Search for dissertations about: "nonlinearity distortion"

Showing result 1 - 5 of 27 swedish dissertations containing the words nonlinearity distortion.

2. 1. Nonlinearity in Broadband Wireless Communication Systems

   Author : Ali Behravan; Chalmers tekniska högskola; []
   Keywords : 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;

   Abstract : 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. READ MORE

4. 2. Design and Analysis of Highly Linear Integrated Wideband Amplifiers

   Author : Henrik Sjöland; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CMOS; nonlinearity cancellation; intermodulation distortion; RF amplifiers; IF amplifiers; audio amplifiers; power amplifiers; wideband amplifiers; analog integrated circuits; low voltage; amplifiers; distortion; bipolar; Electronics; Elektronik;

   Abstract : This dissertation deals with techniques for designing integrated amplifiers with high linearity. Amplifiers with operating frequencies from Audio to RF have been built. An enhanced feedback configuration, capable of very low distortion, is presented. READ MORE

5. 3. Low Voltage CMOS Radio Receiver Front-End Design

   Author : Fred Tillman; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; Electrical engineering; Elektronik; Electronics; Elektronik och elektroteknik; Electronics and Electrical technology; Polyphase Filter; Quadrature Signals; Nonlinearity; Distortion; Passive Mixer; Mixer; Low Noise Amplifier; CMOS; Front-End; Low Voltage; Radio; Receiver;

   Abstract : The mass production of integrated circuits for digital electronics has made CMOS technology the most frequently used IC process today. Thanks to the large production volume, CMOS has increasingly become the most cost efficient technology of choice, and the fast development of small, high speed CMOS devices has made the technology feasible for many RF applications. READ MORE

6. 4. Evaluation and Compensation of Nonlinear Distortion in Multicarrier Communication Systems

   Author : Ali Behravan; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinearity; Multicarrier communication systems; peak-to-average power ratio;

   Abstract : In modern wireless communication systems with increasing data transfer rateand mobility, designing efficient transceivers is a key issue. Among differentchallenges, nonlinearity of high power amplifiers is a problem that has to beovercome by means of adding extra hardware or using more efficient signalprocessing algorithms. READ MORE

7. 5. Nonlinearity mitigation in phase-sensitively amplified optical transmission links

   Author : Kovendhan Vijayan; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; copier-PSA; nonlinearity mitigation; phase-sensitive amplifier; self-phase modulation mitigation; low-noise amplification; optical transmission; crossphase modulation mitigation;

   Abstract : The fundamental limitations in fiber-optic communication are caused by optical amplifier noise and the nonlinear response of the optical fibers. The quantum-limited noise figure of erbium-doped fiber amplifier (EDFA) or any phase-insensitive amplifier is 3 dB. READ MORE