Sökning: "Elektroteknik och elektronik Signalbehandling"
Visar resultat 11 - 15 av 646 avhandlingar innehållade orden Elektroteknik och elektronik Signalbehandling.
11. High-End Performance with Low-End Hardware : Analysis of Massive MIMO Base Station Transceivers
Sammanfattning : Massive MIMO (multiple-input–multiple-output) is a multi-antenna technology for cellular wireless communication, where the base station uses a large number of individually controllable antennas to multiplex users spatially. This technology can provide a high spectral efficiency. LÄS MER
12. Aspects of Power Allocation in Massive MIMO
Sammanfattning : The past decades have seen a rapid growth of mobile data trac, both in terms of connected devices and data rate. To satisfy the ever growing data trac demand in wireless communication systems, the current cellular systems have to be redesigned to increase both spectral eciency and energy eciency. LÄS MER
13. Pulse-Width Modulated RF Transmitters
Sammanfattning : The market for wireless portable devices has grown signicantly over the recent years.Wireless devices with ever-increased functionality require high rate data transmissionand reduced costs. LÄS MER
14. Measurement Techniques for Characterization of Power Amplifiers
Sammanfattning : In this thesis a sampling time domain measurement system primarily intended for measurements on radio frequency power amplifiers is discussed. The need for such a measurement system is established. Impairments due to non-ideal measurement instruments are discussed as well as methods to compensate for these impairments. LÄS MER
15. Energy-Efficient Data Converters for Low-Power Sensors
Sammanfattning : Wireless sensor networks (WSNs) are employed in many applications, such as for monitoring bio-potential signals and environmental information. These applications require high-resolution (> 12-bit) analog-to-digital converters (ADCs) at low-sampling rates (several kS/s). LÄS MER