Adaptive Waveform Design for Communication-Enabled Automotive Radars

Ozkaptan, Ceyhun D.; Ekici, Eylem; Altintas, Onur

doi:10.1109/twc.2021.3125924

Cited by 12 publications

(8 citation statements)

References 43 publications

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“…Antennas in the automotive context have great importance, addressing various applications. Besides well-known positions like the roof, addressing GPS (Global Positioning System) or FM (frequency modulation) radio (Yang et al, 2020;Liu et al, 2019), radar sensors are mounted at the front and back bumper generally (Patole et al, 2017). In the future, even more antennas will be required, e. g. to provide a 360 • radar sensor view for autonomous driving, while in the context of communications massive Multiple Input Multiple Output (MIMO) and increased data rates will also demand a higher amount of antennas (He et al, 2019).…”

Section: Influence Of the Antenna Setupmentioning

confidence: 99%

“…Additionally, the underlying FMCW waveform is currently under considerable discussion, especially due to the high interference to be expected, justified by the increasing number of vehicles equipped with radar sensors with a simultaneous increase in the number of radar sensors in a single vehicle (Goppelt et al, 2011;Engels et al, 2021). As a result, and especially in the context of future JCRS systems, various waveforms are being considered (Thomä et al, 2021;Ozkaptan et al, 2021), which in turn include some waveforms known from the communications domain, such as Orthogonal Frequency-Division Multiplexing (OFDM) or Code Division Multiple Access (CDMA)-based systems. This is also related to the discussions on whether being radar-centric or communications-centric, i.e., which service to consider as the primary service.…”

Section: Limitationsmentioning

confidence: 99%

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Antenna Setup for Future Joint Radar-Communications – Characteristics and Mounting Positions

et al. 2023

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Abstract. The development of millimeter wave systems is driven by the strong trend toward new communications generations and especially by the emerging joint radar and communications design approach. Safety-critical applications like platooning or intersection assistance will significantly benefit from the combination of sensing and communications. While radar performs a channel measurement and thus, needs a wide field of view (especially in city/intersection scenarios), communications aims to minimize the interference for other not addressed receivers (e. g. in a platoon) by a focused antenna design. The proposed work extends the analysis of the influence of various antenna positioning for a typical automotive scene by taking also different characteristics (antenna gain, half power beamwidth, and sidelobe level) into account. Hereby, it is mandatory to investigate the communications and sensing performance simultaneously. The positions at the front bumper – typical for radar sensors – and especially at the left mirror convinced regarding the vehicular communications as well as the sensing behaviour. Applying focused antennas is promising, however, has also limits if the signals are not received out of the main beam but out of the sidelobes, resulting in a critical communications performance. Thus, beam steering is recommended to be applied in the future.

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Section: Influence Of the Antenna Setupmentioning

confidence: 99%

Section: Limitationsmentioning

confidence: 99%

Antenna Setup for Future Joint Radar-Communications – Characteristics and Mounting Positions

et al. 2023

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“…In the ISAC system described in [35], not all N c subcarriers were utilized to embed information symbols, and the empty subcarriers of the OFDM signal were filled with optimized frequency-domain samples to improve the sensing performance. In [36], different powers and phase codings were allocated to subcarriers according to the frequency-selectivity of wideband channel. Similarly, in [37], the transmit codes to allocate the subcarrier power and the receive filters were jointly designed to obtain the desired waveform.…”

Section: A Ofdmmentioning

confidence: 99%

Integrated Sensing and Communication Waveform Design: A Survey

Zhou

Zhang

Chen

et al. 2022

IEEE Open J. Commun. Soc.

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Integrated sensing and communication (ISAC) has been widely recognized as a key technology in future sixth-generation (6G) wireless networks, especially for emerging applications and scenarios demanding both high-performance sensing and communication functionalities. The ISAC technique has the potential of enabling sensing and communication functionalities in a single hardware platform, even sharing the same waveform, thus, achieving the reduced cost of hardware implementation and the efficient use of spectrum resources. In this paper, we commence with the discussion on sensing and communication at the current stage from the view of motivations, applications, and challenges. Then, we provide a comprehensive survey of the state-of-the-art approaches to the ISAC technique from the waveform design perspective. To be specific, we classify the waveform design methods into three categories, namely, communicationcentric waveform design, sensing-centric waveform design, and joint waveform optimization and design. In addition, potential research directions and challenges for future ISAC waveform design are outlined.INDEX TERMS 6G, integrated sensing and communication, communication-centric waveform design, sensing-centric waveform design, joint waveform optimization and design.

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“…OFDM waveforms provide high communication data rates and the ability to efficiently deal with frequency selective fading. Hence, many researchers have investigated the OFDM-integrated radar and communications waveform [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. In [ 18 , 19 ], the authors proposed a waveform design method that maximizes the weighted sum of the communications data information rate (DIR) and the conditional mutual information (MI) between the observed signal and the random target impulse response over the entire uncertainty class.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [ 23 ] transformed the optimal waveform design problem by designing subcarrier coefficients for optimal power allocation and phase coding. The above methods add a coefficient before the subcarrier of the OFDM waveform and use different optimization criteria to achieve the optimal waveform design.…”

Section: Introductionmentioning

confidence: 99%

Inner-Frame Time Division Multiplexing Waveform Design of Integrated Sensing and Communication in 5G NR System

Zheng,

Chu,

Wang

et al. 2023

Sensors

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The design of an integrated sensing and communication (ISAC) waveform compatible with the 5G new radio (NR) system is crucial in enabling ISAC by utilizing the hardware of existing base stations (BSs). In this paper, we design an inner-frame time division multiplexed sensing waveform in the frame structure of 5G NR to achieve ISAC. The designed waveform is computed by the simulated annealing algorithm on an optimization cost function of a constrained combination of the peak-to-sidelobe ratio (PSLR) and the integrated sidelobe ratio (ISLR) of the velocity ambiguity function. Specifically, the constraints are the 5G communication protocol and 5G NR frame structure. In addition, we conducted corresponding signal detection and estimation methods to illustrate the performance of the sensing waveform. Both theoretical analysis and simulation experiments show that the designed waveform can effectively achieve target detection and parameter estimation under low sensing cost conditions.

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Adaptive Waveform Design for Communication-Enabled Automotive Radars

Cited by 12 publications

References 43 publications

Antenna Setup for Future Joint Radar-Communications – Characteristics and Mounting Positions

Antenna Setup for Future Joint Radar-Communications – Characteristics and Mounting Positions

Integrated Sensing and Communication Waveform Design: A Survey

Inner-Frame Time Division Multiplexing Waveform Design of Integrated Sensing and Communication in 5G NR System

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