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A New Iterative Approach in SINR Improvement of MIMO Radars by Using Combination of Orthogonal Waveforms

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Abstract

In this paper we consider joint waveform and filter design in multi-input multi-output (MIMO) radars in the presence of signal dependent interference to improve signal-to-interference-plus-noise ratio (SINR) of received signals. We have proposed two new iterative methods for this in which instead of direct design of waveforms, the coefficients of orthogonal waveform combinations are designed. In the first method, coefficients of combinations are calculated by solving a convex optimization problem. By extending the first method, we have proposed a method for multi-target case in presence of signal dependent interference. However, the computational complexity of the first method is high and therefore we have proposed the second method, which is more suitable for real time applications. In the second method, in each step, waveform combination coefficients and received filter coefficients are designed in closed form. Simulation results show that the proposed methods can achieve higher SINR in comparison to other methods which are used in MIMO and phased array radars.

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Authors and Affiliations

  1. Cognitive Telecommunication Research Group, Department of Telecommunications, Faculty of Electrical Engineering, Shahid Beheshti University, G. C., Tehran, Iran

    Mohamad Haghnegahdar, Sadjad Imani, Seyed Ali Ghorashi & Esfandiar Mehrshahi

  2. Cyberspace Research Institute, Shahid Beheshti University, G. C., Tehran, Iran

    Seyed Ali Ghorashi

Authors
  1. Mohamad Haghnegahdar
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  2. Sadjad Imani
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  3. Seyed Ali Ghorashi
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  4. Esfandiar Mehrshahi
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Correspondence to Seyed Ali Ghorashi.

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Haghnegahdar, M., Imani, S., Ghorashi, S.A. et al. A New Iterative Approach in SINR Improvement of MIMO Radars by Using Combination of Orthogonal Waveforms. Wireless Pers Commun 97, 2069–2085 (2017). https://doi.org/10.1007/s11277-017-4596-2

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  • DOI: https://doi.org/10.1007/s11277-017-4596-2

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