A Cooperative MIMO Radar Network Using Highly Integrated FMCW Radar Sensors

Frischen, Andreas; Hasch, Jürgen; Waldschmidt, Christian

doi:10.1109/tmtt.2016.2647701

Cited by 56 publications

(25 citation statements)

References 10 publications

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“…When estimating the angle θ n , it is possible to make ( N 2 ) N = N −1 2 relevant triangle combinations. It is equivalent to (N − 1) equations according to (12), showing that more DoFs are given as N increases. • BC gain: A signal originated from the n-th antenna is broadcast to the other antennas.…”

Section: ) Transformation To 2d-coordinatesmentioning

confidence: 99%

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Joint Frequency-and-Phase Modulation for Backscatter-Tag Assisted Vehicular Positioning

Han

Huang

et al. 2019

2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

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Autonomous driving (auto-driving) has been becoming a killer technology for next generation vehicles, whereas some fatal accidents grow concerns about its safety. A fundamental function for safer auto-driving is to recognize the vehicles' locations, termed vehicular positioning. The state-of-the-art vehicular positioning is to rely on anchors that are stationary objects whose locations are known, i.e. satellites for GPS and base stations for cellular positioning. It is important for reliable positioning to install anchors densely, helping find enough anchors nearby. For the deployment to be cost-effective, there are some trials to use backscatter tags as alternative anchors by deploying them on a road surface, but its gain is limited by several reasons such as short contact time and difficulties in maintenance. Instead, we propose a new backscatter-tag assisted vehicular positioning system where tags are deployed along a roadside, which enables the extension of contact duration and facilitates the maintenance. On the other hand, there is a location mismatch between the vehicle and the tag, calling for developing a new backscatter transmission to estimate their relative position. To this end, we design a novel waveform called joint frequency-andphase modulation (JFPM) for backscatter-tag assisted vehicular positioning where a transmit frequency is modulated for the distance estimation assuming that the relevant signal is clearly differentiable from the others while the phase modulation helps the differentiation. The JFPM waveform leads to exploiting the maximum Degree-of-Freedoms (DoFs) of backscatter channel in which multiple-access and broadcasting channels coexist, leading to more accurate positioning verified by extensive simulations.

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Section: ) Transformation To 2d-coordinatesmentioning

confidence: 99%

“…Remark 2 (JFPM vs. FMCW). The frequency modulation (6) has been widely used in Radar named Frequency-Modulated Continuous-Wave (FMCW) [12]. However, it cannot differentiate multiple signal paths especially when they are equally separated, resulting in the loss of DoF.…”

Section: ) Transformation To 2d-coordinatesmentioning

confidence: 99%

Joint Frequency-and-Phase Modulation for Backscatter-Tag Assisted Vehicular Positioning

Han

Huang

et al. 2019

2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

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“…Network based localization involves several nodes detecting distance among each other or triangulate the position of passive targets by processing FMCW ramps of participating other transmitters (Ebelt et al, 2014;Frischen, 2017).…”

Section: Overview On Cooperative Targetsmentioning

confidence: 99%

Cooperative radar with signature method for unambiguity

Müller

Diewald

2019

Adv. Radio Sci.

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Abstract. The increasing availability of off-the-shelf high-frequency components makes radar measurement become popular in mainstream industrial applications. We present a cooperative FM radar for strongly reflective environments, being devised for a range of up to approx. 120 m. The target is designed with an unambiguous signature method and satisfies coherence. A prototype is built with commercial semiconductor components that operates in the 24 GHz industrial, scientific and medical band. First experimental results taken in sewage pipes are presented, using the target prototype and a standard FMCW radio station. An overview on four data acquisition procedures is given.

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“…In contrast, bistatic measurements are dramatically affected by PN as the LO signals are generated individually on each MMIC. Thus, very challenging requirements in PN performance of the TX signals have to be fulfilled to be able to evaluate bistatic distance measurements [3], [4]. Recent works also showed that it is possible to achieve signal coherency using adapted modulations and signal processing algorithms.…”

Section: Introductionmentioning

confidence: 99%

“…Recent works also showed that it is possible to achieve signal coherency using adapted modulations and signal processing algorithms. This also enables to realize Multiple Input Multiple Output (MIMO) radar systems but at the expense of SNR reduction in comparison to PN coherent systems [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Phase Noise Mitigation for Multistatic FMCW Radar Sensor Networks Using Carrier Transmission

Dürr¹,

Schweizer²,

Bechter³

et al. 2018

IEEE Microw. Wireless Compon. Lett.

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For incoherent radar sensor networks it is desirable to perform both monostatic and bistatic distance measurements. Especially the bistatic measurements enable to achieve additional information about a target. As for bistatic measurements different local oscillators (LO) are used for system operation, the phase noise (PN) at the receiving (RX) sensor node is uncorrelated to the PN of the transmitter (TX). This effect usually degrades the signal-to-noise ratio (SNR) for bistatic measurements in comparison to monostatic measurements. This letter briefly discusses the problem of PN correlation in bistatic distance measurements and proposes a novel system approach that mitigates phase errors between TX and RX oscillators. The proposed concept is mathematically derived and proven with measurements using a radar demonstrator at 77 GHz.

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A Cooperative MIMO Radar Network Using Highly Integrated FMCW Radar Sensors

Cited by 56 publications

References 10 publications

Joint Frequency-and-Phase Modulation for Backscatter-Tag Assisted Vehicular Positioning

Joint Frequency-and-Phase Modulation for Backscatter-Tag Assisted Vehicular Positioning

Cooperative radar with signature method for unambiguity

Phase Noise Mitigation for Multistatic FMCW Radar Sensor Networks Using Carrier Transmission

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