Extended Ellipse-based Reconstruction Algorithm for Six-port Radar

Linz, Sarah; Lurz, Fabian; Weigel, Robert; Koelpin, Alexander

doi:10.1109/rws.2019.8714294

Cited by 3 publications

(3 citation statements)

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“…Real radar systems, however, often suffer from phase and amplitude imbalances due to imperfect components and nonlinearities mainly in the RF circuit. This leads to stretched and shifted circles in the I/Q-plane and consequently decrease the measurement accuracy [60]- [62]. Due to this, many correction algorithms have been presented to map the elliptically stretched circled to a unit circle [60].…”

Section: F Signal Processingmentioning

confidence: 99%

“…Due to this, many correction algorithms have been presented to map the elliptically stretched circled to a unit circle [60]. This can be done in software [61], [62] or with the help of hardware components like phase shifters in the RF domain [63]. Each time the system is installed in a new scenario, this calibration has to be performed again.…”

Section: F Signal Processingmentioning

confidence: 99%

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Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

et al. 2021

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Radar sensors have been widely used to estimate speed and displacement of remote targets. A novel market for contactless radar sensing is emerging in the field of automatization and process analysis, where non destructive testing and evaluation methods are desired. Here, modern radar systems offer various advantages over conventional sensors since they enable the contactless, continuous, and cost-efficient measurement of static or dynamic ranges. These can further be used for vibration and vital sign characterization. Advances in microwave technology, an increasing integration density, and the development of novel algorithms keep boosting the performance of the systems. After introducing the most common operation principles, such as unmodulated and frequency-modulated continuous-wave radar, different design aspects and building blocks of cutting-edge systems are explained in detail. In the second part, selected applications are described in detail. These include the sheet thickness monitoring of metallic foils, and the measurement of the ground speed of vehicles with the latest approaches. Exemplary low-power radar systems are presented to show the limits in terms of power consumption while still offering a high measurement precision. In addition, the topics of mechanical vibration sensing and vital sign sensing are addressed by introducing tailored systems.INDEX TERMS Radar theory, radar remote sensing, Doppler radar, radar applications.

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Section: F Signal Processingmentioning

confidence: 99%

Section: F Signal Processingmentioning

confidence: 99%

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

et al. 2021

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“…The factor γ quantifies the sensitivity of each n-MOS mixer. For each of the four contributions I + , Iand Q + , Q -, the first of the two terms in relation (1) are rectified signals, while the last contains, in sinusoidal form, the signal of interest (amplitude and phase-shift) [7]- [8].…”

Section: Quadratic Detection Modementioning

confidence: 99%

Quadratic detection-based millimeter-wave MMIC for TDoA and AoA measurement

Bocquet

Loyez

Haddadi

2021

2021 International Conference on Electromagnetics in Advanced Applications (ICEAA)

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This paper presents a versatile topology of a monolithic microwave monolithic integrated circuit (MMIC) capable of performing multiple functionalities for next-generation wireless communications and geolocation devices. The architecture of this MMIC allows several modes of operation such as conventional frequency heterodyning for high-speed IQ modulation. In addition, the device can be configured in quadratic sensing mode to achieve optimal power added efficiency (PAE). The topology developed in the 65 nm FDSOI CMOS technology enables wideband V-band operation and combines vector accuracy for high data rates and phase state determination. The results presented concern 16QAM modulation schemes at data rates up to 2 Gbps as well as essential geolocation measurements such as Time Difference of Arrival (TDoA) and Angle of Arrival (AoA). The expected performance in terms of location accuracy is also presented.Index Terms -Monolithic microwave integrated circuit (MMIC); IQ modulation; Millimeter wave; Time Difference of arrival (TDoA); Angle of arrival (AoA).

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