General precoder design for mitigation of intercarrier interference in OFDM mobile systems
- Author:
Xia WANG
;
Shihua ZHU
- Publication Type:Journal Article
- Keywords:
Intercarrier Interference;
precoder;
OFDM;
channel estimation
- From:
Journal of Pharmaceutical Analysis
2007;19(1):46-50
- CountryChina
- Language:Chinese
-
Abstract:
For orthogonal frequency-division multiplexing (OFDM) communication systems, the frequency offset in mobile radio channels distorts the orthogonality between sub-carriers, which results in Intercarrier Interference(ICI) and seriously degrades the performance of systems. Based on ICI coefficients analysis, a novel precoder design scheme is proposed for mitigation of ICI. In this technique, precoder matrix is designed by the way of linear counteraction and inserted in the former transmitter signal. Computer simulation results show that this new scheme can effectively reduce ICI and significantly provide the carrier-interference power ratio improvement. Compared with existing ICI mitigation schemes with channel estimation, the proposed scheme has lower computational complexity, and compared with self-cancellation scheme, the bandwidth efficiency can be improved in this proposed scheme. The proposed scheme also has better convergence stability for time-varying frequency selective fading channel.
