Portable High Resolution LFM-CW Radar Sensor in Millimeter-Wave Band

Almorox-González, P.; González-Partida, José-Tomás; Burgos-García, M.; Morena-Alvarez-Palencia, Cristina de la; Arche-Andradas, Lara; Dorta-Naranjo, B. Pablo

doi:10.1109/sensorcomm.2007.4394888

Cited by 24 publications

(14 citation statements)

References 5 publications

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“…Any cell migration produces a peak in the phase gradient. The magnirude of the phase jump produced by cell migration can be calculated using the second terms of (17) and (18). This yields 1.0354 rad when the cell migration is in the range direction and 0.7854 rad when the cell migration is in the Doppler dimensión.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The sensor used for the InISAR experiment is the interferometric evolution of the portable high-resolution millimetre-wave LFMCW radar previously described [18]. This evolution was possible because of the initial modular design of the radar.…”

Section: System Descriptionmentioning

confidence: 99%

“…As shown in the diagram, the sensor is a bistatic LFMCW interferometric radar formed by a signal generator, a transmitter block connected to the central antenna and two identical receiver chains formed by a receiving and IF block connected to the receiving antennas. All of the building blocks have been described in detail [18]. However, in the present configuration the IF blocks were replaced by low-pass filters, with cut-off frequencies at 4.5 MHz.…”

Section: System Descriptionmentioning

confidence: 99%

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Interferometric inverse synthetic aperture radar experiment using an interferometric linear frequency modulated continuous wave millimetre-wave radar

Felguera-Martin

González-Partida

Almorox-González

et al. 2011

IET Radar Sonar Navig.

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An interferometric linear frequency modulated continuous wave (LFMCW) millimetre-wave radar is presented, along with the results of an experiment conducted to srudy the feasibility of using it in a ñirure millimetre-wave interferometric inverse synthetic aperture radar (InISAR) system. First, a description of the radar is given. Then, the signal processing chain is described, with special attention to the phase unwrapping technique. The interferometric phase is obtained by unwrapping the prominent target's phase in each antenna using a sliding frame processing technique. Cell migration issues in this method are also addressed. Simulations were carried out to illustrate and assess the processing chain and to show the effects of multipath echoes on the height measurement. In the real experiment, the range, speed and height of a moving target were tracked over consecutive inverse synthetic aperture radar (ISAR) image frames, verifying the performance of the whole system.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: System Descriptionmentioning

confidence: 99%

Section: System Descriptionmentioning

confidence: 99%

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Interferometric inverse synthetic aperture radar experiment using an interferometric linear frequency modulated continuous wave millimetre-wave radar

Felguera-Martin

González-Partida

Almorox-González

et al. 2011

IET Radar Sonar Navig.

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“…Therefore, the leakage frequency does not interfere with the actual signals. Figure 7 shows the clutter signal in terms of range, which is afforded by converting the frequencies shown in Figure 6 into ground ranges using Equations (24) and (25). The lower range is selected based on the application's requirements, whilst the upper range is due to the inherent limitations of the digitizing equipment.…”

Section: Signal Pre-processingmentioning

confidence: 99%

A Circular Synthetic Aperture Radar for on-the-Ground Object Detection

Mohammadpoor¹,

Abdullah²,

Ismail³

et al. 2012

PIER

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Abstract-Detecting an on-the-ground object is a subject of interest for use in some applications. Foreign Object Detection (FOD), which is an important issue in aviation safety, is a possible application. In this way, radar imaging, has several inherent advantages over other on-the-ground object detection techniques. This paper will introduce a ground-based Circular Synthetic Aperture Radar, which detects and localizes various objects, based on their reflection properties of microwaves. Here, wideband Linear Frequency Modulated (LFM) chirp pulses are employed for the transmission and reception of reflection pulses, both to and from the object under test. Once the pulses are received by the radar, a processing algorithm (proposed later in this paper) is executed to confirm detection. In order to verify the validity of the model, a prototype was developed and a series of field experiments was carried out. The results show that the proposed system has the ability to detect and localize on-the-ground objects with dimensions as small as 2 cm high and 1 cm diameter, located several metres away. Furthermore, the resolution of the system was analysed and results indicate that the system is capable of distinguishing multiple objects in close proximity to each other, which therefore, makes it suitable for FOD applications by some small modifications.

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“…The MINISARA [4] from the Universidad Politécnica de Madrid is a portable SAR system with a center frequency of 34 GHz and a bandwidth of 2 GHz. The system is small (24 × 16 × 9 cm) and lightweight (2.5 kg).…”

Section: Fmcw Sar Systemsmentioning

confidence: 99%

Theory and Application of Motion Compensation for LFM-CW SAR

Zaugg

Long

2008

IEEE Trans. Geosci. Remote Sensing

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Abstract-Small low-cost high-resolution synthetic aperture radar (SAR) systems are made possible by using a linear frequency-modulated continuous-wave (LFM-CW) signal. SAR processing assumes that the sensor is moving in a straight line at a constant speed, but in actuality, an unmanned aerial vehicle (UAV) or airplane will often significantly deviate from this ideal. This nonideal motion can seriously degrade the SAR image quality. In a continuous-wave system, this motion happens during the radar pulse, which means that existing motion compensation techniques that approximate the position as constant over a pulse are limited for LFM-CW SAR. Small aircraft and UAVs are particularly susceptible to atmospheric turbulence, making the need for motion compensation even greater for SARs operating on these platforms. In this paper, the LFM-CW SAR signal model is presented, and processing algorithms are discussed. The effects of nonideal motion on the SAR signal are derived, and new methods for motion correction are developed, which correct for motion during the pulse. These new motion correction algorithms are verified with simulated data and with actual data collected using the Brigham Young University μSAR system.

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Portable High Resolution LFM-CW Radar Sensor in Millimeter-Wave Band

Cited by 24 publications

References 5 publications

Interferometric inverse synthetic aperture radar experiment using an interferometric linear frequency modulated continuous wave millimetre-wave radar

Interferometric inverse synthetic aperture radar experiment using an interferometric linear frequency modulated continuous wave millimetre-wave radar

A Circular Synthetic Aperture Radar for on-the-Ground Object Detection

Theory and Application of Motion Compensation for LFM-CW SAR

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