Details

Autor(en) / Beteiligte

• Wen-Pin Chien
• Jen-Yuan Hsu
• Pang-An Ting
• Yuan-Hao Huang

Titel

Cooperative partial spectrum sensing with frequency diversity for cognitive radio

Ist Teil von

• 2009 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), 2009, p.546-549

Ort / Verlag

IEEE

Erscheinungsjahr

2009

Quelle

IEEE Xplore

Beschreibungen/Notizen

• In the cognitive radio system, one cognitive user (secondary user) has a limited capability of detecting the licensed primary user because of the hidden terminal problem; therefore, cooperation of the cognitive users is required to improve the spectrum sensing performance. Nevertheless, the cognitive users do not transmit data or voice all the time, and the idle cognitive users may consume massive spectrum sensing power instead of communication power. Therefore, we propose a partial FFT spectrum sensing method to reduce the cooperative spectrum sensing power. Moreover, we present two techniques, called detection result prediction (DRP) and decision result modification (DRM), to increase the detection accuracy based on the frequency-domain correlation and detection diversity. Simulation results show that the proposed technique can not only save about 50% computational complexity but also improve the detection performance.