Bistatic MIMO radar dynamic tracking method based on cultural modem cluster searching mechanism

A dynamic tracking and bistatic technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measurement devices, etc., can solve problems such as poor performance and low signal-to-noise ratio of subspace decomposition algorithms

Active Publication Date: 2015-06-17
HARBIN ENG UNIV
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Problems solved by technology

[0003] After searching the existing technical literature, it was found that LiCaicai et al. studied the single-base (including transmitting and receiving simultaneous Direction of Arrival (DOA) estimation of coherent targets in MIMO radar based on array elements, different array elements (transmitter and receiver)——To obtain the DOA by constructing rotation invariance in Gaussian noise environment and Gaussian colored noise environment, but the subspace decomposition algorithm has a signal-to-noise ratio Disadvantages of poor performance in the case of low data and small snapshot data

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  • Bistatic MIMO radar dynamic tracking method based on cultural modem cluster searching mechanism
  • Bistatic MIMO radar dynamic tracking method based on cultural modem cluster searching mechanism
  • Bistatic MIMO radar dynamic tracking method based on cultural modem cluster searching mechanism

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[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] In the experiment, the array element spacing of the receiving end and the transmitting end are both half wavelength, the number of array elements M=6N=6, the baseband signal transmitted by the transmitting end is a Hadamard coded BPSK signal, the Hadamard code length of the baseband signal is 64, and the carrier frequency is 10GHz. The repetition frequency of the transmitted signal is 10KHz, the RCS of the radar cross section is taken as 1, and the Doppler frequency is taken as 2KHz. The hereditary factor of the signal covariance update equation is μ=0.7, and the selection rate η=0.2. In the cultural cat group search mechanism, the number of cats in the cat group is 20, and the number of iterations is 200. For each cat, the speed limit in each dimension is 0.1 times the boundary difference of the definition domain of the search angle interval, and the number of ...

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Abstract

The invention belongs to the field of antenna communication and particularly relates to a bistatic MIMO radar dynamic tracking method based on a cultural modem cluster searching mechanism. The bistatic MIMO radar dynamic tracking method comprises the steps of conducting snapshot group sampling and matched filtering on P spatial target signals, conducting position initialization on each modem of the cultural modem cluster searching mechanism, calculating a fitness function value of the position (shown in the description) of the ith modem, randomly selecting MR*D modems to execute a tracking mode, judging whether a maximum iteration number is achieved or not, receiving new data, estimating the departure directions and arrival directions of the targets according to the kth snapshot group data through output situational knowledge h (k) representatives if tracking is stopped, and making an MIMO radar dynamic target tracking curve. The accuracy and robustness of the method are improved, finally the problem of dynamic tracking of bistatic MIMO radar coherent targets is solved, and the performance is still good under the condition of low signal t0 noise ratio.

Description

technical field [0001] The invention belongs to the field of antenna communication, and in particular relates to a dynamic tracking method for a bistatic MIMO radar based on a cultural cat group search mechanism. Background technique [0002] MIMO (Multiple-Input Multiple-Output) radar is a new radar system, which is developed by referring to the multiple-input multiple-output technology in the communication field, and has many advantages compared with previous radars. According to the configuration of its antenna, it can be divided into: statistical MIMO radar and dual (single) base MIMO radar. The array element spacing of the statistical MIMO radar satisfies the space diversity condition, and the radar's detection performance is improved by merging the echo signals from different observation angles to suppress the RCS scintillation of the target. The dual (single) base MIMO radar adopts the form of dense array. By transmitting multi-channel orthogonal signals and then per...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66
CPCG01S13/003G01S13/726
Inventor 高洪元徐从强杜亚男阮嘉恒陈梦涵李晨琬尹诗琦
Owner HARBIN ENG UNIV
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