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Presenter: Mr. Bojan Vrcelj - Digital Signal Processing Group, California Institute of Technology, Pasadena, California
Supervisor:

Date: Wed, May 14, 2003
Time: 14:30:00 - 15:30:00
Place: EOW 430

ABSTRACT

Abstract

For many years multirate signal processing has mainly been associated with the wavelet theory and the filter bank theory. Over the last couple of years, other important multirate concepts have been developed. These include biorthogonal partners and their extensions, namely Multiple Input Multiple Output (MIMO) and fractional biorthogonal partners. They have applications in several different areas, for example, signal interpolation, signal modeling and reconstruction, as well as channel equalization in digital communications. More recently, related multirate techniques have been applied in modern communication systems including precoding for multiuser (OFDM-like) systems and multiuser CDMA systems.

In the first part of this talk a brief overview of recent theoretical advances in multirate signal processing will be presented with special attention on biorthogonal partners and their extensions. The second part of the talk will focus on the current advances in the area of multiuser communications, namely, the Fractionally-Spaced AMOUR (FSAMOUR) CDMA systems. These represent a recent improvement of the AMOUR systems that employ some familiar multirate techniques.