DocumentCode :
3473381
Title :
Improving the performance of AR estimation of near-field signal sources by decimation
Author :
Moghaddar, A. ; Walton, E.K.
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fYear :
1993
fDate :
1-3 Aug. 1993
Firstpage :
395
Lastpage :
398
Abstract :
The problem of locating signal sources in the near-field of a linear sensory array is considered. To locate near-field signal sources, the overall array is divided into a number of smaller subarrays. The direction-of-arrival (DOA) of the signal for each subarray is then determined from an autoregressive (AR) modeling of the subarray data. It was previously shown that in AR parameter estimation. decimation will increase the capability of the power spectral density in resolving closely spaced sinusoids. It is shown that decimation, in addition to providing higher resolution (ability to separate two nearby peaks), also decreases the DOA perturbations caused by perturbations in the pole location estimates. Effects of decimation in locating near-field signal sources are presented with an example of simulated fields for a combination of near- and far-field sources.<>
Keywords :
parameter estimation; signal processing; AR parameter estimation; autoregressive modelling; decimation; direction-of-arrival; linear sensory array; near-field signal sources; pole location estimates; signal processing; Parameter estimation; Signal processing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems Engineering, 1991., IEEE International Conference on
Conference_Location :
Dayton, OH, USA
Print_ISBN :
0-7803-0173-0
Type :
conf
DOI :
10.1109/ICSYSE.1991.161161
Filename :
161161
Link To Document :
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