منابع مشابه
Construction des codes QPSK temps-espace en treillis équilibrés pour plusieurs antennes d’émission Design of QPSK Balanced Space-Time Trellis Codes for Several Transmit Antennas
and key words
متن کاملComplexité en espace de l'exploration de graphes
Graph Exploration is a problem motivated by several aspects of theoretical computer science, including logic and computational complexity. It has also numerous applications in robotics. In all these contexts, the amount of memory used by the mobile entity (robot, finite automaton, etc.) performing exploration is a key parameter. In this thesis, we study in depth the space complexity of graph ex...
متن کاملAnalysis and design of space-time block codes for coded MIMO transmissions. (Analyse et conception de code espace-temps en blocs pour transmissions MIMO codées)
Most of the modern wireless communication systems as WiMAX, DVB-NGH, WiFi, HSPA+, LTE and 4G have adopted the use of multiple antennas at the transmitter and the receiver, called multiple-input multiple-output (MIMO). Space time coding for MIMO systems is a promising technology to increase the data rate and enhance the reliability of wireless communications. The diversity-multiplexing tradeoff ...
متن کاملMétadonnées spatiotemporelles temps réel
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...
متن کاملLayoffs, Lemons and Temps∗
We develop a dynamic equilibrium model of labor demand with adverse selection. Firms learn the quality of newly hired workers after a period of employment. Adverse selection makes it costly to hire new workers and to release productive workers. As a result, firms hoard labor and under-react to labor demand shocks. The adverse selection problem also creates a market for temporary workers. In equ...
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ژورنال
عنوان ژورنال: Articles
سال: 2005
ISSN: 1708-8968,0007-9766
DOI: 10.7202/021174ar