals are divided into two dimensions: azimuth and distance. When a low-resolution pulse search radar sweeps over a target, the antenna will pick up a train of echoes. A typical target echo such as figure 1 As shown, there is a certain broadening in the azimuth and a certain extension in the distance. Quantize and sample the original radar video signal for detection. The signal units that are greater than the detection threshold are called dot traces, and the signal units that are less than the detection threshold and cleared are called empty points. The detected radar video signal is called detection video. In theory, the detection video removes noise and interference, and only retains the trace of the target. But in practice there may s...

Examples

Embodiment

[0049] Such as Figure 5 As shown, this embodiment takes a detection video of R×W size as an example for processing. In addition to target traces and empty points, there may also be useless isolated points. During processing, the detection video A(i, j) is read in direction by direction and distance by distance, and it is positioned as a test point. The specific implementation steps are:

[0050] For the read-in test point A(i, j), first judge whether it is a trace or an empty point.

[0051] If the current test point A(i,j) is an empty point, it may be a break caused by detection, such as Image 6As shown, the empty box is an empty dot, and the backslash box is a dot. If not, the same target may be treated as two targets. To deal with this situation: search A(i,j-1), A(i,j-2)...A(i,j-L) point by point along the current orientation i to see if there are dot traces. If there is no point trace, A(i, j) is not a target break due to detection, but a continuous empty point, an...

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