Essays about: "signal processing and wave propagation"

Showing result 1 - 5 of 6 essays containing the words signal processing and wave propagation.

1. 1. Extraction of Loudspeaker- and room impulse responses under overlapping conditions

   University essay from Uppsala universitet/Signaler och system

   Author : Felix Gustafsson; [2022]
   Keywords : Signal processing; Optimization; Acoustics; Dereverberation; Sparse deconvolution; Multipath propagation;

   Abstract : A loudspeaker is often considered to be a Linear Time Invariant (LTI) system, which can be completely categorized by its impulse response. What sets loudspeakers apart from other LTI-systems is the acoustical aspect including echoes, which makes it a lot harder to take accurate noise free measurements compared to other LTI-systems such as a simple RC circuit. READ MORE

3. 2. A Study on Data-driven Methods for Selection and Evaluation of Beam Subsets in 5G NR

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Nic Ekman; Ilias Theodoros Skordas; [2022]
   Keywords : 5G; NR; telecom; telecommunications; ML; machine learning; algorithms; beam; widebeam; propagation; beamforming; subset; RAN; radio; radio environment; ericsson; Technology and Engineering;

   Abstract : 5G New Radio is the next generation of mobile networks and it comes with promises of ultra-high speeds, ultra-high reliability and ultra-low latency. This has posed a challenge for the engineers entrusted with the task of finding solutions which could fulfil the specification, and as a result, some promising areas have received increased attention in recent years. READ MORE

4. 3. Simulation and Analysis of Ultrasonic Wave Propagation in Pre-stressed Screws

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Erik Andrén; [2019]
   Keywords : ;

   Abstract : The use of ultrasound to measure preload in screws and bolts has been studied quite frequently the last decades. The technique is based on establishing a relationship between preload and change in time of flight (TOF) for an ultrasonic pulse propagating back and forth through a screw. READ MORE

5. 4. Induction in Printed Circuit Boards using Magnetic Near-Field Transmissions

   University essay from Linköpings universitet/Teoretisk Fysik

   Author : Simon Arkeholt; [2018]
   Keywords : Electromagnetic fields; wave propagation; near-field; VLF range; PCB induction; NFMI system; inductive coupling;

   Abstract : In 1865 Maxwell outlined the theoretical framework for electromagnetic field propagation. Since then many important developments have been made in the field, with an emphasis on systems using high frequencies for long-range interactions. READ MORE

6. 5. Analysis of Channel Measurements Using a Very Large Antenna Array

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Tomas Sidabras; Mohammad Salman; [2015]
   Keywords : channel measurements; very large antenna array; massive MIMO; channel modeling; Technology and Engineering;

   Abstract : Accurate wireless channel models are crucial to simulate the effect of radio wave propagation in a channel on wireless communication systems. By calculating physical processing effects that signal undergoes while traveling from transmitter to the receiver, channel models help to analyze performance of wireless systems. READ MORE