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Bistatic MIMO radar multi-target tracking method

A multi-target tracking and multi-input technology, which is applied in radar signal processing and communication fields, can solve the problems of inability to track target motion trajectory in real time and decrease estimation performance.

Active Publication Date: 2015-06-24
XIDIAN UNIV
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Problems solved by technology

Although this method uses the rotation invariance of the transmitting array and the receiving array to estimate the direction of wave departure and direction of arrival, which reduces the calculation time, it still has the disadvantage that after estimating the direction of wave departure and direction of arrival, the method still needs to Additional matching is required for them, and estimation performance degrades significantly when transforming the beam domain to very low dimensions
Although this method uses the non-circular signal characteristics to increase the virtual aperture of the MIMO radar and maximize the recognizable target, it still has the disadvantage that this method is a batch processing method for target location and needs to be processed in a Multiple transmit pulses are used for target positioning within the coherent processing time, and since this method assumes that the spatial position of the target does not change within a coherent processing time, or the target moves slightly, it can only be used for multiple target positioning. But it is impossible to track the trajectory of the target in real time

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with accompanying drawing:

[0061] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0062] Step 1, establish a signal model.

[0063] The embodiment of the present invention adopts bistatic multiple-input multiple-output radar system, referring to the appended figure 2 The array structure diagram of the bistatic MIMO radar system shown, the transmitting array and the receiving array are both uniform linear arrays, the numbers of array elements are M and N, and the intervals of array elements are d and c, respectively. figure 2 The asterisk in the middle indicates the location of the target, the wave-off direction of the target relative to the transmitting array is θ, and the direction of arrival relative to the receiving array is s(t)=[s 1 (t),...,s M (t)] T is the transmit signal vector at time t, y(t)=[y 1 (t),...,y N (t)] T is the received...

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Abstract

The invention discloses a bistatic MIMO radar multi-target tracking method which achieves the purpose of dynamically tracking multiple radar targets at the same time. The method comprises the steps that 1, a signal model is set up; 2, initialization is conducted; 3, matched filtering is conducted; 4, an array response matrix is updated; 5, the current positions of the targets are determined; 6 whether it is needed to continue tracking the targets or not is judged; 7, target tracking is completed. Compared with an existing bistatic MIMO radar tracking method, the bistatic MIMO radar multi-target tracking method can be used for target locating, achieves real-time dynamic target tracking and has the advantages that the calculation complexity is low and calculation time is short, and the method can be used for achieving real-time locating and tracking of multiple motion targets through a MIMO radar.

Description

technical field [0001] The invention relates to the technical field of communication, and further relates to a multi-target tracking method for a bistatic multi-input multi-output radar in the technical field of radar signal processing. The invention can be used to realize the real-time positioning and tracking of multiple moving targets in space by the multi-input multi-output radar. Background technique [0002] Multiple-input multiple-output radar uses multiple transmitting antennas to transmit mutually orthogonal signals at the transmitting end, and the receiving end uses antennas to receive target echo signals, and realizes transmit waveform diversity through matched filtering. Using waveform diversity, MIMO radar can form a larger virtual array aperture, increase the degree of freedom of the radar array, and thus increase the number of detectable targets. The target location of bistatic MIMO radar is mainly the joint estimation of wave departure direction and wave dir...

Claims

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Application Information

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IPC IPC(8): G01S13/66
CPCG01S13/66
Inventor 张伟涛袁晓光杨若男楼顺天
Owner XIDIAN UNIV
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