A few words on the second edition. By a nice coincidence, Springer's proposal to revise the
book came when I was giving a serious thought to the idea. Ten years have passed and my …

This paper addresses the recursive minimum-variance filtering problem for a class of two-
dimensional shift-varying systems with stochastic nonlinearity and degraded measurements …

In this work, we propose a novel method for quantifying distances between Toeplitz
structured covariance matrices. By exploiting the spectral representation of Toeplitz …

This paper presents a design approach for a class of rotationally invariant 2D filters of finite
impulse response (FIR) type, which may form circular filter banks with imposed …

The impulse response coefficients of a two-dimensional (2-D) finite impulse response (FIR)
filter are in a matrix form in nature. Conventional optimal design algorithms rearrange the …

The solution to minimax design of 2-D finite-impulse response filter is not necessarily
unique. This paper presents a sequential constrained least-square (SCLS) method to obtain …

We discuss a method for multidimensional FIR filter design via sum-of-squares formulations
of spectral mask constraints. The sum-of-squares optimization problem is expressed as a …

We give a survey of recent results on positive trigonometric sums. Far-reaching extensions
and generalizations of classical results are presented. We provide new proofs as well as …

In this note, a sufficient condition is derived for the stability of a spatially invariant distributed
dynamical system, based on the geometrical structure of the null space of a matrix …

This paper explores an application of the sigmoidal function—the complementary integral
Gaussian error function (erfc (.))—in two-dimensional (2D) uniform and nonuniform filter …