摘要
单载波频域均衡技术以其能够有效避免单载波时域均衡复杂度过大,以及正交频分复用技术峰均比较高的不足,而成为宽带无线接入系统物理层的重要组成技术。本文研究了SC-FDE系统中的最小均方误差判决反馈均衡(MMSE-DFE)和基于LMS准则的自适应均衡算法,MATLAB仿真表明,由于LMS自适应均衡算法能有效的跟踪信道变化并更新均衡器的抽头系数,其性能略优于最小均方误差判决反馈均衡算法。
Single carrier frequency domain equalization technology is an important component of physical layer technology for broadband wireless access system, which can effectively avoid the lack of great complexity for single-carrier time domain equalization, as well as the high PAPR for orthogonal frequency division multiplexing. The minimum mean-square-error decision feedback equalization （MMSE-DFE） and adaptive equalization algorithm based on LMS criterion in SC-FDE system were studied in this paper. Simulation of MATLAB shows that, as the LMS adaptive equalization algorithm can effectively track the channel change and update the equalizer tap coefficients, its performance is superior to the minimum mean-square-error decision feedback equalization Algorithm.
出处
《信息通信》
2009年第6期19-22,共4页
Information & Communications
关键词
SC—FDE
最小均方误差判决反馈均衡
LMS准则
自适应均衡
single carrier frequency domain equalization （SC-FDE）
Minimum mean-square-error decision feedback equalization （MMSE-DFE）
LMS standards
Adaptive equalization
