In the compression of color or multispectral imagery, intra pixel color transforms are usually employed to decorrelate planes. It is usually thought that plane decorrelation (such as provided by the KLT) may lead to higher compression. Spatial correlation, however, is usually not considered. We developed a method to devise a pixel-wise color transform that takes into acount spatial correlation ...

This paper presents techniques to address static and dynamic errors in high performance continuous-time (CT), modulators. The inter-symbol interference (ISI)model is presented and existing ISI reduction techniques are reviewed. A novel technique has been presented which can high-pass shape both static mismatch and ISI error of each element of a multi-bit DAC while decorrelating the instantaneou...

|We have shown previously that non-stationary signals recorded in a static multi-path environment can often be recovered by simultaneously decorrelating varying second order statistics. As typical sources are often moving, however, the multi-path channel is not static. We present here an on-line gradient algorithm with adaptive step size in the frequency domain based on second derivatives, whic...

The performance of several decorrelating transforms is evaluated in the JPEG-2000 baseline system. The transforms considered are based on uniform parallel 2-channel and 8-channel lter banks and discrete cosine transform (DCT) building blocks. Through the analysis of lossy compression results, a system employing a combination of 8-channel and 2-channel lter banks is found to perform best overall...

This paper proposed a solution to the Finite Escape Time problem in H∞ Filter based Simultaneous Localization and Mapping problem. Finite escape time has been one of the obstacle that holding the realization of H∞ Filter in many application. For this reason, a method of decorrelating some of the updated state covariance of the filter is suggested to avoid the finite escape time from occurred du...

In net-neutral systems correlations between charge fluctuations generate strong attractive thermal Casimir forces and engineering these forces to optimize nanodevice performance is an important challenge. We show how the normal and lateral thermal Casimir forces between two plates containing Brownian charges can be modulated by decorrelating the system through the application of an electric fie...

This paper adresses the problem of improving convergence rate of sign algorithms. For such purpose, the idea of decorrelating signals used to pilot the adaptive algorithm is investigated. More precisely, two major modifications are carried : both input and error signals are filtered and the adaptation process is carried each two iterations. The novel algorithm is called “Pre-whitened Sign Algor...

Blind source separation algorithms typically involve decorrelating time-aligned mixture signals. The usual assumption is that all sources are active at all times. However, if this is not the case, we show that the unique pattern of source activity/inactivity helps separation. Music is the most obvious example of sources exhibiting repetitive structure because it is carefully constructed. We pre...

UMTS systems will employ long-code wideband CDMA modulation schemes. Receivers for this system are for computational reasons usually based on simple matched-filter techniques, and hence suffer from multiaccess interference. Decorrelating RAKE and MMSE receivers do not have this problem but, until now, were considered as too complex, due to the inversion of a large code matrix. As is shown in th...