Title :
Windowed DFT based pilot-symbol-aided channel estimation for OFDM systems in multipath fading channels
Author :
Yang, Baoguo ; Letaief, K.B. ; Cheng, Roger S. ; Zhigang Cao
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
We propose a windowed DFT based pilot-symbol-aided channel estimation method for orthogonal frequency division multiplexing (OFDM) systems. This method can reduce the aliasing error of the direct DFT based channel estimation method in the multipath fading channels that have non-sample-spaced path time delays. Furthermore, we compare the proposed channel estimator with the more complex MMSE channel estimator. The performance of the proposed method is close to the MMSE channel estimator
Keywords :
OFDM modulation; delays; discrete Fourier transforms; fading channels; land mobile radio; multimedia communication; multipath channels; parameter estimation; personal communication networks; MMSE channel estimator; OFDM systems; aliasing error reduction; direct DFT based channel estimation; mobile multimedia transmission; multipath fading channels; nonsample-spaced path time delays; orthogonal frequency division multiplexing; pilot-symbol-aided channel estimation; windowed DFT; wireless personal communication systems; Channel estimation; Delay effects; Discrete Fourier transforms; Fading; Filters; Frequency domain analysis; Frequency estimation; Frequency response; Interpolation; OFDM;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851372
