Highly Effective Algorithm of the Threshold Detection in the Cognitive Radio

Qing Long Xu (PLA University of Science and Technology)
Zhan Gao (PLA University of Science and Technology)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 12, No 6: June 2014

Opportunistic spectrum access (OSA) is a key technique enabling the secondary users (SUs) in a cognitive radio (CR) network to transmit over the “spectrum holes” unoccupied by the primary users (PUs). In contrast to OSA, with spectrum sharing (SS) is allowed to transmit regardless of the PU’s on/off status, provided that the resulting interference to PU is kept below a predefined threshold. In this paper, we focus on the threshold detection algorithm study for spectrum sharing, which aims to get the SIR of the PUs as quickly and precisely as possible. We propose a dichotomy algorithm with lower complexity and more quickly in contrast to the traditional full search algorithm. Numerous simulation results are provided to validate the proposed algorithm. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5489