Weighted ESAE channel estimation method for OFDM systems

OFDM (orthogonal frequency division multiplexing) is a promising technique for achieving the high-bit-rates required by a wireless multimedia service over the time-dispersive multipath channel. The PSAM (pilot-symbol assisted modulation) technique is a common OFDM system channel estimation method which uses time and frequency correlation of the channel. The ESAE (extended symbol aided estimation) method has more robust features in a fast fading channel, but it has an unstable property in a high-speed environment. The paper proposes a weighted ESAE channel estimation method which is based on the conventional ESAE method. In time and frequency selective channels, this method has a low algorithm complexity and short processing delay, and the BER performance is better than the conventional ESAE and PSAM methods.