Multilevel Filter Research Articles

Optimal data transmission filters

A common requirement in the design of multilevel data transmission filters is to provide a relatively large impulse response at t= t_M and near-zero responses at t = t_M + k ( k = any integer), in order to minimize intersymbol interference. This paper gives an analytic design procedure for a realizable filter that meets this requirement in an optimal manner and also optimizes other frequency and time domain criteria. The results are then extended to handle nonimpulsive inputs (which includes nonideal channels).

Filtering Of The Navier-Stokes Equations In TheContext Of Time-dependent Flows

The concepts of filtering and decomposition as applied to the analysis and modelling of turbulent flows are reviewed, starting from the seminal work of Reynolds. The problems arising from the use of finite spatial or time filters are discussed, and the recent approach based on the concepts of scale-similarity and multi-level filtering are presented. Finally, the possible extension of these ideas to finite time filtering is considered, with a view to developing turbulence models for time-dependent flows; a simple two-dimensional direct simulation of a turbulent free convective flow is used as an example.