摘要
导频辅助信道估计是OFDM系统常用的信道估计算法,本文研究基于变换域的导频辅助信道估计算法.在DFT插值法的基础上,提出了基于离散余弦变换(DCT)的信道估计方法.仿真结果表明,该插值算法的MSE和SER性能优于DFT方法.与MMSE算法相比,该插值算法计算复杂度低,易于物理实现.
The Pilot-Symbol Assisted Modulation （PSAM） is an usual channel estimation for OFDM systems. This paper addressed the PSAM channel estimation in transform domain interpolation. On the basis of DFT-based interpolation, the algorithm based on the theory of discrete cosine transform （DCT） was proposed for channel estimation. Simulation results showed that, as compared with the DFT-based channel estimator, the proposed interpolator achieves better performance of MSE and SER and it provides a performance similar to the MMSE channel estimation with significantly much lower computational complexity.
出处
《浙江大学学报（理学版）》
CAS
CSCD
北大核心
2008年第2期178-180,184,共4页
Journal of Zhejiang University（Science Edition）
