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Energy-detection (ED) receivers can take advantage of the ranging and multipath resistance capabilities of impulse-radio ultra-wideband (IR-UWB) physical layers at a much lower complexity than coherent receivers. However, ED receivers are extremely vulnera ...
Institute of Electrical and Electronics Engineers2011
In this thesis we study Impulse-Radio Ultra-Wide Band (IR-UWB), a physical layer radio technology offering many features that make it a promising choice for future short-range wireless networks. The challenges in such networks are many, ranging from the co ...
We advocate a compressed sensing strategy that consists of multiplying the signal of interest by a wide bandwidth modulation before projection onto randomly selected vectors of an orthonormal basis. Firstly, in a digital setting with random modulation, con ...
Institute of Electrical and Electronics Engineers2012
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Stationary and localized Brillouin dynamic gratings are generated using phase modulation of both pump waves by a pseudo-random bit sequence. The gratings are applied to long variable delay of pulses and to cm-level distributed sensing ...
Optical Society of America2012
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A wearable device to power implanted sensors by means of an inductive link is presented. The system, having size 69 × 40 mm2, is designed to be embedded into a skin patch and located over the implantation area. The system can transfer up to 15 mW within 6 ...
Ieee2012
This thesis addresses the security of two fundamental elements of wireless networking: neighbor discovery and ranging. Neighbor discovery consists in discovering devices available for direct communication or in physical proximity. Ranging, or distance boun ...
EPFL2011
This thesis evaluates the potential of Ultra Wideband Impulse Radio for wireless sensor network applications. Wireless sensor networks are collections of small electronic devices composed of one or more sensors to acquire information on their environment, ...
EPFL2010
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The spectral broadening of the pump pulse through self phase modulation in a time domain distributed Brillouin sensor is demonstrated to have a non-negligible detrimental effect, leading to a doubling of the effective gain linewidth after some 20 km in sta ...
The International Society for Optical Engineering2010
This paper describes a low power Ultra-Wideband Impulse Radio (UWB-IR) Application Specific Integrated Circuit (ASIC) transmitter implemented in UMC 0.18 μm. This transmitter has been designed for low data rate communication applications and indoor positio ...
An innovative readout channel, based on analog amplitude modulation of the signals recorded by each sensing site, is developed for high-density CMOS-based microelectrode arrays. A single amplification stage simultaneously records the neural activity acquir ...
