Search for dissertations about: "cellphones"

Showing result 1 - 5 of 6 swedish dissertations containing the word cellphones.

2. 1. Integrated Transmitters for Cellular User Equipment–Wideband CMOS Power Amplifiers and Antenna Impedance Tuners

   Author : Jonas Lindstrand; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CMOS; LTE; Impedance tuner; Injection lock; Power amplifier; Efficiency; Polar bandwidth expansion; multiband;

   Abstract : The digital cellular systems era started about thirty years ago with the release of the first digital cellphones. These first digital cellphones were very different from today’s slim and esthetic cellular pocket computers. They were not mass-produced in million units a day, and they were designed for radio performance rather than appearance. READ MORE

4. 2. Smuggle, Frame, Shoot : Illicit Media Practices and Visual Insurgency from Lebanese Incarceration

   Author : Chafic T. Najem; Kari Andén-Papadopoulos; Malin Wahlberg; Anne Kaun; Stockholms universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; media studies; visual culture; media practice; media witnessing; digital activism; vulnerability; prison practices; prison representations; prison testimonies; medie- och kommunikationsvetenskap; Media and Communication Studies;

   Abstract : This research explores prisoners’ illicit use of digital-media technology during their incarceration in Lebanon. Prisoners smuggle cellphones and access internet and telecommunication connection to produce and mediate videos, images, and voice recordings documenting quotidian experiences of imprisonment, violent events, and the COVID-19 Pandemic inside the notorious and overcrowded Roumieh Central Prison. READ MORE

5. 3. Motion and Structure Estimation From Video

   Author : Johan Hedborg; Michael Felsberg; Per-Erik Forssén; Reinhard Koch; Linköpings universitet; []
   Keywords : ;

   Abstract : Digital camera equipped cell phones were introduced in Japan in 2001, they quickly became popular and by 2003 outsold the entire stand-alone digital camera market. In 2010 sales passed one billion units and the market is still growing. READ MORE

6. 4. Interference detection and localization in the GPS L1 frequency band

   Author : Oscar Isoz; Magnus Lundberg-Nordenvaad; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

   Abstract : The usage of Global Navigation Satellite Systems (GNSS) in general and the American GPS in particular increases everyday and so does the number of applications where it is used. The GNSS receivers relies on receiving signals from satellites orbiting the earth at an altitude of about 20 000 km and the signals received by the receiver are signicantly weaker then the background noise. READ MORE

7. 5. Low-Voltage Analog-to-Digital Converters and Mixed-Signal Interfaces

   Author : Prakash Harikumar; Jacob Wikner; Atila Alvandpour; Dag T. Wisland; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Analog-to-digital converters (ADCs) are crucial blocks which form the interface between the physical world and the digital domain. ADCs are indispensable in numerous applications such as wireless sensor networks (WSNs), wireless/wireline communication receivers and data acquisition systems. READ MORE