Signal Classification Based on Cyclostationary Spectral Analysis and HMM/SVM in Cognitive Radio
ICMTMA '09 Proceedings of the 2009 International Conference on Measuring Technology and Mechatronics Automation - Volume 03
Joint power control and beamforming for cognitive radio networks
IEEE Transactions on Wireless Communications
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Cognitive Radios are proposed for secondary users (SU) recovering spectrum holes unused by primary users (PU) in time and space domain. However, the polarization domain of spectrum, allowing simultaneous frequency usage at overlapped areas, is unexploited adequately. In this paper, a novel polarization spectrum holes sensing scheme is proposed for cognitive radios, which exploits transmit and receive polarizations taking into account the interference constraint of PU and the signal to interference noise ratio (SINR) demands of SU. The scheme enables novel spectral sharing opportunities between PU and SU, thereby improving the spectrum utilization efficiency of the wireless communication networks. The scheme is evaluated based on the principle of Virtual Polarization Adaptation, and it has been concluded that the scheme is feasible.