Abstract
The future wireless mobile communication systems are aim to provide high-quality and high-rate mobile multimedia transmission. However, hostile multipath fading and time varying of radio conditions bring about complexity in channel character tracking. Orthogonal Frequency Division Multiplexing (OFDM), which is inherently resistant against inter-symbol interference (ISI), has therefore become the key technology of broadband high-speed wireless communication in future. Nevertheless, OFDM system is too vulnerable to channel estimation error. It is of great importance to estimate channel efficiently in OFDM system. And that is what this issue intended to do. High-speed, reliable, high spectrum efficiency of wireless transmission technology is a hot area of research for future mobile communications, orthogonal frequency division multiplexing (OFDM) technology has been proven to be an effective means of resistance to multipath fading and increase system capacity, and is more kind of wireless communication standards adopted. It has a more effective against inter-symbol interference(IS) caused by multipath propagation and high bandwidth efficiency, compared with the single carrier modulation has incomparable advantages in broadband wireless access.
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