Two-port model of an antenna for use in characterizing wireless communications systems, obtained using efficiency measurements

2003 ◽  
Vol 45 (3) ◽  
pp. 115-118 ◽  
Author(s):  
S.D. Rogers ◽  
J.T. Aberle ◽  
D.T. Auckland
Keyword(s):  
Wireless Communications ◽  
Communications Systems ◽  
Wireless 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.

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