Title :
Noncircularity-Rate Maximization: A New Approach to Adaptive Blind Beamforming
Author :
Xu, Yougen ; Liu, ZhiWen
Author_Institution :
Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China
Abstract :
A new adaptive beamforming scheme via noncircularity-rate maximization (NORM) is presented for blind recovery of a narrowband signal with nonzero noncircularity degree (such as AM, ASK and BPSK signals). By maximizing the noncircularity rate of the output signal, this new second-order blind beamformer can directly extract the signal of interest from circular interferences and noise (both are not necessarily Gaussian) without training signal and array calibration. This NORM approach can be implemented in a completely closed form and is shown to be attractive than the customary high-order statistics (HOS) strategy for blind noncircular signal extraction in terms of computation burdens and output signal-to-interference plus noise ratio (SINR).
Keywords :
adaptive signal processing; array signal processing; blind source separation; higher order statistics; interference (signal); noise; signal reconstruction; AM signal; ASK signal; BPSK signal; HOS strategy; NORM approach; SINR; adaptive blind beamforming scheme; array calibration; array signal processing; blind narrowband signal recovery; blind noncircular signal extraction; circular interference; customary high-order statistics strategy; nonGaussian noise; noncircularity-rate maximization; nonzero noncircularity degree; second-order blind beamformer; signal-to-interference-noise-ratio; training signal; Adaptive arrays; Array signal processing; Binary phase shift keying; Calibration; Interference; Narrowband; Sensor arrays; Signal processing; Signal processing algorithms; Signal to noise ratio;
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.2009.5305182
