Channel Estimation In Broadband Wireless Access System

The combination of OFDM with space-time coding has received much attention recently to combat multi-path delay spread and increase system capacity over wireless communication systems, channel parameters are needed in order to coherently decode the transmitted signal. In this paper, the IEEE802.16e was introduced concisely,the principle of MIMO-OFDM system based on the IEEE802.16e also analyzed. Furthermore, the channel estimation technique in that MIMO-OFDM system is investigated, with the emphasis on training sequence-based and pilot-based channel estimation methods, and algorithms are given respectively. As a very active also several basic and improved algorithms are given respectively. Finally, the analysis and comparison of these algorithms is made by computer simulation.