Title :
Coexistence Strategies and Capacity Theorems of Interference Awareness Cognitive Radio
Author :
Yi, Na ; Ma, Yi ; Tafazolli, Rahim
Author_Institution :
Centre for Commun. Syst. Res., Univ. of Surrey, Guildford, UK
Abstract :
Interference awareness cognitive radio (IACR) is a special paradigm of cognitive radios, which utilizes spatial spectrum holes for frequency reuse. The primary contributions of this work are in two folds: 1) find the fundamental capacity limit of IACR with perfect channel side information; 2) find the achievable rate for the scenario, where the channel gain between the secondary transmitter and the primary receiver is not known, but the secondary transmitter has the localization information about all network nodes. Numerical results show the relationship between the channel capacity, rate penalty, outage probability, and channel gains. It is shown that the localization information can help the IACR system, but cannot offer comparable performance with the case with perfect channel side information.
Keywords :
cognitive radio; error statistics; spread spectrum communication; capacity theorems; channel capacity; channel gain; coexistence strategies; frequency reuse; interference awareness cognitive radio; outage probability; perfect channel side information; primary receiver; rate penalty; secondary transmitter; spatial spectrum holes; Channel capacity; Cognitive radio; Communication systems; FCC; Frequency; Information theory; Radio spectrum management; Radio transmitters; Radiofrequency interference; Receivers;
Conference_Titel :
Communications Workshops, 2009. ICC Workshops 2009. IEEE International Conference on
Conference_Location :
Dresden
Print_ISBN :
978-1-4244-3437-4
DOI :
10.1109/ICCW.2009.5207989
