Sökning: "digital signal processors"

Visar resultat 1 - 5 av 28 avhandlingar innehållade orden digital signal processors.

  1. 1. FPGA based data acquistion and digital pulse processing for PET and SPECT

    Författare :Abdel Kader Bousselham; Christian Bohm; Ulf Bäverstam; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Digital signal processing; positron emission tomography; single photon computed tomography; field programmable gate arrays; digital signal processors; digital data acquisition; free running clock sampling; Physics; Fysik; Physics; fysik;

    Sammanfattning : The most important aspects of nuclear medicine imaging systems such as Positron Emission Tomography (PET) or Single Photon Emission Computed Tomography (SPECT) are the spatial resolution and the sensitivity (detector efficiency in combination with the geometric efficiency). Considerable efforts have been spent during the last two decades in improving the resolution and the efficiency by developing new detectors. LÄS MER

  3. 2. Custom Designed Digital Signal Processors Using Bit-Serial Arithmetic

    Författare :Peter Nilsson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; On-Chip Clocking; Digital IF-Filtering; Digital Wideband Filtering; Elektronik; Electronics; Bit-Serial Arithmetic; CMOS; Custom DSP; VLSI;

    Sammanfattning : This thesis presents two prime contributions. First, digital filters for both intermediate and base band filtering for mobile communication are presented. Second, a local clock for on-chip clock generation is introduced. The intermediate frequency filter is a digital alternative to today's analog filters. LÄS MER

  4. 3. Digital signal processing methods and algorithms for audio conferencing systems

    Författare :Fredric Lindström; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Audio conferencing systems;

    Sammanfattning : Today, we are interconnected almost all over the planet. Large multinational companies operate worldwide, but also an increasing number of small and medium sized companies do business overseas. As people travel to meet and do businesses, the already exposed earth is subject to even more strain. LÄS MER

  5. 4. ASIC Implementation of a Delayless Acoustic Echo Canceller: Architecture and Arithmetic

    Författare :Anders Berkeman; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling; Digital Arithmetic; Acoustic Echo Cancellation; Hardware Implementation; Digital ASIC Design; Digital Signal Processing;

    Sammanfattning : Application specific digital signal processors are superior compared to standard digital signal processors in a number of application fields, mainly due to high throughput and low power consumption traded for flexibility. This thesis deals with two areas related to hardware implementation of custom digital signal processors: design methodology and efficient implementation of arithmetic circuits. LÄS MER

  7. 5. Integrated Optimal Code Generation for Digital Signal Processors

    Författare :Andrzej Bednarski; Christoph Kessler; Alain Darte; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Instruction-level parallelism; integrated code generation; dynamic programming; instruction scheduling; instruction selection; clustered VLIW architecture; integer linear programming; architecture description language; Computer science; Datavetenskap;

    Sammanfattning : In this thesis we address the problem of optimal code generation for irregular architectures such as Digital Signal Processors (DSPs).Code generation consists mainly of three interrelated optimization tasks: instruction selection (with resource allocation), instruction scheduling and register allocation. LÄS MER