Title :
Adaptive channel estimation using cyclic prefix in multicarrier modulation system
Author :
Wang, Xiaowen ; Liu, K. J Ray
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
Abstract :
Multicarrier modulation (MCM) is a promising technique for high rate data transmission and the channel estimation is very important for the implementation of MCM. We found that the cyclic prefix, originally used solely to reduce the intersymbol interference (ISI), can be viewed as a source of channel information. Based on this observation, we propose an adaptive channel estimation algorithm using the cyclic prefix. This algorithm can adaptively track the channel variation without additional training sequences.
Keywords :
adaptive estimation; data communication; identification; interference suppression; intersymbol interference; modulation; time-varying channels; DFT; ISI reduction; QAM constellation; adaptive channel estimation algorithm; channel identification algorithm; channel information; channel variation tracking; cyclic prefix; deterministic least squares; high rate data transmission; intersymbol interference; multicarrier modulation system; time varying channel; Channel estimation; Data communication; Discrete Fourier transforms; Equalizers; Frequency response; Intersymbol interference; Partitioning algorithms; Performance loss;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.798021
