摘要
根据LTE下行链路系统的要求,在对传统信道估计算法的适用性进行分析后,针对DFT算法目前存在的非整数倍时延信道带来的频谱泄露和循环前缀内的噪声无法去除两种缺陷,通过加窗函数和设定阈值门限的方法依次对算法进行改进,最后用MATLAB对算法进行仿真分析,结果表明了改进的算法在基本不增加复杂度的前提下,提高了系统数据传输的准确率,更加适应于LTE系统,进而提高了整个系统的性能。
According to the requirements of the LTE downlink system, the applicability of the conventional channel estimation algorithm is analyzed. In order to improve the DFT algorithm, aiming at the drawbacks that the spectrum of non-integer multiple of the delay channel leakage and noise within the cyclic prefix can not be removed, the windowed function and the threshold are set. Using MATLAB for algorithm simulation and analysis, the results show that the improved algorithm improves the accuracy of data transmission system without increasing the complexity of the premise. It is more suitable for LTE systems and improves the performance of the entire system.
出处
《电视技术》
北大核心
2013年第3期113-117,共5页
Video Engineering
基金
国家自然科学基金项目(11062002)
