Title :
Cognitive relay networks with underlay spectrum sharing and channel estimation error: Interference probability and BER analysis
Author_Institution :
Dept. of Telecommun. Eng., HoChi-Minh City Univ. of Technol., Ho Chi Minh City, Vietnam
Abstract :
This paper proposes accurate interference probability and bit error rate formulas for cognitive relay networks with underlay spectrum sharing and channel estimation error (CEE). Numerous results reveal that the CEE not only degrades the performance of secondary systems (SSs) but also increases interference power caused by SSs to primary systems (PSs), eventually unfavorable to both systems. A solution to further protect PSs from this effect through reducing the power of secondary transmitters is investigated and analyzed.
Keywords :
channel estimation; cognitive radio; error statistics; probability; radio spectrum management; radiofrequency interference; relay networks (telecommunication); BER analysis; CEE; PSs; SSs; bit error rate formulas; channel estimation error; cognitive relay networks; interference power; interference probability; primary systems; secondary system performance; secondary transmitters; underlay spectrum sharing; Analytical models; Bit error rate; Channel estimation; Fading channels; IP networks; Interference; Relay networks (telecommunications); Bit error rate (BER); channel estimation error (CEE); cognitive radio; interference probability (IP); relaying; underlay spectrum sharing (USS);
Journal_Title :
Communications and Networks, Journal of
DOI :
10.1109/JCN.2014.000050
