New Turbo Equalization Algorithm Using ICI Cancellation for OFDM Systems

Author

Gong, Guoqiang ; Xia, Ping

Author_Institution

Sch. of Comput. & Inf., Three Gorges Univ. of China, Yichang, China

fYear

2010

fDate

28-29 Oct. 2010

Firstpage

290

Lastpage

292

Abstract

Turbo equalization has been proved to effectively improve bit error rate (BER) over time varying channels. To improve the estimated accuracy of channel state information, we propose an iterative estimation by using pilots and soft decision signals; practically, the proposed algorithm is a minimum mean square error (MMSE) estimator. Furthermore, we propose a new turbo equalization schedule based on maximum a posteriori (MAP) probability demodulation algorithm with subtracting the inter carrier interference (ICI) terms, and it has low complexity.

Keywords

OFDM modulation; channel estimation; error statistics; intercarrier interference; iterative methods; least mean squares methods; maximum likelihood estimation; time-varying channels; turbo codes; ICI cancellation; OFDM system; bit error rate; inter carrier interference; iterative estimation; maximum a posteriori probability demodulation algorithm; minimum mean square error estimator; soft decision signal; time varying channel state information; turbo equalization algorithm; Bit error rate; Channel estimation; Demodulation; Frequency domain analysis; Iterative decoding; OFDM; MAP demodulation; OFDM; Turbo equalization; time varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligence Information Processing and Trusted Computing (IPTC), 2010 International Symposium on

Conference_Location

Huanggang

Print_ISBN

978-1-4244-8148-4

Electronic_ISBN

978-0-7695-4196-9

Type

conf

DOI

10.1109/IPTC.2010.51

Filename

5662438