Recent advances in 94 GHz FMCW imaging radar development

Goshi, D.S.; Liu, Y.; Mai, Ken; Bui, L.Q.; Shih, Yi-Chi

doi:10.1109/mwsym.2009.5165636

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…Assume that the zenith angle remains constant. The RX antenna array pattern can thus be written as (18) where the element factor , horn antenna pattern function [28] in this case, is given by (19) and the array factor in (18) is (20) Notably, the azimuth in (19) ranges from 0 to 180 . In the experiment, the horn antennas with of 10 cm and of 7.5 cm are used as antenna elements, where is chosen around GHz; in addition, the spacing between two RX antenna elements is about 10.6 cm.…”

Section: B Azimuth Detection In the Cw Modementioning

confidence: 99%

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Detection of Concealed Individuals Based on Their Vital Signs by Using a See-Through-Wall Imaging System With a Self-Injection-Locked Radar

Wang

Horng

Peng

et al. 2013

IEEE Trans. Microwave Theory Techn.

106

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Abstract-This paper presents a self-injection-locked (SIL) radar with ranging and tracking capabilities to see through walls for discovering hidden people. Characterized by low complexity and high sensitivity, the proposed SIL radar merges the frequency-modulated continuous-wave and sum-difference pattern detection approaches to determine the distance and azimuth from the radar to each individual in a scene behind a wooden partition wall. An individual can be distinguished from a stationary object by using dynamic spectral subtraction to extract human motions or vital signs. Additionally, two or more individuals can be distinguished from each other by decomposing the Doppler signal into contributions of individuals in a polar domain. Consequently, a see-through-wall imaging system is constructed with the proposed SIL radar to position different individuals concealed behind a wall.

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Section: B Azimuth Detection In the Cw Modementioning

confidence: 99%

“…Since the early 1990s, FMCW technology has been adopted in imaging radars to provide a real-time image with obscured line of sight [19]- [21]. Recent works [21] located a moving subject behind a wall by subtracting real-time output spectra to remove the clutter signals produced by stationary objects.…”

Section: Introductionmentioning

confidence: 99%

Detection of Concealed Individuals Based on Their Vital Signs by Using a See-Through-Wall Imaging System With a Self-Injection-Locked Radar

Wang

Horng

Peng

et al. 2013

IEEE Trans. Microwave Theory Techn.

106

View full text Add to dashboard Cite

show abstract

“…The cable imaging system in this work is an evolution of the legacy hardware that is described in [7]. In addition to the front-end unit that is mounted external to the aircraft, the system also includes a back-end processing unit that consists of a PC-based COTS architecture and a DSP board.…”

Section: B the Active Millimeter-wave Sensormentioning

confidence: 99%

“…However, previous approaches do not address this issue. In this paper we propose a cable detection algorithm that is based on the real aperture millimeter-wave radar imaging results from [7] and [8]. We exploit the Bragg pattern, represent a line with a set of features that can distinguish a power line from a noise line using the Bragg pattern, and train a Support Vector Machine (SVM) [18] classifier to make a reliable classification.…”

Section: Introductionmentioning

confidence: 99%

An Algorithm for Power Line Detection and Warning Based on a Millimeter-Wave Radar Video

Goshi

Shih

et al. 2011

IEEE Trans. on Image Process.

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Power-line-strike accident is a major safety threat for low-flying aircrafts such as helicopters, thus an automatic warning system to power lines is highly desirable. In this paper we propose an algorithm for detecting power lines from radar videos from an active millimeter-wave sensor. Hough Transform is employed to detect candidate lines. The major challenge is that the radar videos are very noisy due to ground return. The noise points could fall on the same line which results in signal peaks after Hough Transform similar to the actual cable lines. To differentiate the cable lines from the noise lines, we train a Support Vector Machine to perform the classification. We exploit the Bragg pattern, which is due to the diffraction of electromagnetic wave on the periodic surface of power lines. We propose a set of features to represent the Bragg pattern for the classifier. We also propose a slice-processing algorithm which supports parallel processing, and improves the detection of cables in a cluttered background. Lastly, an adaptive algorithm is proposed to integrate the detection results from individual frames into a reliable video detection decision, in which temporal correlation of the cable pattern across frames is used to make the detection more robust. Extensive experiments with real-world data validated the effectiveness of our cable detection algorithm.

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“…Emerging applications in V and W-bands, e.g., 60-GHz shortrange wireless links [1], 77/79-GHz automotive radar [2] and radio imaging at 94 GHz [3], have pushed the research efforts to develop high performance mm-wave Si-based ICs. Both nanoscale CMOS and mm-wave optimized SiGe HBT technologies are valuable candidates to cover these new applications.…”

Section: Introductionmentioning

confidence: 99%

A 77‐GHz PA with ground‐plane parasitic cancellation in a SiGe HBT BiCMOS technology

Giammello

Ragonese

Palmisano

2011

Micro & Optical Tech Letters

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All-optical packet self-routing system for ultra-fast communication networks, Recent Res Dev Opt Eng 5 (2003), 35-60. 4. M.F. Iskander and Y. Zhengging, Propagation prediction models for wireless communication systems, IEEE Trans MTT 50 (2002), 662-673. 5. D. Wake, C.R. Lima, and P.A. Davies, Optical generation of millimeter waves signals for fiber-radio systems using a dual-mode DFB semiconductor laser,ABSTRACT: This letter presents a 77-GHz power amplifier implemented in a SiGe BiCMOS technology featuring bipolar transistors with 160/175-GHz f T /f max . The circuit adopts a two stage differential topology with integrated input/output matching networks. The amplifier performance is considerably improved thanks to proper input/output LC resonant networks, which cancel out the ground-plane parasitic effect. Matching networks use stacked transformers for impedance matching, differential-to-single-ended conversion, and electro-static discharge protection. The circuit achieves a power gain of 18.5 dB, a maximum output power of 11.6 dBm, with 4.2% power-added efficiency, and an output 1-dB compression point of 9.3 dBm.ABSTRACT: A small-signal lumped-element modeling technique for P-I-N photodiodes is presented. The model is extracted by fitting model's components with the accurately measured S parameters using the genetic algorithm. Experimental results indicate the extracted model is well matched to the measured data in the frequency range from 130 MHz to 20 GHz.

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Recent advances in 94 GHz FMCW imaging radar development

Cited by 17 publications

References 2 publications

Detection of Concealed Individuals Based on Their Vital Signs by Using a See-Through-Wall Imaging System With a Self-Injection-Locked Radar

Detection of Concealed Individuals Based on Their Vital Signs by Using a See-Through-Wall Imaging System With a Self-Injection-Locked Radar

An Algorithm for Power Line Detection and Warning Based on a Millimeter-Wave Radar Video

A 77‐GHz PA with ground‐plane parasitic cancellation in a SiGe HBT BiCMOS technology

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