Essays about: "high frequency sampled"

Showing result 1 - 5 of 23 essays containing the words high frequency sampled.

  1. 1. Using search based methods for beamforming

    University essay from Uppsala universitet/Avdelningen för systemteknik

    Author : Adam Bergman Karlsson; [2024]
    Keywords : Beamforming; Artificial Intelligence; AlphaZero; Radio Resource Management; Monte Carlo Tree Search;

    Abstract : In accommodating the growing global demand for wireless, Multi-User Multiple-Input and Multiple-Output (MU-MIMO) systems have been identified as the key technology. In such systems, a transmitting basestation serves several users simultaneously, increasing the network capacity. READ MORE

  3. 2. Towards a setup for narrowband terahertz generation through difference-frequency mixing of chirped ultrashort pulses

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Isa Clementsson; [2023]
    Keywords : Physics and Astronomy;

    Abstract : Terahertz radiation is a useful tool for inducing lower-energy excitations in matter, where it can be used to cause structural changes through direct interaction with the crystal lattice. Sub-picosecond optical pulses can be used to generate intense broadband terahertz pulses through optical rectification in nonlinear crystals, reaching peak electric fields of several MV/m and conversion efficiencies as high as a few percent. READ MORE

  4. 3. Nowcasting U.S. inflation using mixed frequency real-time data

    University essay from Lunds universitet/Matematisk statistik

    Author : Gustaf Lundgren; Nils Wicktor; [2023]
    Keywords : Inflation; Machine Learning; Nowcasting; MIDAS; Almon distributed lag models; Real-Time data; Random Forest; XGBoost; Mathematics and Statistics;

    Abstract : Different models were developed with the aim of nowcasting inflation at a daily basis with high frequency variables, while using real-time data to avoid look ahead bias. Both popular machine learning models such as Random Forest and XGBoost, and more traditional models such as UMIDAS and Almon distributed lag models were used to make the nowcasts. READ MORE

  5. 4. Influence of forest mires on wildfire : a landscape analysis of the 2014 Västmanland forest fire

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Andreas Souropetsis; [2022]
    Keywords : Forest fire; Mires fuel composition; Aerial photo interpretation;

    Abstract : Forest fire is a major natural disturbance that influence forest ecosystem structure and composition at both the stand and landscape level. In boreal Fennoscandia fire frequency has been very low over the last c.150 years due to effective fire suppression, although occasionally high-intensity fires escape initial attack and grow big. READ MORE

  6. 5. Sensor fusion between positioning system and mixed reality

    University essay from Linköpings universitet/Tekniska fakulteten; Linköpings universitet/Institutionen för datavetenskap

    Author : Anton Lifwergren; Jonsson Jonatan; [2022]
    Keywords : Sensor Fusion; MR; Mixed Reality; AR; Augmented Reality; Positioning; Local Positioning System; Transformation; Mining; Sensorfusion; MR; Mixed Reality; AR; Augmented Reality; Lokalt Positionerings System; Positionering; Transformation; Gruva;

    Abstract : In situations where we want to use mixed reality systems over larger areas, it is necessary for these systems to maintain a correct orientation with respect to the real world. A solution for synchronizing the mixed reality and the real world over time is therefore essential to provide a good user experience. READ MORE