Conference Proceeding

Experimental Studies on Direction Finding Via Blind Beamforming

Inst. of Acoust. Eng., Northwestern Polytech. Univ., Xi'an;
01/2008; DOI:10.1109/CAMSAP.2007.4498020 ISBN: 978-1-4244-1713-1 In proceeding of: Computational Advances in Multi-Sensor Adaptive Processing, 2007. CAMPSAP 2007. 2nd IEEE International Workshop on
Source: IEEE Xplore

ABSTRACT Blind beamforming algorithms have the ability to recover the desired signals from array outputs without any prior knowledge of the array geometry. After blind separation of the signals, the DOAs can be estimated for each source individually. In this paper, the performance of the multistage constant modulus (CM) array, one of the most striking blind beamforming algorithms, for the source DOA estimation was analyzed via water tank experiments, and was compared to that of other DOA estimation algorithms including the 'non-blind' and the 'blind' algorithms. Results of water tank experiments showed that the multistage CM array can not only blindly recover the independent signal, but also correctly estimate the DOAs. The angle separating ability of the CM array was beyond the Rayleigh resolution limit.

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Keywords

'blind' algorithms
 
array geometry
 
array outputs
 
Blind beamforming algorithms
 
blind separation
 
CM array
 
desired signals
 
DOA estimation algorithms
 
DOAs
 
multistage CM array
 
multistage constant modulus
 
prior knowledge
 
Rayleigh resolution limit
 
source DOA estimation
 
striking blind beamforming algorithms
 
water tank experiments
 

Jie Zhuo