東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Statistical signal processing for ra...

Wang, Jian.

Linked to FindBook

Google Book

Amazon

博客來

Statistical signal processing for radar in compound-Gaussian sea clutter.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Statistical signal processing for radar in compound-Gaussian sea clutter./
Author:	Wang, Jian.
Description:	163 p.
Notes:	Adviser: Arye Nehorai.
Contained By:	Dissertation Abstracts International68-06B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3268099
ISBN:	9780549071068

Statistical signal processing for radar in compound-Gaussian sea clutter.
Wang, Jian.

Statistical signal processing for radar in compound-Gaussian sea clutter. - 163 p.

Adviser: Arye Nehorai.

Thesis (Ph.D.)--Washington University in St. Louis, 2007.

In this dissertation, we address various problems of estimation, detection and optimal design in compound-Gaussian noise. Compound-Gaussian models are used in radar signal processmg to describe heavy-tailed clutter distributions. The important problems in compound-Gaussian clutter modeling are choosing the texture distribution, and estimatiog its parameters. Many texture distributions have been studied, and their parameters are typically estimated usmg statistically suboptimal approaches. We develop maximum likelihood (ML) methods for jointly estimating the target and clutter parameters in compound-Gaussian clutter using radar array measurements. In particular, we estimate (i) the complex target amplitudes, (ii) a spatial and temporal covariance matrix of the speckle component, and (iii) texture distribution parameters. Parameter-expanded expectation-maximization (PX-EM) algorithms are developed to compute the ML estimates of the unknown parameters. We also compute the Cramer-Rao bounds (CRBs) and related bounds on these parameters. We first derive general CRB expressions under an arbitrarv texture model then simphfy them for specific texture distributions. We consider the widely used gamma texture model, and propose an inverse-gamma texture model, leading to a complex multivariate t clutter distribution and closed-form expressions of the CRB. Especially, we apply the inverse-gamma texture model to real radar data and compare its estimation with the results using traditional method-of-moments (MoM). We optimally and adaptively design the polarimetry of the transmitting signal to minimize the determinant of the CRB of the target scattering matrix. We then derive a sequential detection method under compound-Gaussian clutter for two cases: known and unknown target parameters. We examine the relationship between several performance measures for the sequential detector, including the false-alarm rate and the average detection delay. We study and verify the results through numerical examples.

ISBN: 9780549071068Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Statistical signal processing for radar in compound-Gaussian sea clutter.
LDR:02884nam 2200265 a 45 001 948584
005 20110524
008 110524s2007 ||||||||||||||||| ||eng d
020 $a 9780549071068
035 $a (UMI)AAI3268099
035 $a AAI3268099
040 $a UMI $c UMI
100 1 $a Wang, Jian. $3 794935
245 1 0 $a Statistical signal processing for radar in compound-Gaussian sea clutter.
300 $a 163 p.
500 $a Adviser: Arye Nehorai.
500 $a Source: Dissertation Abstracts International, Volume: 68-06, Section: B, page: 4040.
502 $a Thesis (Ph.D.)--Washington University in St. Louis, 2007.
520 $a In this dissertation, we address various problems of estimation, detection and optimal design in compound-Gaussian noise. Compound-Gaussian models are used in radar signal processmg to describe heavy-tailed clutter distributions. The important problems in compound-Gaussian clutter modeling are choosing the texture distribution, and estimatiog its parameters. Many texture distributions have been studied, and their parameters are typically estimated usmg statistically suboptimal approaches. We develop maximum likelihood (ML) methods for jointly estimating the target and clutter parameters in compound-Gaussian clutter using radar array measurements. In particular, we estimate (i) the complex target amplitudes, (ii) a spatial and temporal covariance matrix of the speckle component, and (iii) texture distribution parameters. Parameter-expanded expectation-maximization (PX-EM) algorithms are developed to compute the ML estimates of the unknown parameters. We also compute the Cramer-Rao bounds (CRBs) and related bounds on these parameters. We first derive general CRB expressions under an arbitrarv texture model then simphfy them for specific texture distributions. We consider the widely used gamma texture model, and propose an inverse-gamma texture model, leading to a complex multivariate t clutter distribution and closed-form expressions of the CRB. Especially, we apply the inverse-gamma texture model to real radar data and compare its estimation with the results using traditional method-of-moments (MoM). We optimally and adaptively design the polarimetry of the transmitting signal to minimize the determinant of the CRB of the target scattering matrix. We then derive a sequential detection method under compound-Gaussian clutter for two cases: known and unknown target parameters. We examine the relationship between several performance measures for the sequential detector, including the false-alarm rate and the average detection delay. We study and verify the results through numerical examples.
590 $a School code: 0252.
650 4 $a Engineering, Electronics and Electrical. $3 626636
690 $a 0544
710 2 $a Washington University in St. Louis. $3 1017519
773 0 $t Dissertation Abstracts International $g 68-06B.
790 $a 0252
790 1 0 $a Nehorai, Arye, $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3268099