Article
Engineering, Civil
Danping He, Ke Guan, Bo Ai, Zhangdui Zhong, Junhyeong Kim, Heesang Chung, Andrej Hrovat
Summary: This study focuses on the channel measurements and ray-tracing simulations for frequency modulated continuous wave (FMCW) automotive mmWave radar. By proposing a measurement-based electromagnetic parameter estimation method, the issue of lacking reliable material parameters for RT simulation at 77 GHz frequency band is addressed. The simulations are validated in various domains, allowing for more reliable channel testing in different environments and configurations.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Zhaorui Zang, Ashraf Uz Zaman, Jian Yang
Summary: A single layer 77 GHz dual circularly polarized antenna array based on ridge gap waveguides (RGWs) technology is proposed in this paper. The experimental results demonstrate good agreement with simulations, indicating that the antenna has great potential for applications in automotive radars.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Tianqi Xu, Danyang Yu, Lei Du
Summary: This paper proposes a calibration method and establishes a bi-objective simulation facility for the speed and range calibration of 24 GHz and 77 GHz automotive millimeter-wave radars. The feasibility of the proposed calibration method and the accuracy of the established bi-objective simulation facility are verified by experiments conducted on two millimeter-wave radar samples. The results show that the 77 GHz millimeter-wave radar sample has superior speed measurement accuracy and smaller range measurement errors compared to the 24 GHz sample. The proposed calibration method and simulation facility can satisfy the calibration requirements of speed resolution up to 0.01 m/s and range resolution up to 0.1 m for both 24 GHz and 77 GHz millimeter-wave radars.
Article
Engineering, Electrical & Electronic
Zhaorui Zang, Ashraf Uz Zaman, Jian Yang
Summary: This article proposes a series-fed, single-layer dual-circularly polarized slot array antenna that is fed by a stepped ridge gap waveguide (RGW) at the 77-GHz band. The antenna is capable of generating dual-circularly polarized waves, making it suitable for next-generation polarimetric radar in automotive applications. The antenna consists of eight columns of linear arrays and two feeding ports for exciting the slots. The design process and measured results are presented in this article. The measured results demonstrate that the achieved gain of the proposed antenna is above 27.3 dBi, with an axial ratio of about 2 dB over the frequency range of 76-79 GHz, exhibiting dual-CP patterns. The S-11 and S-22 values for the proposed antenna are below -10 dB, and the measured port isolation is above 17.5 dB.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Christian Winter, Maximilian Korff, Tiziano Fabbri, Stefan Holzknecht, Ingo Weber, Erwin M. Biebl
Summary: This paper presents a method for determining the relative permittivities of automotive coatings to ensure that radar sensors for highly automated driving functions can be installed without affecting the vehicle design.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Green & Sustainable Science & Technology
Canan Aydogdu, Henk Wymeersch, Olof Eriksson, Hans Herbertsson, Mats Rydstrom
Summary: A synchronization-free radar communication technology, relying on relative time for radar coordination, has been proposed to effectively mitigate interference. It achieves precise radar coordination without depending on the absolute time provided by GPS.
Article
Engineering, Electrical & Electronic
Yi Wang, Qixun Zhang, Zhiqing Wei, Liping Kui, Fan Liu, Zhiyong Feng
Summary: This article analyzes the mutual interference among multiple Frequency Modulated Continuous Wave (FMCW) radars. The interference is precisely modeled using the Matern Hard-Core Process (MHCP) model and is analyzed in terms of channel fading, directional antenna pattern, and fluctuation of the target Radar Cross-Section (RCS) in different scenarios. The performance of interference mitigation approaches, including Random Frequency Division Multiplexing (RFDM), Frequency Hopping (FH), and a novel AFH-PM approach, is evaluated. Simulation results show significant performance improvement with RFDM, FH, and AFH-PM.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xihui Teng, Kaixue Ma, Ningning Yan, Yu Luo
Summary: This research proposes a low-cost automotive radar antenna for 77 GHz applications using substrate integrated suspended line technology. By incorporating embedded air cavities and double-layer wiring, the antenna achieves suppressed sidelobe levels and a wide bandwidth coverage.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Computer Science, Information Systems
Claudio Nocera, Giuseppe Papotto, Giuseppe Palmisano
Summary: This paper presents a 77 GHz two path power amplifier (PA) for automotive radar applications. The proposed PA, fabricated in advanced CMOS technology, demonstrates high output power and power added efficiency. It is suitable for automotive radar systems, providing accurate power amplification and output power monitoring.
Article
Engineering, Electrical & Electronic
Muhammad Rameez, Mats Pettersson, Mattias Dahl
Summary: This article proposes a novel interference mitigation technique utilizing pulse compression principle for compressing and mitigating interference in mm-wave FMCW radars. It compresses the interference in the received time-domain signal using an estimated matched filter and repairs the signal in the pulse-compressed domain using an autoregressive model. Real outdoor measurements show effective suppression of interference to the noise floor and a significant SINR gain.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Civil
Canan Aydogdu, Musa Furkan Keskin, Nil Garcia, Henk Wymeersch, Daniel W. Bliss
Summary: This article discusses the integration of radar and communication systems to reduce interference between the two systems, proposing a distributed networking protocol RadChat that can significantly reduce mutual interference among radars.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Engineering, Civil
Jianping Wang
Summary: This paper proposes CFAR detector-based approaches for interference mitigation in FMCW radars, exploiting the characteristics of target beat signals and interference in the time-frequency domain. By applying a CFAR detector along each frequency bin to detect the interference spectra, the detected map is used as a mask for interference suppression. The proposed methods are applicable in scenarios with multiple interferences and effectively reduce power loss of useful signals.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Xiangyu Gao, Hui Liu, Sumit Roy, Guanbin Xing, Ali Alansari, Youchen Luo
Summary: This paper investigates the problem of using low-cost 77 GHz mmWave radar for detecting carried objects. The proposed system is able to detect laptops, phones, and knives in real-time under open carry and concealed cases. The system achieves this through initial signal processing, deep learning-based prediction, and post-processing. Extensive experiments validate the system's performance and analyze the impact of different factors on its performance.
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Nil Munte, Antonio Lazaro, Ramon Villarino, David Girbau
Summary: This paper introduces a framework of vehicle occupancy detectors based on mm-Wave radar technology. By measuring small movements of the body on the seats, the system can accurately detect whether there are people occupying the seats.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Arindam Bose, Bo Tang, Mojtaba Soltanalian, Jian Li
Summary: The number of commercial and civilian vehicles equipped with automotive radars is expected to rise rapidly in the forthcoming years, leading to increased mutual interference between radar sensors. However, a system of connected vehicles can efficiently address this issue by sharing information amongst themselves. The proposed efficient waveform design algorithm can significantly reduce interference power levels in radar cross-ambiguity functions through collaborative design among vehicles.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
