Joint Radar-Communications Strategies for Autonomous Vehicles

Ma, Dingyou; Shlezinger, Nir; Huang, Tianyao; Liu, Yimin; Eldar, Yonina C.

doi:10.48550/arxiv.1909.01729

Cited by 8 publications

(15 citation statements)

References 56 publications

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“…GSM combines IM, in which data is conveyed in the transmission parameters, with dedicated communications signaling. As such, the proposed approach exhibits only a minor degradation in radar performance due to the presence of data transmission, as common in IM based DFRC systems [2], while supporting the increased data rates with individual waveforms.…”

Section: Introductionmentioning

confidence: 61%

“…Traditionally, these two functionalities are designed independently, using separate subsystems. An alternative strategy, which is the focus of growing research attention, is to jointly design them as a dual function radarcommunications (DFRC) system [2]- [6]. Such joint designs improve performance by facilitating coexistence [2], [3], as well as contribute to reducing the number of antennas [4], system size, weight, and power consumption [7].…”

Section: Introductionmentioning

confidence: 99%

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Spatial Modulation for Joint Radar-Communications Systems: Design, Analysis, and Hardware Prototype

Ma,

Shlezinger,

Huang

et al. 2020

Preprint

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Dual-function radar-communications (DFRC) systems implement radar and communication functionalities on a single platform. Jointly designing these subsystems can lead to substantial gains in performance as well as size, cost, and power consumption. In this paper, we propose a DFRC system, which utilizes generalized spatial modulation (GSM) to realize coexisting radar and communications waveforms. Our proposed GSM-based scheme, referred to as spatial modulation based communication-radar (SpaCoR) system, allocates antenna elements among the subsystems based on the transmitted message, thus achieving increased communication rates by embedding additional data bits in the antenna selection. We formulate the resulting signal models, and present a dedicated radar processing scheme. To evaluate the radar performance, we characterize the statistical properties of the transmit beam pattern. Then, we present a hardware prototype of the proposed DFRC system, demonstrating the feasibility of the scheme. Our experimental results show that the proposed GSM system achieves improved communication performance compared to techniques utilizing fixed allocations operating at the same data rate. For the radar subsystem, our experiments show that the spatial agility induced by the GSM transmission improves the angular resolution and reduces the sidelobe level in the transmit beam pattern compared to using fixed antenna allocations.

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Section: Introductionmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Spatial Modulation for Joint Radar-Communications Systems: Design, Analysis, and Hardware Prototype

Ma,

Shlezinger,

Huang

et al. 2020

Preprint

Self Cite

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show abstract

“…1) Related Work: There are several prior works on mitigation techniques against mutual interference or attacks on the automotive radars. Communication-based techniques such as dual function radar-communication [8][9] proved effectiveness only against interference signals. Meanwhile, our proposed work provides a countermeasure against intended attack signals as well.…”

Section: Interferersmentioning

confidence: 99%

BlueFMCW: Random Frequency Hopping Radar for Mitigation of Interference and Spoofing

Moon¹,

Park²,

Kim³

2020

Preprint

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Traffic safety is the foremost value that automotive radar systems aim to pursue. Unlike in mobile communication systems, the literature for radar systems did not adequately address inter-radar interference and security threats such as jamming and spoofing, which in turn threatens the traffic safety. In this context, we introduce a novel frequency-modulated continuous-wave (FMCW) radar scheme (namely, BlueFMCW) that mitigates both interference and spoofing signals. BlueFMCW randomly hops frequency to avoid interference and spoofing signals. Our phase alignment algorithm is capable of removing the phase discontinuity while combining the beat signals from the randomly-hopped chirps, and thereby radar's resolution is not compromised. The simulation results show that BlueFMCW can efficiently mitigate the interference and spoofing signals in various scenarios without paying its resolution.

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“…dt denotes the cross-ambiguity function between two generic pulses u and v, as defined in [30]. Finally, the received samples in the Doppler-delay domain are obtained by applying the symplectic finite Fourier transform (SFFT) to (7), i.e.,…”

Section: Otfs Input-output Relationmentioning

confidence: 99%

On the Effectiveness of OTFS for Joint Radar and Communication

Gaudio,

Kobayashi,

Caire

et al. 2019

Preprint

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We consider a joint radar estimation and communication system using orthogonal time frequency space (OTFS) modulation. The scenario is motivated by vehicular applications where a vehicle equipped with a mono-static radar wishes to communicate data to its target receiver, while estimating parameters of interest related to this receiver. In a point-to-point communication setting over multi-path time-frequency selective channels, we study the joint radar and communication system from two perspectives, i.e., the radar estimation at the transmitter as well as the symbol detection at the receiver. For the radar estimation part, we derive an efficient approximated Maximum Likelihood algorithm and the corresponding Cramér-Rao lower bound for range and velocity estimation. Numerical examples demonstrate that multi-carrier digital formats such as OTFS can achieve as accurate radar estimation as state-of-the-art radar waveforms such as frequency-modulated continuous wave (FMCW). For the data detection part, we focus on separate detection and decoding and consider a soft-output detector that exploits efficiently the channel sparsity in the Doppler-delay domain. We quantify the detector performance in terms of its pragmatic capacity, i.e. the achievable rate of the channel induced by the signal constellation and the detector soft output. Simulations show that the proposed scheme outperforms concurrent state-of-the-art solutions.Overall, our work shows that a suitable digitally modulated waveform enables to efficiently operate joint radar and communication by achieving full information rate of the modulation and near-optimal radar estimation performance. Furthermore, OTFS appears to be particularly suited to the scope.

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Joint Radar-Communications Strategies for Autonomous Vehicles

Cited by 8 publications

References 56 publications

Spatial Modulation for Joint Radar-Communications Systems: Design, Analysis, and Hardware Prototype

Spatial Modulation for Joint Radar-Communications Systems: Design, Analysis, and Hardware Prototype

BlueFMCW: Random Frequency Hopping Radar for Mitigation of Interference and Spoofing

On the Effectiveness of OTFS for Joint Radar and Communication

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