Optimal detection of a known signal in nonstationary noise requires tracking the eigenvalue decomposition (EVD) of the noise data over time. To take advantage of information in the long-term, as well as short-term, correlation lags we turn to EVD over wavelet subspaces. In this paper, we develop a multirate EVD updating method over multiresolution subspaces and find maximum detectability nodes ...

This paper addresses the calculation of moments of complex Wishart and complex inverse Wishart distributed random matrices. Complex Wishart and complex inverse Wishart distributed random matrices are used in applications like radar, sonar, or seismics in order to model the statistical properties of complex sample covariance matrices and complex inverse sample covariance matrices, respectively. ...

We are immersed in a high-tech computing environment, depending on its support to carry out our everyday tasks. Unfortunately, our rapidly increasing expectations of the intelligence of modern devices exceeds their abilities. We often expect devices to perceive their environment, understand our intent, and autonomously carry out appropriate tasks. This paper presents a hybrid genetic-fuzzy appr...

The topic of this paper arose out of a consideration of Costas sequences, which are used in sonar and radar applications. These sequences have the de/ning property that all di!erences of elements the same distance apart, are di!erent. Several in/nite families of Costas sequences are known; but there are many existence questions for length ¿ 32. In this article, we restrict ourselves to sequence...

Abstract Previous work using multibeam sonar to map diffuse hydrothermal flows is extended estimate the heat output of flows. In first step toward inversion, temperature statistics are obtained from data and compared thermistor in order set value an empirical constant. Finally, a simple model used obtain heat‐flux density sonar‐derived statistics. The method applied Cabled Observatory Vent Imag...

In the paper the conception of identification of underwater like mines objects was presented basis on images of underwater area. Methods of preliminary processing of images acquired by underwater vehicle and a method of seeking chosen elements on these images and their identification at using the Hougha transform were described. Moreover the results of preliminary processing and the results of ...

Our technical approach is aimed at two basic problems with undersea warfare: (1) knowing the environment, and (2) adapting the sensor to the environment to maximize sensor performance. A consequence of (1) in this approach is that the knowledge of the environment, along with accurate sensor performance models, provides more accurate feedback to an operator about current sensor performance, a re...