Abstract
The target and requirement of wireless communication technology are to transmit data fast and reliably. Channel estimation is the basis of coherent detection, demodulation and channel equalization. And it is also very important for OFDM (Orthogonal Frequency Division Multiplexing) technique to realize data communication at high speed. OFDM is one key technology in wireless communication. Considering the characteristics of OFDM communication system, this paper analyzes the channel estimation methods, discusses basic pilot-aided channel estimation methods, and provides comparisons of some typical channel estimation methods and their computer simulation results. In the end, future research directions are summarized.
Key words: Channel estimation; OFDM system; IEEE802.11a