Sökning: "Pilot"
Visar resultat 21 - 25 av 1024 avhandlingar innehållade ordet Pilot.
21. Channel Estimation Aspects of Reconfigurable Intelligent Surfaces
Sammanfattning : In the sixth generation of wireless communication systems (6G), there exist multiple candidate enabling technologies that help the wireless network satisfy the ever-increasing demand for speed, coverage, reliability, and mobility. Among these technologies, reconfigurable intelligent surfaces (RISs) extend the coverage of a wireless network into dead zones, increase capacity, and facilitate integrated sensing and communications tasks by consuming very low power, thus contributing to energy efficiency as well. LÄS MER
22. Pilot power management in radio network planning for WCDMA networks
Sammanfattning : The high price of auction-based 3G licences and the growing competition in telecommunications market is putting enormous pressure on manufacturers and operators to configure the next-generation mobile network in the most cost-effective way possible providing high quality 3G services. Therefore, aiming to improve overall network performance and to ensure efficient utilization of network resources, radio network planning and optimization became even more important thar. LÄS MER
23. Experimental Investigations on Natural Gas-Diesel Dual Fuel Combustion
Sammanfattning : Natural gas has been traditionally applied in spark-ignited combustion engines due to similar combustion characteristics for methane gas and gasoline. However, spark ignition requires a low compression ratio to avoid knock problems and therefore, gas engines have lower efficiency than diesel engines. LÄS MER
24. High Spectral Efficiency Fiber-Optic Transmission Systems Using Pilot Tones
Sammanfattning : Modern fiber-optic communication systems combine state-of-the-art components with powerful digital signal processing (DSP) to maximize the system spectral efficiency (SE). Systems rely on wavelength-division multiplexing, including superchannel transmission, to enable transmission over the available bandwidth which reaches about 10 THz when accounting for the so-called C and L bands. LÄS MER
25. Pharmaceuticals – improved removal from municipal wastewater and their occurrence in the Baltic Sea
Sammanfattning : Pharmaceutical residues are found in the environment due to extensive use in human and veterinary medicine. The active pharmaceutical ingredients (APIs) have a potential impact in non-target organisms. Municipal wastewater treatment plants (WWTPs) are not designed to remove APIs. LÄS MER