Search for dissertations about: "predistortion"

Showing result 1 - 5 of 23 swedish dissertations containing the word predistortion.

  1. 1. Inverse system identification with applications in predistortion

    Author : Ylva Jung; Martin Enqvist; Lennart Ljung; Torkel Glad; Thomas Eriksson; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system identification; inverse models; signal processing; power amplifiers; predistortion; communication electronics;

    Abstract : Models are commonly used to simulate events and processes, and can be constructed from measured data using system identification. The common way is to model the system from input to output, but in this thesis we want to obtain the inverse of the system. READ MORE

  2. 2. Digital Predistortion for the Linearization of Power Amplifiers

    Author : Jessica Chani Cahuana; [2015]
    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

  3. 3. Nonlinearity in Broadband Wireless Communication Systems

    Author : Ali Behravan; [2003]
    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. 4. Radio Frequency Power Amplifiers Behavioral Modeling, Parameter Reduction, and Digital Predistortion

    University dissertation from Stockholm : KTH

    Author : Magnus Isaksson; Peter Händel; José C. Pedro; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : This work considers behavioral modeling, parameter-reduction, and digital predistortion of radio frequency power amplifiers. Due to the use of modern digital modulation methods, contemporary power amplifiers are frequently subjected to signals characterized by considerable bandwidths and fast changing envelopes. READ MORE

  5. 5. Digital Predistortion Linearization of High Efficiency Transmitters

    University dissertation from Stockholm : KTH

    Author : Haiying Cao; [2009]

    Abstract : High efficiency and good linearity are two important characteristics of transmitters in future wireless communication systems. However, there is usually a trade-off: when high efficiency is achieved, linearity is degraded and nonlinear distortion occurs. READ MORE