Title :
Performance analysis of channel estimation in OFDM systems
Author :
Kim, Jihyung ; Park, Jeongho ; Hong, Daesik
Author_Institution :
Dept. of Electr./Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
We investigate an analysis of channel estimation using an interpolation technique in orthogonal frequency division multiplexing systems. Then a criterion for the adaptive interval of pilot subcarriers is derived. The mean-square error (mse) of comb-type estimators is dominated by the length of channel delay and the interval of pilot subcarriers. Analysis shows that the mse performance of comb-type estimators with the adequate interval of pilot subcarriers is better than that of block-type estimator for indoor channels.
Keywords :
OFDM modulation; channel estimation; delays; indoor radio; interpolation; mean square error methods; OFDM system; channel delay length estimation; comb-type estimator; indoor channel; interpolation technique; mean-square error; orthogonal frequency division multiplexing system; pilot subcarrier; Channel estimation; Delay estimation; Frequency division multiplexing; Frequency estimation; Interpolation; OFDM; Performance analysis; Robustness; Time varying systems; Wireless communication;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2004.839699
