【摘要】 正交频分复用(OFDM)是实现无线多媒体通信的核心技术,信道估计是OFDM系统的关键技术之一.提出了一种改进的基于离散余弦变换(DCT)的OFDM信道估计算法.算法对序列尾部的插值进行了改进,将得到的信道估计变换到时域,通过平均的方法进一步提高了信道估计性能.仿真结果显示,改进的DCT插值信道估计方法比常规算法性能更优,系统性能得到改善.更多还原

【Abstract】 Orthogonal frequency division multiplexing(OFDM) is a key technology in wireless multimedia communication.The information channel estimation is a key technology in OFDM system.This paper proposes an improved information channel estimation algorithm based on the discrete cosine transformation(DCT).This algorithm improves interpolation performance of sequence tail.When the information channel estimation results were transformed to time domain,the property of information channel estimation was further improved by average method.Simulation results show that the proposed method is better than the traditional method.更多还原