NDLI: QR-TLS ESPRIT for source localization and frequency estimations

Content Provider	IEEE Xplore Digital Library
Author	Tayem, N. Omer, M. Gami, H. Nayfeh, J.
Copyright Year	2013
Description	Author affiliation: ECET, ITT Tech. Inst., Owingmills, MD, USA (Gami, H.) \|\| Dept. of Electr. Eng., Prince Mohammad bin Fahd Univ., Al-Khobar, Saudi Arabia (Tayem, N.; Omer, M.; Nayfeh, J.)
Abstract	A subspace decomposition based algorithm for joint frequency of arrival (FOA) and direction of arrival (DOA) estimation is presented in this paper. The proposed method termed as QR-TLS ESPRIT, estimates the signal subspace by decomposing the received signal in a specially formed Toeplitz matrix. The structure of the matrix favors the application of QR factorization, which yields the signal subspace at the expense of less number of computations. A Total Least Squares (TLS) method is applied to obtain the frequency and angle estimates from the signal space. The proposed QR-TLS ESPRIT method provides several benefits: 1) It avoids the computations of applying computationally complex Eigen Value Decomposition (EVD) or Singular Value Decomposition (SVD) methods to obtain signal subspace alike conventional methods, 2) QR decomposition method, which is intrinsically applicable to numerical rank deficient problems, is used to extract signal subspace from the observation data matrix, 3) the TLS method is integrated with the QR which enhances the estimation accuracy in the presence of noisy measurements, 4) the proposed method can estimate the FOA and DOA from a small snapshot length of data which further reduces the computational time, and 5) the method works for both coherent as well as noncoherent sources without employing pre-whitening or spatial smoothing techniques. The performance of the proposed method is evaluated through simulations and the results are illustrated with respect to various received signal strength.
Sponsorship	IEEE Signal Process. Soc.
Starting Page	190
Ending Page	194
File Size	1228820
Page Count	5
File Format	PDF
e-ISBN	9781479923908
DOI	10.1109/ACSSC.2013.6810257
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Estimation Frequency estimation Matrix decomposition Direction-of-arrival estimation Arrays Joints Noise measurement QR-TLS ESPRIT Joint FOA and DOA
Content Type	Text
Resource Type	Article

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