Results 281 to 290 of about 13,375,458 (347)
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Increased optical transmission ranges throughout: bandwidth compression
SPIE Proceedings, 2004The paper presents techniques for information coding and optical bandwidth reduction that leads to decrease in chromatic dispersion in the optical signal and thus results with an increase in the possible transmission ranges of transceivers.
Zeev Zalevsky +2 more
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Long-Range Shallow-Water Transmission Measurements
The Journal of the Acoustical Society of America, 1964Recent measurements were made in 25-f (fathom) water with 15-min CW tones of 350-, 700-, and 1300-cps sound transmitted from an anchored ship. The sound was received on an anchored vertical string of 14 hydrophones spaced 10 ft apart. The measurements were made to a range of 80 kyd over selected paths for which the thickness of the subbottom had been ...
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Long range navigation utilizing VLF transmissions
Ocean 72 - IEEE International Conference on Engineering in the Ocean Environment, 1972The highly stable propagation characteristics of VLF transmissions make them an ideal source of world-wide navigation data. The arrival phase of a VLF signal is continuously compared with a local standard. The change in the phase difference between the received signal and the local standard is converted to relative motion with respect to the VLF ...
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Analog Eigenmode Transmission for Short-Range MIMO
IEEE Transactions on Vehicular Technology, 2016This paper proposes a method of implementing analog eigenmode transmission for a short-range multiple-input–multiple-output (SR-MIMO) system that uses only 180° hybrid couplers. If the short-range MIMO system places transmitting and receiving arrays in line-of-sight (LOS) and symmetrically with respect to specific reference planes, the channel matrix ...
Kentaro Murata +3 more
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Transmission Range Effects on AODV Multicast Communication
Mobile Networks and Applications, 2002As laptop computers begin to dominate the marketplace, wireless adapters with varying bandwidth and range capabilities are being developed by hardware vendors. To provide multihop communication between these computers, ad hoc mobile networking is receiving increasing research interest.
Elizabeth M. Belding-Royer +1 more
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Delay-Aware Transmission Range Control for VANETs
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010End-to-end delay is critical for the real-time safety message delivery in Vehicular Ad Hoc Networks (VANETs). In this paper, we present an analytical model to evaluate the impact of transmission range on the end-to-end delay in 802.11p-based VANETs. Compared with the previous works, our model derives a concise expression of the transmission delay in ...
Jialiang Li, Chunxiao Chiga
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Tidal effects on long‐range sound transmission
Journal of Geophysical Research: Oceans, 1981Time series of acoustic travel times over long distances have significant tidal components. We discuss three experiments: First, for a 900 km westward transmission from a moored source southwest of Bermuda, the M2 constituent (apart from mooring motion) of 8 ms can be accounted for by a variable propagation with and against the 2 cm/s barotropic tidal ...
W. Munk +6 more
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A Forward-Transmission Echo-Ranging System
Proceedings of the IRE, 1949A new type of echo-ranging system is described in which the receiver is located at a distance from the transmitter. It is shown that, with a configuration of this type, the range of the target with respect to the receiving station is equal to the difference in path between the direct and reflected waves divided by the versine of the angle of elevation ...
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Mid-range Wireless Power Transmission in Space
46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2010Wireless power transmission using magnetic resonance is discussed. Theoretical transmission efficiency was derived as a function of impedance ratio r and RF frequency ω. Impedance matching is possible to attain maximum transmission efficiency for various coupling coefficient cases.
Masayoshi Koizumi +5 more
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