Novel channel estimation for OFDM-based WLAN receivers

WLAN (wireless local area network) access providing high data rate has recently been deployed and worldwide extended. Most of WLAN standards are OFDM-based (orthogonal frequency division multiplexing) because of the good behavior of this technique in multi-path radio channels. However, several aspects have to be taken into account when an OFDM system is implemented. One of the most critical issues is the channel estimation problem at the receiver side. Novel channel estimation method and its efficient implementation at the receiver become crucial in OFDM-based high-speed WLAN systems. This paper deals with the efficient channel estimation problem at the receiver, and a novel smoothing-assisted channel estimation scheme is proposed for the OFDM-based WLAN systems. Simulation results are used to illustrate the performance of the proposed scheme.