57,540 research outputs found
Quality of Service over TCP/IP-Based Satellite Networks: Experience from an ASI/CNIT Project
No full textCNIT-ASI Project 'Integration of Multimedia Services on Heterogeneous Satellite Networks': Experimental Results
No full textTCP/IP-based multimedia applications and services over satellite links: Experience from an ASI/CNIT project
No full textA quality of service guarantee in IP satellite environment: experimental experience in the CNIT-ASI project "integration of multimedia services on heterogeneous satellite networks"
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Polarization Diversity for Multiband UWB Systems
No full textUltra-wideband (UWB) transmission provides a fast local range wireless connection using the same frequency spectrum assigned to other narrowband communication standards. A precise knowledge of the indoor transmission channel is necessary to obtain high performance. Several channel models have been presented in the literature, but normally without considering the distortion effect caused by a real UWB antenna. A detailed antenna model shows that the radiation pattern varies with frequency, i.e., different receiver positions and antenna orientations result in different antenna frequency responses. In order to obtain a more uniform coverage over the indoor area, two transmitting antennas with orthogonal polarization can be used. The receiver can use a single antenna whose orientation and position is arbitrary within the coverage area, resulting in a special case of a 2:1 MISO system in which a space-time encoding is used at the transmitter. The target is to employ the polarization diversity to obtain a constant quality of symbol detection while the receiver moves around in the coverage area. The proposed polarization diversity scheme is applied in an UWB multiband scenario and it is compared to both a single antenna scheme and a classical space diversity scheme employing a single polarized antenna arra
An applied research study for the provision of a QoS-oriented environment for voice and video services over satellite networks
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Letter from Carl Hayden to L. S. Williams
No full textLetter from Carl Hayden to L. S. Williams about the potential to expand the park boundaries
Mystery Author Stan Jones and Sepculative Fiction Authors Sterling Emmal and L. S. Goulet
No full textSterling Emmal is author of the sci-fi fantasy The Executioner of Rawule and L. S. Goulet is author of the fantasy book Sword of Dragonblood. Tundra Kill is Stan Jones' latest Nathan Active mystery. His other books include White Sky, Black Ice; Shaman Pass, Frozen Sun; Village of the Ghost Bears, and the nonfiction classic, The Spill: Personal Stories from the Exxon Valdez Disaster, coauthored with Sharon Bushell
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