Search for dissertations about: "digital PA"

Showing result 1 - 5 of 51 swedish dissertations containing the words digital PA.

2. 1. Low Noise Oscillator in ADPLL toward Direct-to-RF All-digital Polar Transmitter

   Author : Jian Chen; Li-Rong Zheng; Fredrik Jonsson; Hannu Tenhunen; Georges Gielen; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; all-digital; digitally-intensive; frequency modualtion; phase modulation; amplitude modulation; polar; transmitter; oscillator; digital controled oscillator; DCO; VCO; voltage controled oscillator; class-C oscillator; class-D PA; ADPLL; phase noise; RF; CMOS.;

   Abstract : In recent years all-digital or digitally-intensive RF transmitters (TX) have attracted great attention in both literature and industry. The motivation is to implement RF circuits in a manner suiting advanced nanometer CMOS processes. To achieve that, information is encoded in the time-domain rather than voltage amplitude. READ MORE

4. 2. All-Digital PWM Transmitters

   Author : Muhammad Touqir Pasha; Ted Johansson; Mark Vesterbacka; Henrik Sjöland; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Electronic devices with wireless connectivity are fast becoming a part of daily life. According to some estimates, in the next five years, 10 billion new devices with internet connectivity would be produced. READ MORE

5. 3. Humanizing Technology Through Post-Digital Art

   Author : Vygandas Vegas Simbelis; Kristina Höök; John Bowers; KTH; []
   Keywords : Humanization of technology; post-digital aesthetics; abstraction; materiality; immateriality; interpretative digitality; hacking; disruption; accelerationism; interactive art; interaction design; human-computer interaction.; Art; Technology and Design; Konst; teknik och design; Människa-datorinteraktion; Human-computer Interaction; Media Technology; Medieteknik; Computer Science; Datalogi; Electrical Engineering; Elektro- och systemteknik;

   Abstract : I draw upon the idea of the post digital to create (1) art for humanization of technology and (2) art as manifestations of digital qualities in the physical world, e.g., through digital-analog convergence, or through enriching our experiences with hybrid constellations of techniques, concepts and aesthetics. READ MORE

6. 4. Digital Predistortion for the Linearization of Power Amplifiers

   Author : Jessica Chani Cahuana; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; behavioral model; Volterra series; nonlinear; digital predistortion; Doherty power amplifier; power amplifier; efficiency;

   Abstract : High efficiency and linearity are indispensable requirements of power amplifiers. Unfortunately they are difficult to obtain simultaneously, since high efficiency PAs are nonlinear and linear PAs may have low efficiency. READ MORE

7. 5. Digital Compensation Techniques for Power Amplifiers in Radio Transmitters

   Author : Jessica Chani Cahuana; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear system; linearization; power amplifier; iterative learning control; digital predistortion; Volterra series;

   Abstract : Power amplifiers (PAs) are vital components in radio transmitters because they are responsible to amplify the low power communication signals to power levels suitable for transmission. Important requirements of PAs are high efficiency and linearity. Unfortunately, there is a tradeoff between efficiency and linearity. READ MORE