DocumentCode :
418173
Title :
A novel wideband DOA estimation technique based on harmonic source model for a uniform linear array
Author :
Xiao, Yegui ; Ma, Liying ; Khorasan, K.
Author_Institution :
Hiroshima Prefectural Women´´s Univ., Japan
Volume :
3
fYear :
2004
fDate :
23-26 May 2004
Abstract :
Wideband direction of arrival (DOA) estimation problem has attracted a lot of attention in recent years due to its practical importance in many important areas. In this paper, a wideband DOA technique is proposed. This technique is based on two main ideas: (i) the correlation between the sensor measurements of a uniform linear array (ULA) and a sine or cosine waveform with known frequency forms a sequence that may be regarded as a sinusoidal signal with multiple frequencies associated with the time delays of all the sources; (ii) the DOA estimation can then be cast into a frequency estimation problem that may be solved by utilizing the AR model of a sinusoidal signal. The DOAs are identified by a grid search based on the estimated AR model. The new technique may be applied to both incoherent as well as coherent real-valued sources of harmonic or nonharmonic nature. Furthermore, the method does not require the use of the computationally intensive singular value decomposition (SVD) operation and the a priori knowledge of the number sources. It has been demonstrated through extensive simulations that the proposed technique is advantageous compared to the other commonly used techniques, such as the incoherent wideband MUSIC (IWM) and the coherent steered covariance matrix (STCM) based methods.
Keywords :
autoregressive processes; direction-of-arrival estimation; frequency estimation; waveform analysis; a priori knowledge; coherent real-valued source; coherent steered covariance matrix; cosine waveform; direction of arrival estimation; frequency estimation; grid search; harmonic nature; harmonic source model; incoherent real-valued source; incoherent wideband MUSIC; nonharmonic nature; sensor measurement; sine waveform; singular value decomposition; sinusoidal signal; time delay; uniform linear array; wideband DOA estimation; Computational modeling; Delay effects; Delay estimation; Direction of arrival estimation; Frequency estimation; Frequency measurement; Sensor arrays; Singular value decomposition; Time measurement; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
Type :
conf
DOI :
10.1109/ISCAS.2004.1328779
Filename :
1328779
Link To Document :
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