摘要
正交频分复用(OFDM)是一种多载波调制技术,它能有效地克服多径干扰和码间串扰,是第四代移动通信的核心技术。作者首先简要介绍了OFDM的基本原理,重点研究了二维维纳滤波信道估计算法,考虑到算法复杂度和性能之间的折衷,进一步研究了2×1-D维纳滤波信道估计算法。仿真结果显示:2×1-D维纳滤波算法能够在保持良好性能情况下有效降低算法的复杂度。
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique. OFDM has a good performance in dealing with multi-path disturbance and inter symbol interference (ISI) ,it is the key technology of 4G in the field of mobile communication. In this paper, OFDM basic principle was briefly introduced. Then, 2-D Wiener filtering algorithm was emphatically studied. Thirdly, 2 × 1-D Wiener filtering algorithm was studied for the tradeoff between performance and complexity. The simulation results showed that 2 ×1-D Wiener filtering algorithm reduced the complexity remarkably with performance slightly degraded.
出处
《陕西科技大学学报(自然科学版)》
2006年第3期110-113,共4页
Journal of Shaanxi University of Science & Technology