Title :
Robust Iterative Channel Estimation for OFDM Packet Transmission System
Author :
Im, Se Bin ; Choi, Hyungjin
Author_Institution :
Dept. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon
Abstract :
In this paper, we propose a simple and robust iterative channel estimation algorithm in OFDM packet transmission systems. Iterative scheme with channel update process is effective to reduce the packet error rate. However, conventional iterative structure has a limit on improving the performance because error propagation often occurs while updating the channel in the low SNR. In order to overcome this problem, we introduce a novel moving average filter to enable estimating the channel more reliably. Simulation results show that the proposed algorithm outperforms the conventional scheme. In particular, combined performance of the proposed algorithm and the noise reduction method[1] is close to MMSE channel estimation algorithm.
Keywords :
OFDM modulation; channel estimation; filters; iterative methods; moving average processes; packet radio networks; OFDM packet transmission system; channel update process; moving average filter; robust iterative channel estimation; wireless communication system; Bandwidth; Channel estimation; Error analysis; Fading; Filters; Iterative algorithms; OFDM modulation; Quadrature phase shift keying; Robustness; White noise;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.316
