scholarly journals COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - Dynamic Frequency Hopping Communities for Efficient IEEE 802.22 Operation

2007 ◽  
Vol 45 (5) ◽  
pp. 80-87 ◽  
Author(s):  
Wendong Hu ◽  
Daniel Willkomm ◽  
Murad Abusubaih ◽  
James Gross ◽  
George Vlantis ◽  
...  
Keyword(s):  
Dynamic Spectrum Access ◽  
Cognitive Radios ◽  
Frequency Hopping ◽  
Dynamic Spectrum ◽  
Spectrum Access ◽  
Ieee 802.22 ◽  
Dynamic Frequency

scholarly journals COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - Polyphase Multipath Radio Circuits for Dynamic Spectrum Access

2007 ◽  
Vol 45 (5) ◽  
pp. 104-112 ◽  
Author(s):  
Eric M. Klumperink ◽  
Rameswor Shrestha ◽  
Eisse Mensink ◽  
Vincent Arkesteijn ◽  
Bram Nauta
Keyword(s):  
Dynamic Spectrum Access ◽  
Cognitive Radios ◽  
Dynamic Spectrum ◽  
Spectrum Access

Cognitive radios for dynamic spectrum access: from concept to reality

2010 ◽  
Vol 17 (6) ◽  
pp. 64-74 ◽  
Author(s):  
Kang Shin ◽  
Hyoil Kim ◽  
Alexander Min ◽  
Ashwini Kumar
Keyword(s):  
Dynamic Spectrum Access ◽  
Cognitive Radios ◽  
Dynamic Spectrum ◽  
Spectrum Access

Cognitive Radio as Enabling Technology for Dynamic Spectrum Access

2013 ◽  
Vol 347-350 ◽  
pp. 1716-1719 ◽  
Author(s):  
Nai Qi Wei ◽  
Zi Li Chen
Keyword(s):  
Cognitive Radio ◽  
Dynamic Spectrum Access ◽  
Cognitive Radios ◽  
Dynamic Spectrum ◽  
Communication Link ◽  
Spectrum Access ◽  
Enabling Technology ◽  
Communication Techniques ◽  
Free Spectrum ◽  
Spectrum Scarcity

Frequency spectrum scarcity is currently one of the mostly discussed topics in wireless communications. When there is no free spectrum available, no new broadband communication techniques can be put into operation. The double use of already assigned frequencies leads to interferences. A possible solution to the problem is Dynamic Spectrum Access (DSA), realized through Cognitive Radio (CR) technology. Cognitive Radios have the ability to detect unused spectrum segments and to adapt to it dynamically. This adaptation does not only concern a change of frequency, but may also include changes in waveform, bandwidth, or whatever leads to an optimal communication link. This paper gives an overview of the state-of-the-art Cognitive Radio approaches and points out opportunities offered by this technology to overcome the threat of spectrum scarcity.

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