IEEE802.16e系统中基于基扩展模型的快速时变信道估计

With today’s increasing requirements to communication technology, the moving speed becomes more rapid and the number of sub-carriers is getting larger and the carrier frequency becomes higher in orthogonal frequency division multiple access (OFDMA). Therefore, the fast-varying channel estimates and equalizer algorithms are attracting more attention among researchers. According to the IEEE 802.16e system, this study uses the basis expansion model (BEM) to estimate its fast channel, so that the receiver can estimate the channel more accurately in a relatively low complexity, to overcome the disadvantage of poor performance and high computational complexity of traditional channel estimation. The simulation results show that the BEM channel estimation algorithm has better performance than the traditional LS channel estimation.