Title :
Adaptive Spectrum Sensing Algorithm Under Different Primary User Utilizations
Author :
Nan Wang ; Yue Gao ; Xing Zhang
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Queen Mary Univ. of London, London, UK
Abstract :
Spectrum sensing is one of the key technologies to realize dynamic spectrum access in cognitive radio (CR) systems. In this letter, a novel adaptive threshold spectrum sensing algorithm is proposed to achieve an efficient trade-off between the detection and false alarm probability. The proposed adaptive threshold algorithm demonstrates a better spectrum efficiency for both primary users (PUs) and secondary users (SUs) in comparison with the conventional fixed one. A closed-from expression between PUs´ spectrum utilization ratio and the proposed adaptive threshold is derived and simplified.
Keywords :
cognitive radio; probability; spread spectrum communication; adaptive threshold spectrum sensing algorithm; cognitive radio systems; dynamic spectrum access; false alarm probability; primary user utilizations; secondary users utilizations; Adaptation models; Algorithm design and analysis; Cognitive radio; Heuristic algorithms; Sensors; Signal to noise ratio; Cognitive radio; adaptive threshold; energy detection; spectrum sensing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.081313.131468
