Essays about: "DOPPLER"

Showing result 21 - 25 of 106 essays containing the word DOPPLER.

1. 21. Comparison of intensified turbulence events in the Baltic Sea

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Linnéa Hallgren; [2021]
   Keywords : turbulence; upper ocean; ocean mixing; parameterization;

   Abstract : Turbulence is important since it affects the exchange of momentum, heat, and trace gases between the atmosphere and the ocean. However, measuring oceanic turbulence is not straightforward and that is why parameterizations that describe turbulence events are important. READ MORE

3. 22. FMCW mmWave Radar for Detection of Pulse, Breathing and Fall within Home Care

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

   Author : Axel Trange; [2021]
   Keywords : ;

   Abstract : Countless of elderly people fall and get hurt within their homes, worldwide, every year, and as they can not always reach out for help themselves, they end up helplessly waiting for someone to notice what has occurred. Throughout this work, it is investigated if remote sensing of the mmWave FMCW radar IWR6843AOPEVM can be adopted to detect the incident of falls, and also detect the vital signs of the human subject. READ MORE

4. 23. Waveform agility for robust radar detection and jamming mitigation

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Karl-Johan Hällgren; [2021]
   Keywords : radar; electronic warfare; jamming; jamming resistance; waveforms; phase codes; MIMO; radar; telekrig; störning; störskydd; vågformer; faskoder; MIMO;

   Abstract : In this report metrics for jamming resistance and radar performance of waveform sets are described and developed, and different sets of waveforms are optimized, evaluated and compared. It is shown that without additional processing or PRI jitter, waveform sets can reach jamming resistance a few dB worse than what is provided by PRI jitter alone, and together with PRI jitter a few dB better. READ MORE

5. 24. Characterisation of Low-Level Jets and their Influence on Low-Level Clouds over the Baltic Sea; Östergarnsholm Observatory, Sweden

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

   Author : Johan Lundberg; [2021]
   Keywords : Low-level jets; Low-level clouds; LLJs; LLCs; Boundary layer; ABL; CBH; Lidar; Ceilometer; Turbulent intensity; Physics and Astronomy;

   Abstract : In this study, about two years of data from Östergarnsholm in the Baltic Sea are used to analyse offshore low-level clouds (LLCs) influenced by low-level jets (LLJs) in the marine atmospheric boundary layer. The LLJs are passages of strong horizontal winds near the surface and are measured using a Doppler LiDAR, which provides information about the wind speed and wind direction up to 300 meters. READ MORE

6. 25. Overcoming Inter-carrier-interference in OFDM System

   University essay from Linköpings universitet/Kommunikationssystem

   Author : Fukang Guo; Luoan Lu; [2021]
   Keywords : ICI; OFDM; TDCP; FDCE; Windowing-OFDM; 5G;

   Abstract : This master thesis aims for Inter-carrier interference (ICI) mitigation in orthogonal frequency division multiplexing (OFDM) system by considering designs of frequency domain cyclic extension(FDCE) and optimal windowing pulse shape. Although OFDM system has been put forward in the 1970s, it has just emerged in 4G. READ MORE