Biorthogonal modulated lter banks when compared to paraunitary ones provide the advantage that the overall system delay can be chosen independently of the lter length thus resulting in low delay lter banks They have recently been studied by several authors In the paper we connect di erent design methods quadratic constrained least squares optimization cascade of sparse self inverse matrices and...

Nonsmooth optimization is applied to the design of transmitter and receiver lters for data transmission. This optimization method allows tradeoos between several performance measures{ISI, transmitter lter average power output, and receiver lter power gain. An FCC mask constraint on the transmitter lter is imposed. An example illustrates the design method.

Particle lters are becoming increasingly important and useful for state estimation in nonlinear systems. Many lter versions have been suggested, and several results on convergence of lter properties have been reported. However, apparently a result on the convergence of the state estimate itself has been lacking. This contribution describes a general framework for particle lters for state estima...

In this paper, uniform, critically decimated lter banks are used to approximate nonuniform lter banks wherein di erent lters have approximately the same magnitude response, but di erent phase, thus forming a linear periodically timevarying lter whose characteristics are similar to those of a nonuniform bank. This is done by post-processing a number of selected subbands of a uniform bank using a...

Generalized Lapped Orthogonal Transform (GenLOT) based image coder is used to compress 2-D seismic data sets. Its performance is compared to the results using wavelet-based image coder. Both algorithms use the same state-ofthe-art zerotree coding for consistency and fair comparison. Several parameters such as lter length and objective cost function are varied to nd the best suited lter banks. I...

The possibility of the compensation of amplitude and phase errors of data acquisition channels is investigated. The complex passband error can be signiicantly reduced by an appropriate digital lter, as it is illustrated on the example of a dynamic signal analyzer. The aspects of IIR and FIR equalizers are studied: it turns out that for the given anti-aliasing lter (Cauer lter, order 11) an FIR ...

We have implemented a four-tap adaptive lter in a continuous-time analog VLSI circuit. Since an ideal delay is impossible to implement in continuous-time hardware, we implemented the delay line as a cascade of low-pass lters (called the Gamma lter). Since many years of research in our lab has shown that the Gamma lter outperforms the delay line for a wide range of applications, the Gamma lter s...

This paper presents a generalization of the Canny–Deriche $lter for ramp edge detection with optimization criteria used by Canny (signal-to-noise ratio, localization, and suppression of false responses). Using techniques similar to those developed by Deriche, we derive a $lter which maximizes the product of the $rst two criteria under the constraint of the last one. The result is an in$nite len...

Scientists within the Long-Term Ecological Research (LTER) Network have provided leadership in ecological informatics since the inception of LTER in 1980. The success of LTER, where research projects span wide temporal and spatial scales, depends on the quality and longevity of the data collected. Scientists have devised data collection, data entry, data access, QA/QC and archiving strategies f...

A multi lter is a lter with matrix-valued coe cients, and is used in the processing of vector-valued signals, e.g. color images. Convolution becomes a vector sum of matrix-vector multiplication. In this paper, we e ciently implement a multi lter as a parallel combination of scalar lters. Each scalar lter works on one component of the input vector signal, which increases processing speed by the ...