基于DCT的OFDM系统信道估计研究  

Research on OFDM channel estimation based on discrete cosine transform

作　　者：邸敬[1] 邵军花[1] 刘玉红[1] 

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070

出　　处：《信息技术》2010年第8期121-123,共3页Information Technology

摘　　要：根据DCT变换能量集中的特性,提出了一种基于DCT的OFDM系统信道估计改进方法。在分析了传统OFDM系统DFT实现的基础上,重点研究了基于DCT的OFDM系统,建立了仿真模型,并比较了基于DCT的OFDM系统和传统的OFDM系统的信道估计性能,通过在不同的信道估计方式下进行仿真分析,验证了基于DCT的OFDM系统信道估计性能更优。In this paper,the OFDM systems channel estimation method was improved founded on the characteristic of DCT transform energy concentration.It focused on the OFDM systems study on the basis of DCT which based on the DFT implementation of the traditional OFDM systems,established the simulation models with the channel estimation performance comparison of the OFDM systems on DCT and the traditional OFDM systems,made simulation analysis for the different channel estimation methods to verify that the channel estimation performance with the OFDM system based on DCT is more superior.

关 键 词：正交频分复用(OFDM) 离散余弦变换(DCT) 信道估计 

分 类 号：TN914[电子电信—通信与信息系统]