IEEE802.16e系统中基于基扩展模型的快速时变信道估计.doc

文档介绍：
系统中基于基扩展模型的快速
时变信道估计
王香瑜,王毅
(重庆邮电大学通信与信息工程学院,重庆 400065)
摘要:随着通信要求的不断提高,正交频分多址系统逐渐向快移动速度、多子载波数、高载
波频率的方向发展,因此对快速时变信道进行估计及均衡的算法越来越受到广大研究人员的
重视。针对 IEEE 系统,采用基于基扩展模型估计其快速时变信道,使得接收机可
以在计算复杂度相对较低的情况下更为准确的估计信道,克服了传统信道估计算法估计性能
差和计算复杂度较高的缺点。仿真结果表明,基扩展模型信道估计算法性能明显优于传统的
LS 信道估计。
关键词:IEEE 系统;快速时变信道估计;基扩展模型
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文献标志码:A
Fast-varying channel estimation method based on basis
expansion models in IEEE systems
Wang Xiangyu, Wang Yi
(School of Information munication Engineering, Chongqing University of Posts and
munications, Chongqing 400065, China)
Abstract:With today’s increasing requirements munication technology, the moving speed
es more rapid and the number of sub-carriers is getting larger and the carrier frequency es
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 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 plexity, to e
the disadvantage of poor performance and plexity of traditional channel
estimation. The simulation results show that the BEM channel estimation algorithm has better
performance than the traditional LS channel estimati