Sökning: "distance spectrum"

Visar resultat 11 - 15 av 80 avhandlingar innehållade orden distance spectrum.

1. 11. Multirate Codes and Multicarrier Modulation for Future Communication Systems

   Författare :Pål Frenger; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel estimation; code-spread CDMA; DS-CDMA; convolutional codes; interference cancellation; nested convolutional codes; multicarrier modulation; optimum distance spectrum ODS ; rate-compatible punctured convolutional codes RCPC-codes ; OFDM; turbo decoding; rate matching; parallel combinatory signaling; Rayleigh fading;

   Sammanfattning : In this thesis, new detection and modulation methods for multicarrier systems are presented. The proposed multicarrier detectors are based on feedback of previously detected symbols and the idea is to exploit the correlation, both in time between consecutive symbols, and in frequency between neighboring sub-carriers. LÄS MER

3. 12. Enhancement of Salient Image Regions for Visual Object Detection

   Författare :Keren Fu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; geodesic distance; graph spectral decomposition; video processing; visual attention; color contrast and distribution; propagation; salient region; figure-ground segmentation;

   Sammanfattning : Salient object/region detection aims at finding interesting regions in images and videos, since such regions contain important information and easily attract human attention. The detected regions can be further used for more complicated computer vision applications such as object detection and recognition, image compression, content-based image editing, and image retrieval. LÄS MER

4. 13. Manual Motor Development in Infancy : Execution and Observation of Actions

   Författare :Therese Ljunghammar Ekberg; Gustaf Gredebäck; Claes von Hofsten; Jeffrey J. Lockman; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Infancy; Motor development; Reaching; Actions; Motor prediction; Prospective motor control; Social cognition; Stereopsis; Mirror neuron system; Mu rhythm; Motor impairment; Autism Spectrum Disorder; High-risk siblings; Psychology; Psykologi;

   Sammanfattning : Of all motor skills, manual reaching might be the one ability that matters most for infants’ perceptual, cognitive and social development. Reaching allows infants to learn about object properties, but also gives opportunities for socializing with others. LÄS MER

5. 14. On Spectrally Efficient Continuous Phase Modulation

   Författare :Tommy Svensson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adjacent channel interference; additive white Gaussian noise {AWGN} ; convolutional codes; minimum Euclidean distance; continuous phase modulation CPM ; bandwidth efficiency; co-channel interference; reduced complexity detectors; optimized phase pulses.;

   Sammanfattning : Spectrally efficient partial response continuous phase modulation (CPM)for wireless links is considered. Continuous phase modulation defines constantenvelope phase codes, which are advantageous when using non-linear amplifiers. LÄS MER

7. 15. Studies on ventilatory function in chronic neuromuscular disorders

   Författare :Jan Weinberg; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :ventilatory dysfunction; neuromuscular disorders; diaphragm; electromyogram; power spectrum; blood gas; ventilatory mechanics; sleep; polysomnography;

   Sammanfattning : Ventilatory dysfunction is common in neuromuscular disorders (NMD). The present studies aimed at evaluating and developing methods for diagnosis of ventilatory function in NMD. Methods included were diaphragmatic EMG (EMGdi), blood gas monitoring assessed at rest and during exercise and nocturnal respiratory and sleep parameters. LÄS MER