Sökning: "Peak Distortion"

Visar resultat 6 - 10 av 32 avhandlingar innehållade orden Peak Distortion.

1. 6. Nonlinearity in Broadband Wireless Communication Systems

   Författare :Ali Behravan; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; baseband predistortion; single carrier modulation; orthogonal frequency division multiplexing OFDM ; bandpass nonlinearity; multicarrier modulation; nonlinearity distortion; high power amplifier; RF predistortion; peak to average power ratio PAPR ; baseband nonlinearity;

   Sammanfattning : In the implementation of a digital communication system, there often exist imperfections that are not considered in the primary design. One such imperfection is the nonlinearity of the front-end devices. LÄS MER

3. 7. Demand Side Activities for Electric Load Reduction

   Författare :Juozas Abaravicius; Energihushållning; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Load demand; Energiforskning; Energy research; demand response; peak load reduction; load management; demand side;

   Sammanfattning : The research described in this thesis, focuses on some activities on the demand side that could reduce peak load in electricity system by using consumer flexibility i.e. by increasing the demand side response to signals coming from the energy market. LÄS MER

4. 8. On Massive MIMO Base Stations with Low-End Hardware

   Författare :Christopher Mollén; Erik G. Larsson; Thomas Eriksson; Josef Nossek; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; massive MIMO; hardware; ADC; power amplifier; out-of-band radiation; peak-to-average ratio;

   Sammanfattning : Massive MIMO (Multiple-Input Multiple-Output) base stations have proven, both in theory and in practice, to possess many of the qualities that future wireless communication systems will require.  They can provide equally high data rates throughout their coverage area and can concurrently serve multiple low-end handsets without requiring wider spectrum, denser base station deployment or significantly more power than current base stations. LÄS MER

5. 9. Pulse-Width Modulated RF Transmitters

   Författare :Muhammad Fahim Ul Haque; Ted Johansson; Dake Liu; Qamar Ul Wahab; Franz Dielacher; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The market for wireless portable devices has grown signicantly over the recent years.Wireless devices with ever-increased functionality require high rate data transmissionand reduced costs. LÄS MER

7. 10. High Efficiency Microwave Amplifiers and SiC Varactors Optimized for Dynamic Load Modulation

   Författare :Christer Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear measurements; power amplifiers; load modulation; GaN; SiC; varactors; HEMT; wide bandgap technology; energy efficiency;

   Sammanfattning : The increasing use of mobile networks as the main source of internet connectivity is creating challenges in the infrastructure. Customer demand is a moving target and continuous hardware developments are necessary to supply higher data rates in an environmentally sustainable and cost effective way. LÄS MER