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| Low Sidelobe Transmit Pattern Design for MIMO Radar |
| Luo Tao① Guan Yong-feng② Liu Hong-wei① Jiu Bo① Wu Meng① |
①(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)
②(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China) |
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Abstract Low sidelobe transmit pattern of MIMO radar can concentrate majority energy in the mainlobe region to improve the target detection, and reduce the energy of clutter and false targets from sidelobe, so as to enhance the SNR of echo. Based on a modified non-diagonal elements of transmit signal covariance matrix, a low sidelobe transmit pattern optimization algorithm for MIMO radar is proposed. Firstly, the pattern matching design method is implemented to obtain the desired mainlobe shape of transmit pattern, with the results as the initial value. Secondly, the cost function can be formulated as the minimization of peak-sidelobe or integrated-sideloble; the mainlobe shape distortion can be constrained by the Frobenius norm of modification matrix, and the modified transmit signal covariance matrix needs to be positive semi-definite. Since the two optimization problems are convex, the global optima can be acquired. The simulation results show that the desired mainlobe shape and low sidelobe pattern can be obtaibed with the proposed method.
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Received: 15 March 2013
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Corresponding Authors:
Jiu Bo
E-mail: bojiu@mail.xidian.edu.cn
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2013, Vol. 35 
