For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
Decision-Directed Channel Estimation for QAM-Modulated OFDM Systems
Minjoong RIM Jaemin AHN Yeon-soo KIM
IEICE TRANSACTIONS on Communications
Publication Date: 2003/04/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
channel estimation, decision-directed, QAM, OFDM, wireless,
Full Text: PDF>>
When decision-directed channel estimation is used for QAM-OFDM systems, the optimal filter shape depends on the amplitudes of the modulated symbols as well as the channel characteristics. In this letter we propose a simple channel estimation method for multi-level-amplitude-modulated systems, which can effectively suppress the estimation variances with a small filter. Using the proposed method the implementation cost can be reduced and possibly better results might be obtained by avoiding the estimation bias due to large-sized filtering.