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High-Performance GLR Detector for Moving Target Detection in OFDM Radar-Based Vehicular Networks

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Abstract

Nowadays, orthogonal frequency division multiplexing (OFDM) radars have been used in many applications such as target detection and recognition in vehicular networks and surveillance systems, according to their frequency diversity property. The model of the received signal in an OFDM radar based on target’s parameters has a non-linear form with respect to unknown velocity and scattering coefficients, so there is no possibility of achieving a closed form solution for Maximum Likelihood Estimation of the unknown parameters and so the Neyman–Pearson detector. Therefore, in all published works, the generalized likelihood ratio (GLR) detector is obtained for the target with known velocity, or in case of simultaneous unknown velocity and scattering coefficients, only a wide two-dimensional grid search over all possible values of the unknown parameters is considered to maximize the Likelihood ratio. In this paper, a new method is proposed for simultaneous estimations of target velocity and scattering coefficients using a coordinate descent approach, which reduces the above nonlinear problem to two linear problems, and makes the implementation of GLR detector efficient. The simulation results confirm the efficiency of the proposed method.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, Shiraz University of Technology, Shiraz, Iran

    Shaghayegh Kafshgari, Reza Mohseni, Sadegh Samadi & Mohammad Reza Khosravi

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  1. Shaghayegh Kafshgari
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  2. Reza Mohseni
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  3. Sadegh Samadi
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  4. Mohammad Reza Khosravi
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Correspondence to Sadegh Samadi or Mohammad Reza Khosravi.

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Kafshgari, S., Mohseni, R., Samadi, S. et al. High-Performance GLR Detector for Moving Target Detection in OFDM Radar-Based Vehicular Networks. Wireless Pers Commun 108, 751–768 (2019). https://doi.org/10.1007/s11277-019-06427-6

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