Design of 24 GHz Radar with Subspace-Based Digital Beam Forming for ACC Stop-and-Go System

Jeong, Seonghee; Oh, Jun-Nam; Lee, Kwae-Hi

doi:10.4218/etrij.10.0210.0107

Cited by 13 publications

(11 citation statements)

References 6 publications

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“…Then, each video stream is decompressed by the H.264/AVC decoder, and the set of video sequence distortions is calculated. The values of the model parameters θ, R 0 , and D 0 are chosen to approximate the operation rate-distortion curve by function (17). The value ofD (k) n−1 is calculated as the average distortion between the frames with numbers n and n − 1 in the test video sequence.…”

Section: D(δ[k N]) and Rate R(δ[k N]) Where δ[K N] Is A Quantizatmentioning

confidence: 99%

“…The required compression ratio is achieved by selection of quantization steps Δ b for the background blocks in the frames. From (17), (18), and (24), it follows that M = X(δ, x) holds, when…”

Section: B Roi Coding and Quantization Step Selectionmentioning

confidence: 99%

“…• 24-GHz monopulse FMCW sensors are already available in modern cars for adaptive cruise control application [16]; estimating the azimuth and the range of oncoming objects is merely an additional digital signal processing task [17]. • In contrast to other approaches for real-time vehicle detection, e.g., camera-based approaches [18], a radar-based approach requires rather limited signal processing and is naturally suitable for the detection of oncoming objects with no a priori knowledge about their type and shape, weather conditions, etc.…”

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confidence: 99%

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The Use of Automotive Radars in Video-Based Overtaking Assistance Applications

Belyaev

Molchanov

Vinel³

et al. 2013

IEEE Trans. Intell. Transport. Syst.

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Overtaking on rural roads may cause severe accidents when oncoming traffic is detected by a driver too late, or its speed is underestimated. Recently proposed cooperative overtaking assistance systems are based on real-time video transmission, where a video stream captured with a camera installed at the windshield of a vehicle is compressed, broadcast through the wireless channel, and displayed to the drivers of vehicles driving behind. In such a system, it is of ultimate importance to deliver video information about the opposite lane with low end-to-end latency and good visual quality. In this paper, we propose reallocating the wireless channel resources in favor of the part of the captured video frame containing the image of the oncoming vehicle. To achieve this goal, we apply automotive radar for oncoming vehicle detection, and we use the image of this vehicle as a region-of-interest (ROI) for the video rate control. We present the theoretical framework, which describes the basics of such an approach and can serve as a useful guideline for the future practical implementation of the overtaking assistance systems. The benefits of our proposal are demonstrated in relation to the practical scenario of H.264/Advance Video Coding (AVC), IEEE 802.11p/Wireless Access for Vehicular Environments (WAVE) intervehicle communication standards, and currently used automotive radars.Index Terms-Automotive radar, cooperative awareness, IEEE 802.11p/Wireless Access for Vehicular Environments (WAVE), overtaking assistance, real-time video transmission, region-ofinterest (ROI) coding, vehicular ad hoc network (VANET).

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Section: D(δ[k N]) and Rate R(δ[k N]) Where δ[K N] Is A Quantizatmentioning

confidence: 99%

Section: B Roi Coding and Quantization Step Selectionmentioning

confidence: 99%

mentioning

confidence: 99%

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The Use of Automotive Radars in Video-Based Overtaking Assistance Applications

Belyaev

Molchanov

Vinel³

et al. 2013

IEEE Trans. Intell. Transport. Syst.

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“…In the current applications of short‐range car detection [ Hyun et al, ], the resolution of detection can be enhanced by increasing the frequencies close to a millimeter wave band [ Currie and Brown , ], where a broad bandwidth of 250 MHz at 24.125 GHz in K band [ Jeong et al, ] is used to enhance the resolution of FMCW in the target detection at short range in this work. In this case, the wavelength is roughly 1.25 cm, and the detectable range is expected to reach 30 m in free space, suitable for the side‐looking car detections.…”

Section: Introductionmentioning

confidence: 99%

Implementation of antenna space and beam diversities in a K band FMCW radar system for the short‐range vehicular detections

Chou

Chang

2017

Radio Science

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This paper presents the design of a frequency‐modulated continuous wave (FMCW) radar system for the short‐range vehicle detections at K band. The antenna system employs phased arrays to control the radiation patterns to simplify the signal process complexity, which are implemented separately for the transmitter (TX) and receiver (RX), respectively. In particular, the space and angular beam diversities are implemented for RX channels to enhance the detection accuracy. The system is implemented at 24.125 GHz with a bandwidth of 250 MHz, which is used to realize a linear frequency modulation with a TX power of 1 mW. The detection is determined by considering the peak values of signal responses obtained by performing the fast Fourier transform over the signals received by the two RX channels. In this paper, the system architecture is first overviewed, the antenna designs are afterward presented to show their radiation characteristics, and finally, the system is experimentally examined to demonstrate the feasibility.

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“…However, these bulky radar sensors have a spatial limitation in the aspect of frontal bumper installation and make the cost of an ACC stop-and-go system high. In order to reduce the size and cost of these bulky radar systems, a single sensor based 24 GHz radar with a one-channel transmitter and four-channel receiver was developed [12]. However, the single beam radar with only one-channel transmitter is difficult to discriminate a primary vehicle in the center lane and vehicles in an adjacent lane in dense traffic situation.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Beam and Multi-Range Radar With FMCW and Digital Beam Forming for Automotive Applications

Jeong¹,

Yu²,

Lee³

et al. 2012

PIER

Self Cite

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Abstract-In this paper, we propose a multi-beam and multi-range (MBMR) radar with frequency modulated continuous wave (FMCW) waveform and digital beam forming (DBF) algorithm to cover a detection area of long range and narrow angle (150 m, ±10 • ) as well as short range and wide angle (60 m, ±30 • ) as a single 24 GHz sensor. The developed radar is highly integrated with multiple phased-array antennas, a two-channel transmitter and a four-channel receiver using K-band GaAs RF ICs, and back-end processing board with subspacebased DBF algorithm. The proposed 24 GHz MBMR radar can be used for an adaptive cruise control (ACC) stop-and-go system which typically consists of three radars, such as two 24 GHz short-range radars for object detection in an adjacent lane and one 77 GHz longrange radar for object detection in the center lane.

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Design of 24 GHz Radar with Subspace-Based Digital Beam Forming for ACC Stop-and-Go System

Cited by 13 publications

References 6 publications

The Use of Automotive Radars in Video-Based Overtaking Assistance Applications

The Use of Automotive Radars in Video-Based Overtaking Assistance Applications

Implementation of antenna space and beam diversities in a K band FMCW radar system for the short‐range vehicular detections

A Multi-Beam and Multi-Range Radar With FMCW and Digital Beam Forming for Automotive Applications

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