Transmitter polarization optimization with polarimetric MIMO radar for mainlobe interference suppression |
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| Affiliation: | 1. Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211, PR China;2. School of Electronic Informatin Engineering, Tianjin University, Tianjin 300072, PR China;3. Department of Electrical and Computer Engineering, Concordia University, Montreal, QC H3G 1M8, Canada;4. Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, UK;5. Key Laboratory of Electronic Information Countermeasure and Simulation Technology, Ministry of Education, Xidian University, Xian 710071, Shanxi, PR China;1. Nanjing Research Institute of Electronic Technology, Nanjing 210039, PR China;2. Key Laboratory of Intellisense Technology, CETC, Nanjing 210039, PR China;3. Jiangsu Second Normal University, Nanjing 210013, PR China |
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| Abstract: | Polarization diverse design of the transmit waveforms based on the property of the target scattering matrix provides better performance than transmitting waveforms with fixed polarizations, especially for mainlobe interference suppression applications. In this work, we propose a radar system combines the advantages of multiple-input–multiple-output (MIMO) systems with the advantages offered by optimally choosing the transmitter polarizations, in order to achieve a better mainlobe interference suppression performance. The polarization diversity is employed in the transmit array, while the receive array adopts 2-D vector sensors to measure the horizontal and vertical components of the received signal. The optimal transmitter polarizations can be obtained by maximizing the output signal-to-interference-plus-noise ratio (SINR) in each coherent processing interval (CPI). In addition, the discrimination method for the target and the interference is studied in this paper, along with the target scattering matrix estimation method. Simulation results demonstrate that interference can be effectively discriminated and suppressed with the radar configuration, and better interference suppression performance is achieved with the optimal transmitter polarizations. |
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| Keywords: | Mainlobe interference MIMO radar Polarization diversity Suppression Discrimination Optimal transmitter polarizations |
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