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Kumbul, U. (author), Uysal, Faruk (author), Silveira Vaucher, C. (author), Yarovoy, Alexander (author)Mutual interference between different radar waveforms used in automotive radar applications is studied. The existing interference analysis is extended to a generalised radar-to-radar interference equation that covers most of the common interference scenarios for automotive radar systems. The outcome of the generalised equation is demonstrated...journal article 2021
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de Jong, Richard J. (author), de Wit, Jacco J.M. (author), Uysal, Faruk (author)In the defence and security domain, camera systems are widely used for surveillance. The major advantage of using camera systems for surveillance is that they provide high‐resolution imagery, which is easy to interpret. However, the use of camera systems and optical imagery has some drawbacks, especially for application in the military domain....journal article 2021
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van Gaalen, R. (author), Uysal, Faruk (author)This paper establishes novel methods for vehicle localization and mapping using a 1D linear automotive radar array in conjuncture with pre-existing lidar maps, and tests if the generated radar map can be made to be 3 dimensional. The basic design of this study was to implement a SLAM (Simultaneous Localization And Mapping) system that co...conference paper 2020
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Uysal, Faruk (author), Orru, Simone (author)Phase-Coded frequency-modulated continuous-wave (PC-FMCW) radar is an emerging radar system with its unique features such as enabling joint sensing and communication or advanced interference mitigation. Even though radars with phase coding capabilities are available in the automotive radar market today, there are some challenges in phase coded...conference paper 2020
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Dogan, O. (author), Uysal, Faruk (author), Hoogeboom, P. (author), López-Dekker, Paco (author), Li, Y. (author)This paper discusses the design details of a high resolution, low "Size, Weight, Power and Cost" (SWaP-C) radar altimeter (RA) system. Operating frequency of the radar is chosen within the Ka-band to achieve the desired size and weight requirements, that are highly demanded for the small satellite missions in a cost-efficient way. We propose a...conference paper 2020
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Lampel, Franz (author), Uysal, Faruk (author), Tigrek, Firat (author), Orru, Simone (author), Alvarado, Alex (author), Willems, Frans (author), Yarovoy, Alexander (author)This paper describes an FMCW based radar and communication (RadCom) system and addresses the challenges in the synchronization of multiple units for communication functionality. We proposed a novel technique to detect the FMCW RadCom signal at the communication receiver and derive the detection and false alarm probabilities of it. Moreover,...conference paper 2020
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de Jong, Richard J. (author), Uysal, Faruk (author), Heiligers, Matijs J.C. (author), de Wit, Jacco (author)Camera systems are widely used for surveillance in the security and defense domains. The main advantages of camera systems are their high resolution, their ease of use, and the fact that optical imagery is easy to interpret for human operators. However, particularly when considering application in the defense domain, cameras have some...conference paper 2020
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Overdevest, J. (author), Jansen, Feike (author), Uysal, Faruk (author), Yarovoy, Alexander (author)Utilization of phase-coded waveforms in automotive MIMO radars for short to medium range applications is studied. Performances of three most-promising binary code families (Gold, APAS and ZCZ sequences) are compared. Design tradeoffs of practical implementation of phased-coded waveforms for MIMO radar are analyzed for the first time for a...journal article 2020
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Dogan, O. (author), Uysal, Faruk (author), López-Dekker, Paco (author)A wide-swath synthetic aperture radar (SAR) image is known to be achievable by merging multistatic aliased data that is collected with an appropriate along-track displacement. However, in terms of both flexibility requirements like potentiality of both along-track and cross-track (XT) interferometry and design requirements like orbital safety,...journal article 2020
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Uysal, Faruk (author)A frequency-modulated continuous-wave (FMCW) radar takes advantage of stretch processing (dechirping, deramping) to reduce the sampling requirements of radar systems such as automotive radars. When applying phase coding into FMCW radar systems for interference mitigation or joint communication, preservation of this benefit is not possible, due...journal article 2020
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Overdevest, Jeroen (author), Jansen, Feike (author), Laghezza, Francesco (author), Uysal, Faruk (author), Yarovoy, Alexander (author)An extensive comparison on radar-to-radar interference in frequency-modulated continuous wave (FMCW) and binary phase-modulated continuous wave (PMCW) radars is performed. The noise-plus-interference power for FMCW-to-FMCW and PMCW-to-PMCW interference in a single victim and single interferer environment is compared for generalized waveform...conference paper 2019
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Uysal, Faruk (author), Aubry, P.J. (author), Yarovoy, Alexander (author)Automotive radars suffer from low angular estimation accuracy due to the limited number of antennas and insufficient onboard processing power. This paper addresses the single target tracking problem in automotive radar by using recently proposed MIMO-monopulse approach which blends the monopulse approach with the collocated MIMO radar. We...conference paper 2019
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Iannini, L. (author), Mancinelli, A. (author), López-Dekker, Paco (author), Hoogeboom, P. (author), Li, Y. (author), Uysal, Faruk (author), Yarovoy, Alexander (author)The work investigates staggered and random PRF (Pulse Repetition Frequency) strategies for a close formation of small Synthetic Aperture Radar (SAR) satellites operating in a multistatic configuration. The satellites are positioned within a fraction of the along-track critical baseline, hence allowing for the application of Displaced Phase...conference paper 2019
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Neemat, S.A.M. (author), Uysal, Faruk (author), Krasnov, O.A. (author), Yarovoy, Alexander (author)A reconfigurable range-Doppler processing method for FMCW radar is presented. By concatenating beat-frequency signals from more than one sweep, a continuous beat-frequency signal for the whole coherent processing interval (CPI) can be created. As a result, continuous targets' observation time is extended beyond that of a single chirp duration...journal article 2019
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Uysal, Faruk (author), Sanka, Sasanka (author)This paper presents a new approach to mitigating radar interference and focuses on the application of automotive radar. Traditional interference mitigation techniques in automotive radar depend on detection and identification of the interference. With this paper, we propose a novel method based on advanced signal separation techniques which do...conference paper 2018
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Feng, Ruoyu (author), Uysal, Faruk (author), Aubry, P.J. (author), Yarovoy, Alexander (author)In this study, the authors propose a novel direction of arrival (DoA) estimation algorithm called ‘multiple-input–multiple-output (MIMO)–monopulse’ by combining the monopulse approach with MIMO radar. Monopulse is fast and accurate angle estimation algorithm, which has been well developed for tracking radar. The application of the monopulse...journal article 2018
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Feng, Ruoyu (author), Uysal, Faruk (author), Yarovoy, Alexander (author)A novel target azimuth estimation algorithm called ”MIMO-Monopulse” is proposed by combining monopulse approach with multiple-input multiple-output (MIMO) radar. Chebyshev and Zolotarev weighting are applied to synthesis sum and difference pattern of MIMO-monopulse. A new visualization method for monopulse ratio is discussed. Finally, the...conference paper 2018
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Uysal, Faruk (author)This paper considers the interference mitigation problem for radar systems by focusing on emerging signal separation (decomposition) methods. We define appropriate transform domains to sparsely represent the interference and the signal of interest to separate them from each other. To show the effectiveness of the proposed algorithm at actual...journal article 2018
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Uysal, Faruk (author)The next generation digital radars are able to provide high-range resolution by the advancement of radar hardware technologies. These systems take advantage of coherent integration and Doppler processing technique to increase the target’s signal-to-noise ratio. Due to the high-range resolution (small range cells) and fast target motion, a target...journal article 2017
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Uysal, Faruk (author), Martin, J.C. (author), Goodman, N.A. (author)This paper presents a method for exploiting wideband spectral information of real-valued radio frequency (RF) signals using the Nyquist Folding Receiver architecture. A new system model based on a symmetric modulation matrix is introduced so that the frequency band of the real input signals can be estimated without in-phase and quadrature...conference paper 2017