文档介绍：Proceedings of the Third International Conference on Machine Learning and ics, Shanghai, 26-29 August 2004
CHANNEL ESTIMATION FOR OFDM SYSTEMS BASED ON WAVELETS
NETWORK INTERPOLATION ALGORITHM
HAI-YUAN LIU, TAI-YI ZHANG, ZHI-GANG CHEN, FENG LIU
Department of Information munication Engineering, Xian Jiaotong University, Xian 7 10049,China
E-MAIL: { liuhaiyuan, chenzg, liufeng } ***@., tyzhang ***@.
Abstract: Minimum Mean-Square (MMSE). The second kind of pilot
For pilot symbol aided orthogonal frequency division arrangement provides better resistance to fast fading channel.
multiplexing (OFDM) systems. work interpolation b-type pilot channel estimation consists of channel
channel estimators are proposed ,compared to conventional estimation at pilot frequencies and channel interpolation in
methods. work interpolation channel estimator can frequency domain.
high rates
guarantee the transmission rate .and lower Bit error Radial Basis Function(RBF) network have been applied
(BER), Computer simulation demonstrates that the proped
channel estimation methods exhibit an improved performance in channel equalization [6][7], The MMSE estimate has
compared to the conventional linear channel estimation methods shown better performance than LS estimate. But it requires a
and are robust to fading rate, especially in fast fading channels. lar