Search for dissertations about: "noise cancellation"

Showing result 1 - 5 of 25 swedish dissertations containing the words noise cancellation.

  1. 1. On Enhancement and Quality Assessment of Audio and Video in Communication Systems

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Andreas Rossholm; Blekinge Tekniska Högskola.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QoE; video quality assessment; video quality metric; multi-linear regression; artificial neural network; support vector machine; quality predictor; machine learning; temporal scaling; spatial scaling; video compression; deblocking filter; noise cancelling; synchronization; audio delay; video delay; GSM interference signal; noise cancellation; notch filtering;

    Abstract : The use of audio and video communication has increased exponentially over the last decade and has gone from speech over GSM to HD resolution video conference between continents on mobile devices. As the use becomes more widespread the interest in delivering high quality media increases even on devices with limited resources. READ MORE

  2. 2. On Parameter Estimation Employing Sinewave Fit andPhase Noise Compensation in OFDM Systems

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Senay Negusse; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Parameter Estimation; Maximum-likelihood; OFDM; Phase-Noise; Wireless Channel; Informations- och kommunikationsteknik; Information and Communication Technology;

    Abstract : In today’s modern society, we are surrounded by a multitude of digital devices.The number of available digital devices is set to grow even more. As the trendcontinues, product life-cycle is a major issue in mass production of these devices. READ MORE

  3. 3. On the Enhancement of Audio and Video in Mobile Equipment

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Andreas Rossholm; Blekinge Tekniska Högskola.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Audio enhancement; video enhancement; active noise cancellation; video coding; mobile equipment;

    Abstract : Use of mobile equipment has increased exponentially over the last decade. As use becomes more widespread so too does the demand for new functionalities. The limited memory and computational power of many mobile devices has proven to be a challenge resulting in many innovative solutions and a number of new standards. READ MORE

  4. 4. Design, Characterization, and Calibration of Low-Noise Terahertz Receivers

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Olle Nyström; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; receiver characterization; instrumentation; antenna design; Radio astronomy; calibration; optics;

    Abstract : This thesis is focused on the field of instrumentation for radio-astronomy and atmospheric science, and specifically deals with problems such as optical design and its verification, horn antennas and receiver optics’ components, different aspects of measurement systems in order to characterize low-noise THz receivers, and its calibration techniques.Ultra low-noise Terahertz receivers, used in radio-astronomy, are typically coupled to the telescope system through relay optics that provides guiding of the signal to the receiver frontend with minimal loss. READ MORE

  5. 5. On Receiver Algorithms for OFDM Systems

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Florent Munier; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quantisation; multicarrier modulation; Intercarrier Interference ICI ; Phase noise; Wiener process; orthogonal frequency division multiplexing OFDM ; estimation; fading channels; channel estimation; iterative decoding.;

    Abstract : This thesis addresses the problem of designing a receiver for an Orthogonal FrequencyDivisionMultiplexing (OFDM)communication system operating over fading channels, taking into account the effects of hardware imperfections. We discuss solutions for efficiently estimating the parameters of a channel model and for compensating oscillator phase noise and analog to digital converter (ADC) quantisation errors at the receiver. READ MORE