Title :
A new finite alphabet based blind channel estimation algorithm for OFDM systems
Author :
Ghaleb, Ibrahim ; Alim, O.A. ; Gomaa, Karim
Author_Institution :
Dept. of Electr. Eng., Alexandria Univ., Egypt
Abstract :
A new blind channel estimation algorithm is proposed based on the finite alphabet property of the transmitted symbols and the correlation between the channel attenuations at the adjacent subcarriers. The new method preserves the classical OFDM transmitter structure with cyclic prefix (CP) used in all standardized multicarrier systems (such as DAB, IEEE802.Ha, Hiperlan/2, etc.) as well as the newly proposed OFDM with zero padding (ZP). The new method proves via simulations to provide an unbiased channel estimates and its performance is independent of the channel zero locations.
Keywords :
OFDM modulation; channel estimation; correlation theory; mobile radio; radio transmitters; subcarrier multiplexing; OFDM system; OFDM transmitter; blind channel estimation algorithm; channel attenuation; channel zero location; correlation; cyclic prefix; finite alphabet property; standardized multicarrier system; transmitted symbol; zero padding; Attenuation; Blind equalizers; Channel estimation; Delay estimation; Digital audio broadcasting; Digital video broadcasting; Mathematical model; Multipath channels; OFDM; Transmitters;
Conference_Titel :
Radio Science Conference, 2004. NRSC 2004. Proceedings of the Twenty-First National
Print_ISBN :
977-5031-77-X
DOI :
10.1109/NRSC.2004.1321814
