Radio Communications Systems Active Duty. Analysis Extract (AFSC 3C1X1)

2003 ◽  
Author(s):  
Sabrina Ocampo
Keyword(s):  
Active Duty ◽  
Radio Communications ◽  
Communications Systems

Cognitive Wireless Communications – A paradigm shift in dealing with radio resources as a prerequisite for the wireless network of the future – An overview on the topic of cognitive wireless technologies

Frequenz ◽  
2016 ◽  
Vol 70 (7-8) ◽  
Author(s):  
Thomas Haustein ◽  
Slawomir Stanczak ◽  
Adam Wolisz ◽  
Friedrich Jondral ◽  
Hans Schotten ◽  
...  
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Mobile Network ◽  
Radio Spectrum ◽  
Wireless Channel ◽  
Radio Communications ◽  
Communications Systems ◽  
Starting Point ◽  
The Status ◽  
Wireless Communications Systems

AbstractWireless radio communications systems form the basis for mobile network connections in the digital society. A limited amount of radio spectrum and a spatially densified use of wireless communications systems require a resource-efficient use of the spectrum. Mechanisms of cognitive radio may hold the key to a more efficient use of the available spectrum under consideration of quality of service requirements. These mechanisms take advantage of location-specific knowledge of the wireless channel occupation in the dimensions of frequency, time, location and direction in space and therefore enable co-existent and reliable wireless communication. The authors give an introduction to the status of cognitive wireless communication technology, which represents the starting point of a series of research projects promoted by BMBF during 2012–2014.

Electrically small wire antennas for rocket and space radio communications systems

2011 ◽  
Author(s):  
V. V. Ovsyanikov ◽  
O. L. Makarov ◽  
O. L. Ol'shevs'kiy ◽  
G. V. Petrenko ◽  
V. M. Popel' ◽  
...  
Keyword(s):  
Radio Communications ◽  
Communications Systems ◽  
Wire Antennas

The development of maritime radio communications

2018 ◽  
Vol 30 (3) ◽  
pp. 536-543 ◽  
Author(s):  
Stojce Dimov Ilcev
Keyword(s):  
Historical Review ◽  
Weather Conditions ◽  
Mobile Radio ◽  
Late Nineteenth Century ◽  
Radio Communications ◽  
Safety Standards ◽  
Communications Systems ◽  
Primary Means ◽  
Point To Point ◽  
Mobile Radio Communications

This paper provides an historical review of maritime mobile radio communications systems as a primary means of ensuring the safety and security of ships at sea. Safety at sea has always been a priority for seamen and shippers. Distress alerts at sea caused by the blind forces of Mother Nature or, more commonly, by human factors have occurred over many centuries, as seafarers often set sail with inadequate information about their course, navigation and weather conditions. Until the late nineteenth century, only audio and visual transfers of information from point to point were used. From then on, however, new methods, such as news and information via wire and then by radio communications systems, were introduced. So long as safety standards are met, it is also important to test innovations and technology transfer to develop devices that are more reliable than mobile radio communications.

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