A new frequency-averaged MMSE estimator is proposed for multicarrier transmission schemes. The proposed estimator employs a new criterion of minimizing the mean square errors (MSE) over subcarriers, which provides an accurate channel estimation using a few pilot OFDM symbols without a priori channel knowledge. The proposed estimator has low complexity, since it uses high correlated adjacent subcarriers and neglects low correlated distant subcarriers. In the estimation process, intersymbol and intersubcarrier interference due to excess delay paths beyond guard interval is considered to achieve good performance. The simulation results showed that the frequency-averaged MMSE estimator can effectively reduce estimation error and keeps better performance than the conventional robust estimator in any channel conditions.
|ジャーナル||IEEE Vehicular Technology Conference|
|出版ステータス||Published - 2004 12月 1|
|イベント||2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States|
継続期間: 2004 9月 26 → 2004 9月 29
ASJC Scopus subject areas
- コンピュータ サイエンスの応用