Essays about: "Karl-Johan Hällgren"

Found 2 essays containing the words Karl-Johan Hällgren.

1. 1. 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

3. 2. Monitoring Air Quality in Ångström Cleanroom Laboratory

   University essay from Uppsala universitet/Institutionen för teknikvetenskaper

   Author : Linus Kanestad; Gustaf Andersson; Karl-Johan Hällgren; [2019]
   Keywords : Internet of things; Rasberry Pi; Radio;

   Abstract : The air quality in the Ångström cleanroom was to be measured for monitoring and control purposes, with the measurements displayed on a website. To do this several sensors, micro controllers, means of communication, and ways to host the server were investigated. READ MORE