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3.052  Articles
1 of 306 pages  |  10  records  |  more records»
Currently, one of the dominant types of information exchange is remote interaction between geographically distributed subscribers using a wide range of wireless telecommunication systems. One of the important requirements for such systems is the minimum p... see more

Currently, a wide class of modern wireless telecommunications systems is based on the use of broadband signals. The problems of synthesis for their formation and processing algorithm are extremely important for such systems, especially under the condition... see more

Pulsed excitation of small size monopole antennas for generating wideband electromagnetic pulses was used. The monopoles were excited by electrical pulses having rise times of 600 ps, 200 ps, 70 ps and voltages 100 V, 15 V, and 0.... see more

Recently, in a number of works devoted to the synthesis and processing of complex signals, along with the trigonometric basis, other orthogonal bases are also used. However, in these works, often, such signals are not evaluated by the peak factor, and als... see more

“Deployment of broadband seismic stations on the Antarctica continent” is an ambitious project to improve the spatial resolution of seismic data across the Antarctic Plate and surrounding regions. Several international collaborative programs for the purpo... see more

The essential part of Cognitive Radio (CR) is spectrum sensing, so that the underutilized spectrum could be detected to improve the spectrum efficiency. For this purpose, a wide range of frequency bands are considered and locations of multiple occupied sp... see more

A phase-shift cavity ring-down spectroscopy (PS-CRDS) experimental set-up has been established using a broadband diode laser for the measurement of phase shift due to absorption of NO2 in a sealed off cavity ring-down cell. The PS-CRDS technique is verifi... see more

The broadband plane wave model is valid only in the far-field of a point source under free-field propagating conditions. However the acoustics in ocean is characterized by multi-modal acoustic propagation due to its top-bottom limited boundary conditions.... see more

Modern radio engineering systems are characterized by the use of radio waves with a complex internal structure as information carriers. Such radio waves are characterized by an increased transmission spectrum width and programmed pseudo-random tuning of t... see more

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