Software-Defined Six-Port Radar Technique for Precision Range Measurements

Zhang, Hui; Li, Lin; Wu, Ke

doi:10.1109/jsen.2008.2003304

Cited by 30 publications

(8 citation statements)

References 19 publications

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“…These publications demonstrate the suitability of this architecture for distance sensing [13,33]. Another dominant part of these presented works substitutes the homo- or hetero-dyne down-conversion mixer stages by a six-port receiver utilizing frequency modulated continuous wave (FMCW) as the signal modulation scheme [17,34]. Furthermore, combinations of the common FMCW radar concept and six-port continuous wave (CW) interferometry have been proposed [14].…”

Section: Six-port In Metrologymentioning

confidence: 99%

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Koelpin

Lurz

Linz

et al. 2016

Sensors

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Microwave technology plays a more important role in modern industrial sensing applications. Pushed by the significant progress in monolithic microwave integrated circuit technology over the past decades, complex sensing systems operating in the microwave and even millimeter-wave range are available for reasonable costs combined with exquisite performance. In the context of industrial sensing, this stimulates new approaches for metrology based on microwave technology. An old measurement principle nearly forgotten over the years has recently gained more and more attention in both academia and industry: the six-port interferometer. This paper reviews the basic concept, investigates promising applications in remote, as well as contact-based sensing and compares the system with state-of-the-art metrology. The significant advantages will be discussed just as the limitations of the six-port architecture. Particular attention will be paid to impairment effects and non-ideal behavior, as well as compensation and linearization concepts. It will be shown that in application fields, like remote distance sensing, precise alignment measurements, as well as interferometrically-evaluated mechanical strain analysis, the six-port architecture delivers extraordinary measurement results combined with high measurement data update rates for reasonable system costs. This makes the six-port architecture a promising candidate for industrial metrology.

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Section: Six-port In Metrologymentioning

confidence: 99%

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Koelpin

Lurz

Linz

et al. 2016

Sensors

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“…has a similar ambiguity range, but by building the difference of these two measured phases, a linear relationship being equivalent to the phase of 2r of fSpacing can be observed [24]. However, it has to be mentioned that this method has a problem with fast moving targets, because the oscillator generating the two frequencies needs a settling time between the two measurements and, in the meanwhile, the observed object should not move.…”

Section: Absolute Distance Measurement For Six-port Interferometersmentioning

confidence: 99%

Promise of a Better Position

et al. 2012

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I ndustrial automation today is an essential technology underlying our modern society. Advanced positioning and sensor feedback tasks in automation processes often require distance displacement detection, e.g., to measure and track the movement of robots. Furthermore, the detection of mechanical stress in complex industrial machinery through an accurate vibration analysis is often a task of major interest. Therefore, high-resolution distance measurements with short-and long-range positioning are important for a large number of sensing applications and can also be used as a precondition for vibrometer applications. Several automation technologies rely on high precision positioning sensors to track linear as well as rotational movements of various machinery. The tracked positioning information provided by the sensor interface determines the accuracy of the positioning system, thus the quality

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“…In addition, SDR-based combination of a FMCW (Frequency Modulated Continuous Wave) and CW radar frontend module was developed [9]. In this radar front-end module, the user can control the transmit waveform thorough a DDS (Direct Digital Synthesizer) chip for surveillance radar applications with precise range measurement requirements.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of 24 GHz Multichannel FMCW Surveillance Radar with a Software-Reconfigurable Baseband

2017

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We designed and developed a 24 GHz surveillance FMCW (Frequency Modulated Continuous Wave) radar with a softwarereconfigurable baseband. The developed radar system consists of transceiver, two selectable transmit antennas, eight parallel receive antennas, and a back-end module for data logging and to control the transceiver. The architecture of the developed radar system can support various waveforms, gain control of receive amplifiers, and allow the selection of two transmit antennas. To do this, we implemented the transceiver using a frequency synthesizer device and a two-step VGA (Variable Gain Amplifier) along with switch-controlled transmit antennas. To support high speed implementation features along with good flexibility, we developed a back-end module based on a FPGA (Field Programmable Gate Array) with a parallel architecture for the real-time data logging of the beat signals received from a multichannel 24 GHz transceiver. To verify the feasibility of the developed radar system, signal processing algorithms were implemented on a host PC. All measurements were carried out in an anechoic chamber to extract a 3D range-Doppler-angle map and target detections. We expect that the developed software-reconfigurable radar system will be useful in various surveillance applications.

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Software-Defined Six-Port Radar Technique for Precision Range Measurements

Cited by 30 publications

References 19 publications

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Promise of a Better Position

Design and Implementation of 24 GHz Multichannel FMCW Surveillance Radar with a Software-Reconfigurable Baseband

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