Title :
Energy-Efficient Power Allocation for OFDM-Based Cognitive Radio Systems with Imperfect Spectrum Sensing
Author :
Pei, Errong ; Wang, Sheng ; Zhang, Zhizhong
Author_Institution :
Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Based on existing sensing technology, namely imperfect spectrum sensing, we study an energy efficient power allocation problem for OFDM-based cognitive radio systems, and its optimal solution is derived, and further an energy efficient power allocation scheme is proposed. The proposed scheme can not only save valuable resource such as battery life by selectively allocating power to underutilized sub carriers, but also fully make use of the limited spectrum resource.
Keywords :
OFDM modulation; cognitive radio; OFDM; cognitive radio systems; energy-efficient power allocation problem; imperfect spectrum sensing; spectrum resource; Cognitive radio; Convex functions; Educational institutions; Interference; OFDM; Resource management; Sensors;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6036682
