List of PhD and Lic. Theses | Signals and Systems, Uppsala University.
Imaging technique with high-sensitivity and high-spatial-resolution at single molecular level is always a desired aspect to the researchers. In association with scanning probe microscopy and surface-enhanced Raman spectroscopy Road traffic congestion is a major issue in most mega cities.
The traffic jams are often exacerbated by drivers habitually following the same routes. A real-time, optimum vehicle routing system that takes traffic density Wi-Fi, also spelled Wifi or WiFi, is a popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves. WiFi has a lot of advantages, they are easy to set up and In the last few years, there has been an immense influence of wireless networks in our daily life.
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- Power Optimization in Wireless Communication Systems.
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Especially, wireless mesh network has got a prominent attention in academic research and commercial deployment as well. A power inverter or inverter is an electrical power converter that changes direct current DC to alternating current AC. The converted AC can be at any required voltage and frequency with appropriate transformer, switching Power Factor, the ratio between the real power and the apparent power forms a very essential parameter in power system.
It is indicative of how effectively the real power of the system has been utilized. With rapid In this thesis, a recursive algorithm based on kernel mapping is applied to develop an automated, ICU Signaling. The method is portable and adaptive, and has lower complexity.
Streams of different medical parameters are Visible light communication VLC systems have become promising candidates to complement conventional radio frequency RF systems due to the increasingly saturated RF band and the potentially high data rates that can be achieved by VLC systems. Over the last decade, significant research effort has been directed towards the development of VLC systems due to their numerous advantages over RF systems, such as the availability of simple transmitters light emitting diodes, LEDs and receivers silicon photo detectors , better security at the physical layer, improved energy efficiency due to the dual functionally i.
However, there are several challenges facing VLC systems to achieve high data rates multi gigabits per second. These challenges include the low modulation bandwidth of the LEDs, co-channel interference CCI , inter symbol interference ISI due to multipath propagation and the light unit i. This thesis investigates a number of techniques to overcome these challenges to design a robust high-speed indoor VLC system with full mobility.
Underwater optical communication systems
The main goal of using LD is to enable the VLC system to achieve multi-gigabits data rates when employing a simple modulation technique such as on-off keying OOK , thus adding simplicity to the VLC system. As well as modelling in two different room scenarios: an empty room and a realistic environment were considered.
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Furthermore, a new high-speed fast adaptive VLC system based on a divide-and-conquer methodology is proposed and integrated with the system to reduce the time required to identify the optimum hologram. This thesis also proposes four new infrared IR systems to support VLC systems when the light is totally turned off. An adaptive rate technique ART is proposed to mitigate the impact of light dimming.
Finally, an IROW system cluster distributed with beam steering is introduced to collaborate with a VLC system to maintain the target data rate in the case of partial dimming.