Abstract
We derive a Barankin-type bound (BTB) on the mean-square error (MSE) in estimating the directions of arrival (DOAs) of far-field sources using acoustic sensor arrays. We consider narrowband and wideband deterministic source signals, and scalar or vector sensors. Our results provide an approximation to the threshold of the signal-to-noise ratio (SNR) below which the performance of the maximum likelihood estimation (MLE) degrades rapidly. For narrowband DOA estimation using uniform linear vector-sensor arrays, we show that this threshold increases with the distance between the sensors. As a result, for medium SNR values the performance does not necessarily improve with this distance.
Original language | English |
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Article number | 5580114 |
Pages (from-to) | 431-435 |
Number of pages | 5 |
Journal | IEEE Transactions on Signal Processing |
Volume | 59 |
Issue number | 1 |
DOIs | |
State | Published - 1 Dec 2011 |
Keywords
- Acoustic sensor array
- Barankin bound
- acoustic vector sensor
- direction of arrival estimation
- threshold SNR
ASJC Scopus subject areas
- Signal Processing
- Electrical and Electronic Engineering