Title :
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
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;
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
DOI :
10.1109/IPTC.2010.51
