Channel Estimation Based on Pilot-Free Method for Mobile OFDM Systems

Since introduces intercarrier interference (ICI) is the well-known main barrier of upgrading transmission performance for mobile OFDM systems, pilot-aided technique is regarded as the effective solution even some efficient bandwidth has to sacrifice. Some others proposed blind and semi-blind method for the channel estimation utilizes certain underlying statistical properties of the transmitted data make systems becomes complexity. In this paper, an effective channel estimation and equalization method with pilot-free is proposed, which not only can significantly mitigate the ICI and improve the BER performance but also can upgrade the system transmission efficiency, with practicability. According to the Monte Carlo simulations, the empirical results show that our pilot-free method can approach same performance as the known channel results