Sökning: "Impairments"

Visar resultat 1 - 5 av 426 avhandlingar innehållade ordet Impairments.

  1. 1. MIMO Systems with Residual Hardware Impairments

    Författare :Xinlin Zhang; Chalmers University of Technology; []
    Nyckelord :training length.; residual hardware impairments; large-scale MIMO; Achievable rate; channel estimation; channel capacity; energy efficiency;

    Sammanfattning : Recent years have witnessed an unprecedented explosion in mobile data traffic, due to the expansion of numerous types of wireless devices, which have enabled a plethora of data-hungry applications. Novel techniques, such as large-scale multiple-input multiple-output (MIMO) systems, represent potential candidates to support the ever-growing demands. LÄS MER

  2. 2. Autism and ADHD in children with cerebral palsy

    Författare :Magnus Påhlman; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES; cerebral palsy; autism spectrum disorder; attention-deficit hyperactivity disorder; children; impairments; screening; prevalence; neuroimaging;

    Sammanfattning : BACKGROUND: Autism spectrum disorder (autism) and attention-deficit/hyperactivity disorder (ADHD) are likely underdiagnosed in children with cerebral palsy (CP). Early identification of impairments is important for adequate understanding and support. LÄS MER

  3. 3. How to Make Bicycling Safer - Identification and Prevention of Serious Injuries among Bicyclists

    Författare :Maria Ohlin; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Bicycle; Injuries; Crashes; ICF; HRQoL; Sickness Absence; Health; Disabilities; Impairments;

    Sammanfattning : The overall aim of this thesis was to guide current and future safety improvements that address serious injuries among bicyclists. The thesis is compiled by four studies, of which the first two aimed to identify injuries leading to loss of health from a biopsychosocial perspective, and the two following studies aimed to understand how these injuries occur and how they can be prevented. LÄS MER

  4. 4. Characterization and Compensation of Hardware Impairments in Transmitters for Wireless Communications

    Författare :Zain Ahmed Khan; Peter Händel; Magnus Isaksson; Mikko Valkama; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power amplifier; RF transmitters; SISO; MIMO; crosstalk; Volterra series; Volterra kernels; behavioral modeling; DPD; Ramanujan sums; multitone signals; I Q Imbalance; non-linearity; memory polynomial; density estimation; hardware impairments; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Increasing demands for data rate, energy efficiency and reliability in wireless communications have resulted in the introduction of radio frequency (RF) multiple input multiple output (MIMO) transmitters. However, MIMO transmitters suffer from additional crosstalk impairments along with the power amplifier (PA) and I/Q imbalance distortions observed in single input single output (SISO) transmitters. LÄS MER

  5. 5. Industry-Specific Economic Outlook and the Value Relevance of Reported Goodwill Impairments

    Författare :Peter Edlund Frii; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SFAS 142; Fair-value Goodwill Accounting; Goodwill Impairments; Industry-specific Economic Outlook; Value Relevance; Banks; Financial Institutions; Pharmaceutical Industry;

    Sammanfattning : .... LÄS MER