Waveform covariance matrix design for robust signal-dependent interference suppression in colocated MIMO radars
In multiple-input multiple-output (MIMO) radars, interference can be properly suppressed by designing transmit waveforms. However, having an error in initial estimation of interferers’ locations can result in degradation of signal-to-interference-plus-noise ratio (SINR), significantly. In this paper...
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| Published in | Signal processing Vol. 152; pp. 311 - 319 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.11.2018
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| Online Access | Get full text |
| ISSN | 0165-1684 1872-7557 |
| DOI | 10.1016/j.sigpro.2018.06.007 |
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| Abstract | In multiple-input multiple-output (MIMO) radars, interference can be properly suppressed by designing transmit waveforms. However, having an error in initial estimation of interferers’ locations can result in degradation of signal-to-interference-plus-noise ratio (SINR), significantly. In this paper we consider the problem of robust interference suppression and SINR increment in collocated MIMO radars, in the presence of signal-dependent interference resources. We propose an efficient method to generate transmit waveform covariance matrix with the following properties: (a) robustness in interference suppression, (b) high SINR at the receiver, c) using the same power level for all transmit antennas and (d) suitable for generating BPSK waveforms in a closed-form. We solve the resulted optimization problems with numerical approaches in a short period of time. The proposed covariance matrix, by exploiting the correlated MIMO radar concept and a technique we use in the transmitter, yields to a better SINR level compared to conventional MIMO radars, phased array method and the recent introduced schemes. Simulation results validate our claims and show the advantages of our work . |
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| AbstractList | In multiple-input multiple-output (MIMO) radars, interference can be properly suppressed by designing transmit waveforms. However, having an error in initial estimation of interferers’ locations can result in degradation of signal-to-interference-plus-noise ratio (SINR), significantly. In this paper we consider the problem of robust interference suppression and SINR increment in collocated MIMO radars, in the presence of signal-dependent interference resources. We propose an efficient method to generate transmit waveform covariance matrix with the following properties: (a) robustness in interference suppression, (b) high SINR at the receiver, c) using the same power level for all transmit antennas and (d) suitable for generating BPSK waveforms in a closed-form. We solve the resulted optimization problems with numerical approaches in a short period of time. The proposed covariance matrix, by exploiting the correlated MIMO radar concept and a technique we use in the transmitter, yields to a better SINR level compared to conventional MIMO radars, phased array method and the recent introduced schemes. Simulation results validate our claims and show the advantages of our work . |
| Author | Ghorashi, Seyed Ali Bolhasani, Mostafa Mehrshahi, Esfandiar |
| Author_xml | – sequence: 1 givenname: Mostafa surname: Bolhasani fullname: Bolhasani, Mostafa email: m_bolhasani@sbu.ac.ir organization: Cognitive Telecommunication Research Group, Department of Telecommunications, Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran – sequence: 2 givenname: Esfandiar surname: Mehrshahi fullname: Mehrshahi, Esfandiar email: mehr@sbu.ac.ir organization: Cognitive Telecommunication Research Group, Department of Telecommunications, Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran – sequence: 3 givenname: Seyed Ali orcidid: 0000-0002-2910-9208 surname: Ghorashi fullname: Ghorashi, Seyed Ali email: a_ghorashi@sbu.ac.ir organization: Cognitive Telecommunication Research Group, Department of Telecommunications, Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran |
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| Snippet | In multiple-input multiple-output (MIMO) radars, interference can be properly suppressed by designing transmit waveforms. However, having an error in initial... |
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| SubjectTerms | Convex optimization Covariance matrix design Interference suppression Multiple-input multiple-output (MIMO) radar |
| Title | Waveform covariance matrix design for robust signal-dependent interference suppression in colocated MIMO radars |
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