Sökning: "MIMO phase"

Visar resultat 1 - 5 av 21 uppsatser innehållade orden MIMO phase.

1. 1. Parabolic equation models simulating LoS MIMO conditions

   Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

   Författare :Zarafshan Carneil; [2023]
   Nyckelord :MIMO; channel capacity; phase difference; MIMO phase;

   Sammanfattning : This thesis explores and develops a simulation model for Line of Sight(LoS) Multiple-Input Multiple-Output (MIMO) systems in complex environments. The focus will be on implementing a 2 × 2-MIMO system in order to study phase differences of the received signals. LÄS MER

3. 2. Beam selection using Machine Learning in Massive MIMO systems

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Simon Persson; [2023]
   Nyckelord :Massive MIMO; Beamforming; Machine Learning; 5G; NR; Antenna selection; Technology and Engineering;

   Sammanfattning : In mobile communications the demand for increased capacity and speeds is a constant. 5G NR is the latest generation which is now seeing widespread adoption. Crucial technologies like Massive MIMO and beamforming are enabled by the use of large antenna arrays. LÄS MER

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

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

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

   Sammanfattning : 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. LÄS MER

5. 4. Electrically Steerable Phased-Arrays for 5G Sub-6 GHzMassive MIMO Active Antenna Units : Re-configurable Feed Networks

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för elektroteknik

   Författare :Johan Kövamees; [2020]
   Nyckelord :Electrically Steerable Phased-Arrays for 5G Sub-6 GHz Massive MIMO Active Antenna Units;

   Sammanfattning : During this project we have designed a new type of antenna that uses an array of antenna elements in order to emit electromagnetic radiation as signals and to be able to control the beam. After an extended time the design yielded a simulation which had the correct characteristics. LÄS MER

7. 5. PLL for 5G mmWave

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Daniel Bakic; Jinzhuo Wu; [2020]
   Nyckelord :PLL; 5G-NR; RFIC; beamforming; 22nm FDSOI; charge pump; vco; loop filter; frequency divider; phase detector; phase noise; jitter; Technology and Engineering;

   Sammanfattning : This paper presents research and implementation of a high frequency Integer-N phase-locked loop for digital beamforming in mobile devices. Multiple topologies investigated whereof two were implemented. The transient phase noise of the PLL is -104dB/-95dB @1MHz. The output frequency range is from 8G-10G. LÄS MER