Universal Spectral Estimation and Beamforming
Abstract
The first objective of this research project is to develop novel processing for passive sonar signalsusing ideas from Random Matrix,Theory (RMT) and universal algorithms. The second objectiveis to apply RMT to characterize the performance of existing passive sonar, beamformersand detectors. New algorithms, particularly those designed for large arrays and non-stationaryenvironments, have broad p,otential for transition to Navy systems. Improved performance predictionsfor adaptive passive sonar systems would provide important,guidelines for both tacticaland strategic planning in Anti-SubmarineWarfare. One way to detect and localize quiet targets atlonger r,anges is to increase the number of arrays or lengthen existing arrays. Implementation ofsignal processing algorithms for large array,s is challenging since the data required to train adaptivealgorithms scales with array size. Temporal variability of the underwater,environment limitsthe amount of training data. For autonomous applications,it is important to design processorsthat adjust parameter,s automatically or with minimal input from operators. Results from RMTare providing new insights about performance prediction for la,rge arrays operating in snapshotstarvedconditions. Universal algorithms offer new ideas for adjusting processing parametersbased on,observed data or possibly switching between conventional and adaptive processing dependingon the stationarity of the environment. Mo,tivated by these challenges, this project hasthree main topics of research: dominant mode rejection, universal spectral estimation a,nd beamforming,and Toeplitz covariance estimation. To address these topics, we will apply the latestRMT results, including a revised, spiked covariance model we are developing. We will test ourperformance predictions and proposed algorithms with ocean experimental,data.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 08, 2022
- Source ID
- N000142212750
Entities
People
- Kathleen E Wage
Organizations
- George Mason University
- Office of Naval Research
- United States Navy