A Dimensionality Reduction Method for Clutter Suppression Based on Eigenbeam Adaptive Beam Domain FSA
An adaptive beam and clutter suppression technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large amount of computation, high requirements for training samples, and increased system dimension, so as to reduce the dimension of the processor and reduce the number of training samples. The effect of reducing the number and reducing the dimension of the system
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Embodiment 1
[0056] See figure 1 , figure 1 It is a schematic flowchart of a clutter suppression and dimensionality reduction method based on eigenbeam adaptive beam domain FSA provided by an embodiment of the present invention, including:
[0057] Step 1: Get the FSA data vector;
[0058] First, perform A / D sampling on N space equivalent array elements of the radar to obtain K+2 pulse echo data in one CPI; wherein, the K+2 pulse echo data include echoes of L samples information;
[0059] Then in each space equivalent array element, the K+2 pulse data is processed three times in the time domain sliding window, and three sets of data consisting of the 1st~K, 2~K+1 and 3~K+2 pulses are respectively obtained;
[0060] Finally, carry out K-point DFT on the three sets of data and transfer them to the Doppler domain to obtain the FSA data vector; wherein, for the same Doppler channel, the three sets of data respectively transform L of the N spatially equivalent array elements into the Doppler...
Embodiment 2
[0104] The effects of the present invention will be further described below in conjunction with simulation experiments.
[0105] 1. Simulation conditions
[0106] The airborne multi-channel radar in the experimental simulation of the present invention adopts the one-shot-multiple-receive mode, works in the front side view, the angle between the beam center and the array antenna plane is 90 degrees, and there are 10 equivalent array elements to receive, and the array element spacing is 0.123 meters, the number of pulses accumulated in one CPI is 200, the pulse repetition frequency is 3000 Hz, the working wavelength is 0.246 meters, the shortest detection distance of the radar is 7 kilometers, the distance resolution is 20 meters, the number of samples is 600, the platform flight The altitude is 6 kilometers, the speed is 100 meters per second, the target is located in the center of the beam, and the radial speed is 53 meters per second.
[0107] 2. Simulation content and resul...
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