Research Article
An Improved Channel Estimation Method for NC-OFDM Systems in Cognitive Radio Context
@INPROCEEDINGS{10.1109/ChinaCom.2011.6158137, author={Jia Min and Gu Mai and Wu Qun}, title={An Improved Channel Estimation Method for NC-OFDM Systems in Cognitive Radio Context}, proceedings={6th International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={3}, keywords={cr ofdm channel estimation}, doi={10.1109/ChinaCom.2011.6158137} }- Jia Min
Gu Mai
Wu Qun
Year: 2012
An Improved Channel Estimation Method for NC-OFDM Systems in Cognitive Radio Context
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2011.6158137
Abstract
Non-contiguous OFDM (NC-OFDM) system is popular as its characteristics of avoiding interference by licensed users detection in Cognitive Radio (CR) text. Some traditional channel estimation methods can not be applied to the NC-OFDM systems directly as its non-contiguous subcarrier. The improved time-domain channel estimation method which is different with the traditional LS and DFT channel estimation methods is proposed in this paper. It adopted the spectrum sensing based on CR context at the transmitter and receiver before the IFFT block and after the FFT blocks, respectively. The simulation results verify that the mean square error (MSE) and bit error rate (BER) performance outperform than those of the conventional schemes under the same condition.
