Research Article
Low-Complexity Channel Estimation for OFDM Systems with Guard Subcarriers
@INPROCEEDINGS{10.1109/CHINACOM.2006.344886, author={Chaojun Li and Jianhua Zhang and Kunji Wang and Chen Huang and Ping Zhang}, title={Low-Complexity Channel Estimation for OFDM Systems with Guard Subcarriers}, proceedings={1st International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2007}, month={4}, keywords={}, doi={10.1109/CHINACOM.2006.344886} }- Chaojun Li
Jianhua Zhang
Kunji Wang
Chen Huang
Ping Zhang
Year: 2007
Low-Complexity Channel Estimation for OFDM Systems with Guard Subcarriers
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2006.344886
Abstract
In the actual orthogonal frequency division multiplexing (OFDM) systems since guard subcarriers are not used for transmission, some conventional channel estimators are not applicable. This paper, based on the criteria of least square (LS), proposes a novel channel estimation method for OFDM systems with guard subcarriers. The discrete Fourier transform (DFT)-based channel estimator can cause the aliasing error and high-frequency distortion when there exist guard subcarriers, but our proposed method can mitigate this problem and attain the better estimation performance with fewer pilots. Furthermore, compared with the conventional LS estimator, the proposed method has close performance but lower complexity and can be realized in the actual OFDM systems. Analyses and simulations demonstrate the effectiveness of the proposed approach.