Title :
A novel DOA estimation method and its focusing matrices for multiple wide-band sources
Author :
Feng, Xian ; Jianguo Huang ; Zhang, Qunfei ; Wang, Haiyan
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
In this paper a novel method for high resolution estimation of directions of arrival (DOA) of multiple wide-band sources is proposed. The key point of the coherent signal-subspace (CSS) is focusing which maps the signal subspaces of narrow-band components of a wide band signal onto a single signal subspace. The frequency-dependent modeling (FDM) introduces basic functions into array output signal to process directly the wide-band signal. We present a new DOA estimation method, named CSSFDM, which applies the coherent signal-subspace focusing to the frequency-dependent modeling. And several classes of focusing matrices used in CSSFDM are proposed in this paper. They are the diagonal matrix, the rotational signal-subspace (RSS) matrix and the robust focusing matrix. The estimation performance comparisons for various class of focusing matrices are also presented by computer simulation.
Keywords :
array signal processing; direction-of-arrival estimation; matrix algebra; numerical analysis; array output signal; coherent signal subspace; computer simulation; diagonal matrix; direction of arrival estimation method; focusing matrices; frequency dependent modeling; narrow band components; robust focusing matrix; rotational signal subspace matrix; single signal subspace; wide band signal; wide band sources; Cascading style sheets; Delay lines; Direction of arrival estimation; Educational institutions; Frequency estimation; Narrowband; Sensor arrays; Signal processing; Signal to noise ratio; Wideband;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281111
