DocumentCode :
1192490
Title :
Sensing in cognitive radio channels: A theoretical perspective
Author :
Gueguen, Lionel ; Sayrac, Berna
Author_Institution :
Orange Labs., Orange
Volume :
8
Issue :
3
fYear :
2009
fDate :
3/1/2009 12:00:00 AM
Firstpage :
1194
Lastpage :
1198
Abstract :
The cognitive radio paradigm is based on the ability of sensing the radio environment in order to make informed decisions. This paper describes the effects of sensing on the cognitive radio channels capacity region. Sensing is modeled as a compression channel, which results in partial knowledge of the primary messages at the cognitive transmitter. This model enables to impose constraints on the sensing strategy. First, the dirty paper channel capacity is derived when the channel encoder knows partially the side information. Then, the capacity area of the Gaussian cognitive channel with partial information is derived. Finally, numerical results illustrate the capacity reduction associated with constrained sensing, in comparison to the capacity of the cognitive radio channel.
Keywords :
Gaussian channels; channel capacity; channel coding; cognitive radio; data compression; wireless channels; Gaussian cognitive radio channel capacity; channel encoder; cognitive transmitter; compression channel; dirty paper channel capacity; sensing strategy; Availability; Channel capacity; Cognitive radio; Compressed sensing; Information theory; Radio transmitters; Relays; Signal processing; White spaces; Wireless communication; Cognitive radio; channel capacity; dirty paper coding; sensing;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2008.080663
Filename :
4801470
Link To Document :
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