Title :
Time-frequency training OFDM
Author :
Dai, Lin ; Wang, Zhen
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel transmission scheme called time-frequency training OFDM (TFT-OFDM) is presented, whereby time-domain training sequence and frequency-domain grouped pilots are used for the joint time-frequency channel estimation. The pilots only occupy about 1% of the used subcarriers, and the complex interference cancellation could be avoided. As a result, TFT-OFDM simultaneously achieves high spectral efficiency and reliable performance over fast fading channels.
Keywords :
OFDM modulation; channel estimation; fading channels; interference suppression; OFDM; complex interference cancellation; fast fading channel; frequency-domain grouped pilot; spectral efficiency; subcarrier; time-domain training sequence; time-frequency channel estimation; transmission scheme;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.2643
