Title :
On coded pilot based channel estimation for OFDM in very fast multipath fading channel
Author :
Ng, Wee Teck ; Dubey, Vimal K.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
This paper proposes a novel channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) system based on comb-type of coded clusters of pilots. It is not only able to estimate the channel response due to immediate subcarriers, but also the amount of inter-carrier-interference (ICI) from other subcarriers. The algorithm is suitable for OFDM system in very fast time varying channel, where ICI is significant. The criteria for selecting the optimum coded pilot sequence for each of the cluster is also presented. The mean square error (MSE) of the estimate using the proposed algorithm is also derived. The simulation results clearly show that the proposed algorithm outperforms the conventional channel estimation algorithm.
Keywords :
OFDM modulation; Rayleigh channels; channel estimation; mean square error methods; multipath channels; time-varying channels; ICI; MSE; OFDM system; channel estimation algorithm; inter-carrier-interference; mean square error; optimum coded pilot sequence; orthogonal frequency division multiplexing; time varying channel; Bandwidth; Channel estimation; Clustering algorithms; Equalizers; Fading; Frequency division multiplexing; Interference; Multipath channels; OFDM; Partial transmit sequences;
Conference_Titel :
Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on
Print_ISBN :
0-7803-8185-8
DOI :
10.1109/ICICS.2003.1292579
