Essays about: "signal propagation"

Showing result 6 - 10 of 117 essays containing the words signal propagation.

1. 6. Ray-tracing Based Investigations on the Deployment of RISs in Indoor Scenarios

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

   Author : Swaroop Divya Sai Prem Nambala; Dexin Kong; [2023]
   Keywords : Reconfigurable intelligent surface; RIS; optimization; Ray-tracing; Mixed integer linear programming MILP ; Complex impulse response; Wireless Insite.; Technology and Engineering;

   Abstract : Reconfigurable intelligence surface (RIS) is a promising candidate technology for future 6G wireless communication systems. In existing communication systems, the network operators are unable to control the propagation environment, which causes significant limitations on communication performance. READ MORE

3. 7. Comparative Analysis and Development of Receivers for Drone Remote Identification

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Xiaolinglong Guo; [2023]
   Keywords : drone detection; remote identification; field test; wireless receiver; drönardetektering; fjärridentifiering; fälttest; trådlös mottagare;

   Abstract : Similar to a car’s license plate, the European Union Aviation Safety Agency (EASA) has released new regulations imposing the registration of drone operators and the broadcasting of the drone’s “digital license plate”, i.e., the drone Remote Identification (RID) in flight, which gives a new opportunity in drone surveillance. READ MORE

4. 8. Surface Reconstruction using Multipath Propagation in Indoor MIMO Radar

   University essay from Lunds universitet/Matematisk statistik

   Author : Elias Olson; Jakob Henningsson; [2023]
   Keywords : Multiple-input multiple-output MIMO radar; multipath recognition; geometry reconstruction; Mathematics and Statistics;

   Abstract : Using active radar for localization in indoor environments is challenging. By signal reflection off walls and other static objects, false targets occur, referred to as multipath "ghosts". These are a significant hinder in interpreting the data. READ MORE

5. 9. Machine Learning-based MIMO Indoor Positioning

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

   Author : Qiyi Chen; [2023]
   Keywords : Technology and Engineering;

   Abstract : The most widely used positioning system is Global Navigation Satellite System (GNSS), which uses traditional positioning techniques and cannot achieve satisfactory positioning performance in indoor scenarios due to Non-Line-of-Sight (NLoS) transmission. Fingerprinting is a non-traditional positioning technique that is robust to NLoS transmission in indoor scenarios. READ MORE

6. 10. Trajectory Optimisation of a Spacecraft Swarm Maximising Gravitational Signal

   University essay from KTH/Optimeringslära och systemteori

   Author : Rasmus Maråk; [2023]
   Keywords : Spacecraft Swarms; Trajectory Optimisation; Impulsive Manoeuvres; Evolutionary Algorithms; Polyhedral Gravity Model; Small Body Exploration; Discrete Spherical Grids; Svärmande rymdfarkoster; Banoptimering; Impulsiva manövrar; Evolutionära Algoritmer; Polyhedral gravitationsmodell; Utforksning av små kroppar i solsystemet; Diskreta sfäriska rutnät;

   Abstract : Proper modelling of the gravitational fields of irregularly shaped asteroids and comets is an essential yet challenging part of any spacecraft visit and flyby to these bodies. Accurate density representations provide crucial information for proximity missions, which rely heavily on it to design safe and efficient trajectories. READ MORE