Search for dissertations about: "ber"

Showing result 1 - 5 of 62 swedish dissertations containing the word ber.

  2. 1. Adaptive MIMO Systems with Channel State Information at Transmitter

    Author : Jinliang Huang; Svante Signell; Øien Geir; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adaptive modulation; adaptive power allocation; average spectral efficiency; MIMO; BER.; Telecommunication; Telekommunikation;

    Abstract :  This dissertation presents adaptation techniques that can achieve high spectral efficiency for single user multiple-input multiple-output (MIMO) systems. Two types of adaptation techniques, adaptive modulation and adaptive powe allocation, are employed to adapt the rate and the transmit power to fading channels. READ MORE

  4. 2. On interference suppression techniques for communication systems

    Author : Hongxia Zhao; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CDMA; QPSK; fixed-point implementation; DQPSK; rapid single flux quantum RSFQ ; MUD; unequal BER; fiber-optic communications; unequal SER; ISI;

    Abstract : The work presented in this thesis concerns interferencesuppression techniques in two different communication systems.In the first part we study fiber-optic systems with practical non-ideal transmitters and receivers, which give rise to intersymbol interference (ISI). READ MORE

  5. 3. Studies of protein structure, dynamics and protein-ligand interactions using NMR spectroscopy

    Author : Tobias Tengel; Göran Larsson; Maria Sunnerhagen; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 19F NMR; 2S albumin; PapD; protein-ligand interaction; structure; TFE; Yersinia; YopD; allergy; amphipathic helix; Ber e 1; Brazil nut; dynamics; FimC; LcrH; NMR screening; Biophysics; Biofysik;

    Abstract : In the first part of the thesis, protein-ligand interactions were investigated using the chaperone LcrH, from Yersinia as target protein. The structure of a peptide encompassing the amphipathic domain (residue 278-300) of the protein YopD from Yersinia was determined by NMR in 40% TFE. READ MORE

  6. 4. Post-translational modifications in DNA base excision repair : The roles of CK2 and PARP-1

    Author : Cecilia Ström; Thomas Helleday; Hans Krokan; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; base excision repair; single-strand break repair; PARP-1; CK2; XRCC1; mammalian cells; Cell and molecular biology; Cell- och molekylärbiologi; molekylärgenetik; Molecular Genetics;

    Abstract : Base lesions and DNA single-strand breaks (SSBs) are very common types of DNA damage. The base excision repair (BER) and single-strand break repair (SSBR) machineries both require a succession of enzymatic events in order to remove these types of endogenous lesions and to restore the DNA. READ MORE

  7. 5. Simplified Graphical Approaches for CDMA Multi-User Detection, Decoding and Power Control

    Author : Peng Hui Tan; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; code-division multiple access; belief propagation; large system analysis; iterative decoding; multiuser detection; power control;

    Abstract : The individual optimal detector for code-division multiple-access (CDMA) systems is based on the marginal a posteriori distribution of the transmitted bits. The marginalization is in general hard since a summation is required, which grows exponentially in scope with the number of active users. READ MORE