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iFURTHER Project - A Cognitive Network of HF Radars for Europe Defence
Stéphane Saillant;Dominik Bok;Jean-Philippe Molinié;Apostolos Leventis;Piotr Samczynski;Philippe Brouard;Anna Lisa Saverino;Amerigo Capria;Yoann Paichard
2023 IEEE International Radar Conference (RADAR)
Year: 2023 | Conference Paper |
Cited by: Papers (4)
This paper presents the European project named iFURTHER that focuses on multi-site HF-OTH-R approaches. Facing the new military threats, the European Union seeks to develop disruptive defence systems that benefit from a new robust capability to complement existing surveillance systems. The iFURTHER project conceptualises the idea of a cognitive network of HF radars over Europe that provides the ca...Show More
Prototyping a Radar Sensor based on a Xilinx RFSoC Device for Detect-And-Avoid onboard Small UAV
Valentine Wasik;Laurent Casadebaig;Benjamin Gabard;Benjamin Gigleux;Loïc Castanet;Yoann Paichard;Hervé Jeuland
2023 20th European Radar Conference (EuRAD)
Year: 2023 | Conference Paper |
This paper presents the development of an experimental radar payload by ONERA, onboard a small multirotor Unmanned Aerial Vehicle (UAV). The objective is to detect aerial targets for autonomous Detect-And-Avoid (DAA) purposes. The payload design combines low cost modular RF architecture with digital back-end based on the new FPGA RFSoC technologies from Xilinx. Experimental trials have been conduc...Show More
Time-Lapse Imaging of Human Heart Motion With Switched Array UWB Radar
Sverre Brovoll;Tor Berger;Yoann Paichard;Øyvind Aardal;Tor Sverre Lande;Svein-Erik Hamran
Radar systems for detection of human heartbeats have mostly been single-channel systems with limited spatial resolution. In this paper, a radar system for ultra-wideband (UWB) imaging of the human heart is presented. To make the radar waves penetrate the human tissue the antenna is placed very close to the body. The antenna is an array with eight elements, and an antenna switch system connects the...Show More
This paper presents the design of an X-band 8×8 digital array radar antenna with aperture-coupled stacked patch antenna elements. The use of a resonant aperture and stacked patches resulted in a -10 dB reflection coefficient bandwidth of 7.6-12.8 GHz (51%). Scan angles up to ±80 have been achieved for certain frequencies and ±55 for a frequency band of 8-8.50 GHz. The array has been built using lo...Show More
Time-lapse imaging of human heartbeats using UWB radar
Sverre Brovoll;Tor Berger;Yoann Paichard;Øyvind Aardal;Tor Sverre Lande;Svein-Erik Hamran
2013 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Year: 2013 | Conference Paper |
Cited by: Papers (11)
Radar systems for detection of human heartbeats have mostly been single-channel systems with limited spatial resolution. In this paper, a radar for ultra-wideband (UWB) imaging of dynamic reflectors inside the human body is presented. To make the radar waves penetrate the human tissue a body-contact antenna is used. The antenna is an array with eight elements, and an antenna switch system connects...Show More
Optimal frequency range for medical radar measurements of human heartbeats using body-contact radar
Sverre Brovoll;Øyvind Aardal;Yoann Paichard;Tor Berger;Tor Sverre Lande;Svein-Erik Hamran
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2013 | Conference Paper |
Cited by: Papers (9)
In this paper the optimal frequency range for heartbeat measurements using body-contact radar is experimentally evaluated. A Body-contact radar senses electromagnetic waves that have penetrated the human body, but the range of frequencies that can be used are limited by the electric properties of the human tissue. The optimal frequency range is an important property needed for the design of body-c...Show More
Detecting changes in the human heartbeat with on-body radar
Øyvind Aardal;Sverre Brovoll;Yoann Paichard;Tor Berger;Tor Sverre Lande;Svein-Erik Hamran
2013 IEEE Radar Conference (RadarCon13)
Year: 2013 | Conference Paper |
Radar can be used to detect human heartbeats. This makes radar a potential alternative to today's heartbeat monitoring techniques in medicine. In this paper, two antennas were located on the chest to monitor the heart activity. Simultaneous with the radar measurements, the Electrocardiogram (ECG) and blood pressure were measured. Details of the heart activity, such as opening and closing of heart ...Show More
Physical Working Principles of Medical Radar
Øyvind Aardal;Yoann Paichard;Sverre Brovoll;Tor Berger;Tor Sverre Lande;Svein-Erik Hamran
There has been research interest in using radar for contactless measurements of the human heartbeat for several years. While many systems have been demonstrated, not much attention have been given to the actual physical causes of why this work. The consensus seems to be that the radar senses small body movements correlated with heartbeats, but whether only the movements of the body surface or refl...Show More
Chest movement estimation from radar modulation caused by heartbeats
Øyvind Aardal;Svein-Erik Hamran;Tor Berger;Yoann Paichard;Tor Sverre Lande
2011 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Year: 2011 | Conference Paper |
Cited by: Papers (15)
Heartbeats can be measured at a distance using radar to record the chest movements. The physiological motion appear as modulations in both phase and amplitude in the radar recording. In this paper, a single reflector model of the heartbeat is used to estimate the chest motion and find the movement in millimeters. Experimental results from 10-18GHz measurements are presented, and the validity of th...Show More
This paper presents a prototype passive radar system that utilises FM radio transmitters for target detection. The system is based on the Universal Software Radio Peripheral (USRP) hardware platform and the opensource GNURadio software-defined radio (SDR) toolkit. The hardware components that were required to implement the passive radar receiver are introduced. The signal processing software that ...Show More
A new probabilistic data association filter based on composite expanding and fading memory polynomial filters
Roaldje Nadjiasngar;Michael Inggs;Yoann Paichard;Norman Morrison
This paper presents the use of composite expanding and fading memory polynomial filters performing tracking in conditions of heavy clutter and low probability of detection. The composite expanding and fading memory polynomial filters are modified to incorporate probabilistic data association, and a simulation study shows that this new type of filtering offers performance comparable to the linear K...Show More
The prediction of radar coverage as a function of the position of the radar has always been a key step in radar network planning. In the past, simple geometric models backed up by the deployment of siting radars were the only options for potential site evaluation, but the development of sophisticated propagation models (e.g. AREPS [1]) has moved the technology forward to another level of predictio...Show More
In this paper, the benefits of OFDM waveforms are analyzed for multistatic radar systems, where several radar stations cooperate in the same frequency band. The signal is coded over a 2D pattern, in the time and the frequency domains, using orthogonal Golay complementary sets derived from Reed-Muller codes. Binary data are also encoded in the signal. The obtained ambiguity and cross-ambiguity func...Show More
Null placement in a circular antenna array for Passive Coherent Location systems
Pei-Hung Evan Tsai;Kaathima Ebrahim;Gunther Lange;Yoann Paichard;Michael Inggs
Passive Coherent Radar (PCL) is heavily constrained by the level of direct signal illumination. This paper investigates null steering techniques for a circular array antenna. An 8-element circular array has been designed and a method is proposed to steer multiple nulls in different directions. We present computed performance for two nulls achieved simultaneously. An 8 element dipole array has been...Show More
In a previous paper we mentioned that Passive Coherent Location (PCL) can be thought of as Cognitive Radar. The deployment of PCL systems (also known as Passive Bistatic Radar-PBR) is fraught with difficulty, even in the situation of a spatially static network of transmitters and receivers. It is well known that PCL systems have to take into account the strong, direct signals of cooperative and op...Show More
Signal level Simulator for netted text radar waveforms evaluation
When evaluating the performances of radar waveforms, it is crucial to understand how the signal is affected by multiple interactions with the environment and the system hardware. Analysis of complex radar systems, such as multistatic and netted designs (see Figure 1) is often intractable without the application of a dedicated radar simulation system. Recent research into radar simulation has focus...Show More
Passive Coherent Location system planning tool
2009 International Radar Conference "Surveillance for a Safer World" (RADAR 2009)
Year: 2009 | Conference Paper |
Cited by: Papers (1)
This paper describes a method of modelling the performance of a Passive Coherent Location (PCL) system, utilizing a rigorous propagation model. The model allows for spatial and frequency diversity of the network of receivers and transmitters implementing a proposed Passive Coherent Location system. The modelling includes the important calculation of Signal to Interference ratio, a major limitation...Show More
Performance analysis for MIMO MC-CDMA systems with imperfect channel estimation
2009 International Conference on Wireless Communications & Signal Processing
Year: 2009 | Conference Paper |
Cited by: Papers (3)
An accurate, closed-form expression for the bit error rate (BER) of the space-time block coding (STBC) multicarrier code-division multiple-access (MC-CDMA) system with imperfect channel estimation is derived by using moment generating functions (MGF), and the accuracy of which is verified by computer simulations. In this paper, the effect of errors in the channel estimation on the transmit diversi...Show More
Multistatic Passive Coherent Location radar systems
2009 European Radar Conference (EuRAD)
Year: 2009 | Conference Paper |
The use of signals of opportunity such as television or radio signals to detect and track targets has cyclically entered and left technology fashion. However, due to high constraints in the receiver design, and the signal processing implementation in real time, operational systems have appeared only recently. This paper present a multistatic passive coherent location (PCL) system, where the signal...Show More
Orthogonal multicarrier phased coded signal for netted radar systems
2009 International Waveform Diversity and Design Conference
Year: 2009 | Conference Paper |
Cited by: Papers (10)
Orthogonal multicarrier radar waveforms have been designed for netted radar systems, where several radar stations are active simultaneously. The waveforms are phase-coded using orthogonal Golay complementary sets, derived from Reed Muller codes. These codes constrain the PMEPR of the signal to a maximum a 3 dB. Besides, ambiguity functions and cross-ambiguity functions with low sidelobes have been...Show More
A signal level simulator for netted radar waveforms evaluation
2009 International Waveform Diversity and Design Conference
Year: 2009 | Conference Paper |
Cited by: Papers (1)
When evaluating the performances of radar waveforms, it is crucial to understand how the signal is affected by multiple interactions with the environment and the system hardware. Analysis of complex radar systems, such as multistatic and netted designs (see Fig. 1) is often intractable without the application of a dedicated radar simulation system. Recent research into radar simulation has focused...Show More
HYCAM: A RCS Measurement and Analysis System for Time-Varying Targets
Yoann Paichard;Juan Carlos Castelli;Philippe Dreuillet;Gerard Bobillot
2006 IEEE Instrumentation and Measurement Technology Conference Proceedings
Year: 2006 | Conference Paper |
Cited by: Papers (16)
The measurement of the radar cross section (RCS) of time-varying targets, which variation of reflectivity are caused by geometrical or radioelectrical deformations has to tackle sever constraints. Indeed the measurement time must be short enough so that the phenomenon under study can be considered as stationary. Besides, the frequency bandwidth of the system has to be wide enough for a fine analys...Show More
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