Title :
An Interference Mitigated and Power Efficient Adaptive Beamforming Algorithm in Cognitive Radio
Author :
Zhuang, Zhili ; Sohn, Sunghwan ; Gu, Junrong ; Kim, Jaemoung
Author_Institution :
INHA-WiTLAB, Inha Univ., Incheon, South Korea
Abstract :
By applying smart beamforming technologies, it is effective to protect primary user (PU) while guarantee that cognitive user (CU) has better spectrum sharing with PU in a rarely conflictual manner. In this paper, firstly, we implement direction of arrival (DOA) estimation for obtaining the location information of signals, then exploit uniform circular array antenna applying adaptive algorithm to achieve desired transmit beamforming gains in the required directions. The simulation results demonstrate that the proposed beamforming algorithm achieves desired beamforming pattern and higher power efficiency.
Keywords :
adaptive antenna arrays; array signal processing; cognitive radio; direction-of-arrival estimation; interference suppression; signal classification; circular array antenna; cognitive radio; cognitive user; cyclic MUSIC algorithm; direction of arrival estimation; interference mitigation; power efficient adaptive transmit beamforming algorithm; primary user protection; Adaptive algorithm; Adaptive arrays; Antenna arrays; Array signal processing; Cognitive radio; Direction of arrival estimation; Directive antennas; Interference; Protection; Transmitting antennas;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5303926
