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

fYear

2009

fDate

24-26 Sept. 2009

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/WICOM.2009.5303926

Filename

5303926