Sökning: "non-linear channels"
Visar resultat 1 - 5 av 29 avhandlingar innehållade orden non-linear channels.
1. Non-linear Spectroscopy of Conical Intersections
Sammanfattning : Conical Intersections (CIs) in a molecule originate from the breakdown of the Born-Oppenheimer approximation when electronic states come close in energy. Ultrafast non-radiative decay channels open up in the vicinity of a CI, thus funneling a molecule from one electronic state to another. LÄS MER
2. Nuclear Dynamics in Linear and Non-linear X-ray Processes
Sammanfattning : New generations of brilliant synchrotron radiation sources and intense X-ray and optical lasers have opened unprecedent opportunities in linear and non-linear spectroscopies of molecules. This together with new instrumentation calls for further development of theory to explain observations and suggest new experiments. LÄS MER
3. Spectrally Efficient Continuous Phase Modulation
Sammanfattning : Spectrally efficient continuous phase modulation (CPM) systems and generalizations of CPM for wireless links are considered. Continuous phase modulation defines constant envelope phase codes, which are advantageous when using non-linear amplifiers. LÄS MER
4. Non-linear synaptic integration on dendrites of striatal medium-spiny neuron : a computational study
Sammanfattning : Striatum is the main input nucleus of basal ganglia. Medium-spiny neurons (MSNs), the principal neurons of the striatum, receive convergent excitatory inputs from cortex and thalamus, thus “gate” the information flow to the basal ganglia. LÄS MER
5. On MIMO Systems and Adaptive Arrays for Wireless Communication : Analysis and Practical Aspects
Sammanfattning : This thesis is concerned with the use of multiple antenna elements in wireless communication over frequency non-selective radio channels. Both measurement results and theoretical analysis are presented. New transmit strategies are derived and compared to existing transmit strategies, such as beamforming and space-time block coding (STBC). LÄS MER