Title :
On Channel Estimation Method Using Time Domain Sequences in OFDM Systems
Author :
Bo Liu ; Lin Gui ; Wenjun Zhang ; Bowei Song
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
In this paper, we propose a channel estimation method using time domain training sequences. Most recent works generally use a correlation scheme for channel estimation in OFDM systems with time domain sequences. However, the performance of this method is affected dramatically by the correlation characteristics and suffers from multipath interference. Rather than correlation analysis, we provide a new method based on least mean square (LMS) theory. The selection of parameter and corresponding schemes in time-varying channels as well as multipath channels with long time delay spreads are discussed too. Simulations of the new scheme and comparisons show its superiority over the conventional method.
Keywords :
OFDM modulation; channel estimation; least mean squares methods; time-varying networks; OFDM Systems; channel estimation method; least mean square; multipath channels; time domain sequences; Channel estimation; Discrete Fourier transforms; Fading; Frequency domain analysis; Frequency synchronization; Intersymbol interference; Least squares approximation; Multipath channels; OFDM; Time-varying channels; Channel estimation; LMS; TDS-OFDM; time domain sequences;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2008.2001723