Optimization criteria in the design of medical UWB radars in compliance with the regulatory masks

Staderini, Enrico M.; Varotto, G.

doi:10.1109/biocas.2007.4463307

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…In this way the same pulse is used to control the sampling in the chain of reception. Finally, a low-pass filter averages the signal with a suitable time-constant [7] [8].…”

Section: Description Of Uwb Radar Systemsmentioning

confidence: 99%

Receiver design for UWB communications

Werfelli

Chaoui

Lahiani

et al. 2014

2014 1st International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)

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The Ultra Wide Band (UWB) is a technical of radio transmission which consists of using signals whose spectrum is spread out over a broad frequency band, typically ranging from MHz to several GHz frequencies. It was at first used for radar applications then applied in telecommunication applications, thus arousing a growing interest within the academic and industrial community.In a UWB radar system, the transmitter generates a sequence of short pulses with duration of the order of hundreds of picoseconds. These pulses excite the antenna and are radiated in space; then, the pulses are reflected by the target. The reflected pulse arrives to the same or another antenna and, if the target moves, the system is able to detect this movement from the changing in the arrival time of the received signal.The present work is concerned with a research on UWB as a new technology. This paper focuses on the design of a receiver system with ultra wide band using the tool of modelling Agilent Advanced Design System.

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“…In this way the same pulse is used to control the sampling in the chain of reception. Finally, a low-pass filter averages the signal with a suitable time-constant [7] [8].…”

Section: Description Of Uwb Radar Systemsmentioning

confidence: 99%

Receiver design for UWB communications

Werfelli

Chaoui

Lahiani

et al. 2014

2014 1st International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)

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“…Collecting the range values at different instants and processing them, it is possible to rebuilt the dynamic motion of the target (i.e. the heart, in case of Heart Rate Monitoring) [8].…”

Section: Pulse Radarmentioning

confidence: 99%

“…Pulsed UWB radar has been considered to sense the movement of body since it meets the resolution requirements [7][8][9].…”

mentioning

confidence: 99%

FM-UWB for Communications and Radar in Medical Applications

Cianca

Gupta

2009

Wireless Pers Commun

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UWB technology is a useful and safe new technology in the area of wireless body area network. There are many advantages of using UWB as a communication standard for biomedical applications. Due to very low radiated power (−41.3 dBm/MHz), low power consumption, good coexistence with the other existing instruments, Robustness to interference and multipath. Moreover, one specific UWB technology, namely Frequency Modulated (FM)-UWB, has also an important advantage, which make it even more convenient for medical applications, such as simple low cost design (FM, no receive LO, no carrier synchronization as in IR-UWB). UWB technology has been also proposed radar applications such as: Non-Invasive Heart and Respiration Rate Monitoring; Detection of Cardiac Arrhythmias; Detection of Pathological Respiratory Patterns, particularly in Sudden Infant Death Syndrome (SIDS) and Sleep Apnea; Multi-Patient Monitoring; Detection and Non-Invasive Imaging of Breast Tumors. However, pulsed radar are mainly used for these applications. The main issue that is addressed in this paper is the integration of sensing and communication using FM-UWB and radar technology so that a single device can be obtained for two different operational mode. We have show that FM-UWB as radar can meet the requirements of typical biomedical applications such as Non-Invasive Heart and Respiration Rate Monitoring. Advantages and challenges of this integration are shown. Future perspectives of this novel activity will be drawn.

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“…This model presents the Fourier coefficients in closedform for a transmitted periodic pulse waveform and a single chest interface, assumed to be planar and displace according to the periodic lungs and heart motion. The resulting expressions constitute a tool that other researchers can use to analyze any periodic transmit waveform, e.g., periodic pseudo-random binary sequences [32], any periodic displacement pattern of the interface, and any planar multi-layered reflecting interface by applying well-known Fourier techniques. The model exposes the effects of aliasing and of different heart and lung displacement patterns.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Spectral Analysis of the Ir-Uwb Radar Chest Reflection With Arbitrary Periodic Breathing- And Heart-Induced Displacements

Nguyễn¹,

Weitnauer²

2016

PIER B

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Abstract-The moving chest wall imparts a delay modulation onto the reflected IR-UWB radar signal, making the radar return a nonlinear function of chest wall displacement. Existing theoretical spectral models of the IR-UWB radar reflections from the human chest wall have restrictive assumptions that preclude realistic modeling of chest wall displacement and assume an aliased version of the radar signal. This paper presents novel theoretical analysis of the un-aliased spectrum, without the restrictive assumptions. Potential applications not specifically treated in this paper, but illustrative of the novelty and broader scope of the presented analysis, include heart-induced displacements that are realistically more bursty in nature and breathing-induced displacements consistent with, for example, non-unity inspiration-to-expiration ratios characteristic of asthma; neither of these could be analyzed using previous models. As well known, the un-aliased spectrum cannot generally be recovered from the aliased spectrum. In particular, the paper shows that the clusters of the non-aliased spectrum are not just scaled versions of each other; rather they have complex variations that if measurable, could enable estimation of parameters such as displacement amplitude; such variations are not apparent in the existing aliased spectrum model, which has just one cluster. This paper analyzes the degree to which the aliased model differs from the non-aliased model. The paper also addresses some practical aspects of the spectral model, such as the number of significant components in a spectral cluster and computational complexity of the theoretical model.

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Optimization criteria in the design of medical UWB radars in compliance with the regulatory masks

Cited by 10 publications

References 7 publications

Receiver design for UWB communications

Receiver design for UWB communications

FM-UWB for Communications and Radar in Medical Applications

Theoretical Spectral Analysis of the Ir-Uwb Radar Chest Reflection With Arbitrary Periodic Breathing- And Heart-Induced Displacements

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