Aggregation, Structural Change, and Cross-Section Estimation

Radar Cross-Section Estimation of SAR Images

We present an algorithm that is able to smooth out the speckle from many SAR images and which does not suuer from the drawbacks of multilooking. The algorithm is able to preserve the detail and resolution of the original image while producing a smooth, real-valued output. In many cases the quality of the smoothed image is suuciently high that it may be used with standard optical post-processing...

Precise Cross-Section Estimation on Tubular Organs

In this article we present a new method to estimate precisely the cross-section of tubular organs. Obtaining a precise cross-section is the critical step to perform quantitative analysis of those organs, for which diameter or area are often correlated to pathologies. Our estimation method, based on a covariance measure from the Voronoi cells of the set of studied points, can be computed either ...

Statistical Aggregation Analysis Characterizing Macro Functions with Cross Section Data

Robust Estimation and Monetary Policy with Unobserved Structural Change Unobserved Structural Change

This paper considers the joint problem of model estimation and implementation of monetary policy in the face of uncertainty regarding the process of structural change in the economy. We model unobserved structural change through time variation in the natural rates of interest and unemployment. We show that certainty equivalent optimal policies perform poorly when there is model uncertainty abou...

Estimation of Radar Cross Section of a Target under Track

In allocating radar beam for tracking a target, it is attempted to maintain the signal-to-noise ratio (SNR) of signal returning from the illuminated target close to an optimum value for efficient track updates. An estimate of the average radar cross section (RCS) of the target is required in order to adjust transmitted power based on the estimate such that a desired SNR can be realized. In this...