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17.039  Articles
1 of 1.705 pages  |  10  records  |  more records»
Low Frequency (LF) radio signals lie in the band 30-300 kHz. Monitoring equipment able to measure the electric strength of such signals, at field sites with very low noise levels, were designed and assembled in Italy. From 1993 onwards, the electric field... see more

The remarkable technology for seamless integration of wireless and optical networks is radio frequency signals over Free Space Optics (FSO). This research study and simulation examine the design and evaluation performance of Radio Frequency over FSO (RF-F... 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

This paper presents the results of the analysis of the directions of development of special purpose radio communication systems. The method of application of signals of advanced modulation by cyclic shift of the code with adaptation on speed of informatio... see more

Established that, directivity diagram of the system of “basic antenna – fuselage of helicopter” becomes a function of the time due to the presence of the metal main screw, which during rotation, periodically changes geometry of aircraft body. In this case... see more

The work deals with the issues of the determination of the probability of frequency-selective fading (FSF) of navigational radio signals in satellite radio navigation systems under artificial ionosphere disturbances. The connection between the coherence b... see more

In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these bands, with the measurement for each of them of the el... see more

Digitization and the Internet have enabled traditional radio to gain new formats, new listeners, enrich content and make it available globally. Hybrid radio is the result of digitization and media convergence, enabling the availability of programs and acc... see more

Due to an increase in the number of radio devices with different types of signals and to increase the speed of information transmission, it is necessary to take into account the increase in the probability of erroneous reception of signals as a result of ... see more

1 of 1.705 pages  |  10  records  |  more records»