DocumentCode :
2455018
Title :
AOA Estimation Based on MP Algorithm in Beam-Space Using Rotational Invariance Technique
Author :
Yu Yang ; Wang Jiang-ying
Author_Institution :
Southwest Jiaotong Univ., Chengdu
fYear :
2007
fDate :
23-27 Sept. 2007
Firstpage :
13
Lastpage :
17
Abstract :
A novel algorithm using Rotational Invariance technique for AOA estimation is presented in this paper, which is based on sparse decomposition of signal, and applied into beam-space against the deficiencies of traditional DF algorithms and sub-space algorithms. The former methods are widely used in actual applications. However, they have many drawbacks such as low-resolution, bad robustness and etc. The latter ones which base on subspace method have gained great interest in the past two decades. What we know about this kind of methods are their super-resolution quality and their weaknesses as well, e.g. constrained by the number of elements, behaving badly when correlativity of sources grows. Approach proposed in this paper fist constructs atom-dictionaries using outputs of second sub-array and then transforms observations of fist sub-array and dictionaries in array-space to beam-space, and finally obtains AOAs through thinning sectors by solving least squares problems. Numerical simulations have proved the effectivity of the algorithm and good performance in low signal-to-noise ratio (SNR) regime.
Keywords :
array signal processing; direction-of-arrival estimation; least squares approximations; signal resolution; AOA estimation; SNR; array-space; beam-space; least squares problems; matching pursuit algorithm; rotational invariance technique; signal sparse decomposition; signal-to-noise ratio; sparse decomposition; sub-space algorithms; super-resolution quality; Adaptive arrays; Atomic beams; Dictionaries; Least squares methods; Matching pursuit algorithms; Pursuit algorithms; Robustness; Signal resolution; Signal to noise ratio; Vectors; AOA; Matching Pursuit; Rotational Invariance technique; Sparse Decomposition;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Design and Its Applications in Communications, 2007. IWSDA 2007. 3rd International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-1074-3
Electronic_ISBN :
978-1-4244-1074-3
Type :
conf
DOI :
10.1109/IWSDA.2007.4408341
Filename :
4408341
Link To Document :
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