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Presenter: Yihai Zhang
Supervisor: Dr. Wu-Sheng Lu and Dr. T. A. Gulliver

Date: Fri, August 12, 2011
Time: 10:00:00 - 11:00:00
Place: EOW 230

ABSTRACT

Abstract:

In this presentation, we first focuses on the development of intercarrier interference (ICI) reduction and signal detection algorithms for OFDM systems over time-varying channels. Several ICI reduction algorithms are proposed for OFDM systems over doubly-selective channels. Next, a low complexity joint semiblind detection algorithm based on the channel correlation and noise variance is proposed.

This presentation also focuses on how to obtain accurate channel state information for coherent detection of the transmitted signals. First, a channel estimation method is developed to utilize the noncircularity of the input signals to obtain an estimate of the channel coefficients. Thus it allows blind polynomial channel estimation using second-order statistics of the OFDM symbol. Furthermore, a time-domain channel estimation method is presented for OFDM systems over sparse channels using compressive sensing.