DocumentCode :
417339
Title :
A novel partial adaptive broad-band beamformer using concentric ring array
Author :
Li, Yunhong ; Ho, K.C. ; Kwan, Chiman
Author_Institution :
Dept. of Electr. & Comput. Eng., Missouri Univ., Columbia, MO, USA
Volume :
2
fYear :
2004
fDate :
17-21 May 2004
Abstract :
The design of an adaptive concentric ring array for broadband beamforming is a challenge due to the large number of adapting coefficients. In this paper, the concept of setting the weights among different rings to enhance the beamformer output is used to design a partial adaptive ring array for applications in nonstationary signal environment. We decompose the weights of the array into two components: the weights for each receiving element within a ring and the weights for each ring. The partial adaptive array is obtained by setting the weight for each receiving element based on a priori knowledge of the direction of arrival (DOA) of the desired signal, and only the weights for each ring are adapted in real-time. The partial array design results in faster convergence rate, better performance and smaller amount of computation compared to a fully adaptive array. Experimental results demonstrate the advantage of the partial adaptive array design.
Keywords :
adaptive antenna arrays; array signal processing; broadband antennas; convergence of numerical methods; direction-of-arrival estimation; receiving antennas; DOA; concentric ring array; convergence rate; direction of arrival; nonstationary signal; partial adaptive broadband beamformer; performance; receiving element; weight decomposition; Adaptive arrays; Array signal processing; Background noise; Convergence; Design automation; Design optimization; Interference; Optimization methods; Signal design; Wrapping;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
0-7803-8484-9
Type :
conf
DOI :
10.1109/ICASSP.2004.1326223
Filename :
1326223
Link To Document :
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