Sökning: "Impulse noise"
Visar resultat 1 - 5 av 46 avhandlingar innehållade orden Impulse noise.
1. Impulse noise and brain injury. An experimental study in rats
Sammanfattning : Abstract. Pressure waves, experienced as impulse noise, affect many body organs, although most attention has been paid to the inner ear. Impulse noise is produced by e.g. LÄS MER
2. Millimeter-Wave Impulse Radio
Sammanfattning : This thesis investigates the opportunity of wireless multi-gigabit per second communication at the millimeter-wave (mmW) frequencies around 60 GHz by using impulse radio and nanoelectronics. Today most wireless communication take place in the microwave region, where several different systems and applications are crowding the narrow-band channels. LÄS MER
3. Assessment of experimental neurotrauma
Sammanfattning : Model systems of closed head injury are designed to replicate aspects of traumatic brain injury, ischemia and epilepsy in man. The aim of this thesis was to (1) develop sensitive systems enabling analyses of the biochemical reactions, as reflected by leakage of marker compounds to the cerebrospinal fluid (CSF); and (2) develop and assess a new model for closed head injury and associated dynamic changes in the brain cell. LÄS MER
4. Sub-Nyquist Sampling Impulse Radio UWB Receivers for the Internet-of-Things
Sammanfattning : In the era of Internet-of-Things, the demand for short range wireless links featured by low-power and low-cost, robust communication and high-precision positioning is growing rapidly. Impulse Radio Ultra-Wideband (IR-UWB) technology characterized by the transmission of sub-nanosecond pulses spanning up to several GHz band with extremely low power spectral density emerges as a promising candidate. LÄS MER
5. Oscillator design in III-V technologies
Sammanfattning : The thesis treats the design of low phase noise oscillators/VCOs in GaAs/InGaP HBT and GaN HEMT technologies. The covered topics are: active device modeling, noise characterization, passive structures, phase noise models, simulation/measurement tools, circuit topologies, and design techniques. LÄS MER