NDLI: Uniformly robust mean-squared error beamforming

Content Provider	IEEE Xplore Digital Library
Author	Eldar, Y.C. Nehorai, A.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel (Eldar, Y.C.; Nehorai, A.)
Abstract	We consider the problem of designing a linear beamformer to estimate a source signal s(t) from array observations, where the goal is to obtain an estimate s/spl I.cap/(t) that is close to s(t). Although standard beamforming approaches are aimed at maximizing the signal-to-interference-plus-noise ratio (SINR), maximizing SINR does not guarantee a small mean-squared error (MSE), hence on average a signal estimate maximizing the SINR can be far from s(t). To ensure that s/spl I.cap/(t) is close to s(t), we propose using the more appropriate design criterion of MSE. Since the MSE depends in general on s(t) which is unknown, it cannot be minimized directly. Instead, we suggest two beamforming methods that minimize a worst-case measure of MSE. We first consider a minimax MSE beamformer that minimizes the worst-case MSE. We then consider a minimax regret beamformer that minimizes the worst-case difference between the MSE using a beamformer ignorant of s(t) and the smallest possible MSE attainable with a beamformer that knows s(t). We demonstrate through numerical examples that the proposed minimax methods outperform several existing standard and robust beamformers, over a wide range of SNR values.
Starting Page	362
Ending Page	366
File Size	928461
Page Count	5
File Format	PDF
ISBN	0780385454
DOI	10.1109/SAM.2004.1502970
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-18
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Robustness Array signal processing Signal to noise ratio Signal design Minimax techniques Sensor arrays Amplitude estimation Estimation error Interference cancellation Spectral analysis
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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