基于DS-VCC-DDEA算法的短波信道均衡研究
Research into HF channel equalization based on DS-VCC-DDEA algorithm
田伟 1周新力 2初建崇 1郁成飞3
作者信息
- 1. 海军航空工程学院训练部,山东烟台264001
- 2. 海军航空工程学院电子信息工程系,山东烟台264001
- 3. 海军92095部队,浙江台州318000
- 折叠
摘要
针对判决反馈均衡器在低信噪比时存在误差传递、高信噪比时均衡效果好的特点,对窄带短波单音串行数据通信,在提出时变信道系数VCC-DDEA和判决反馈VCC-DDEA (DFE-VCC-DDEA)信道均衡算法的基础上,研究了利用实时信噪比估计指导信道均衡方式动态切换的DS-VCC-DDEA算法.该算法摒弃了传统DDEA算法中信道系数在一帧数据范围内恒定的假设,结合判决反馈均衡器的优点,可获取到信道均衡整体性能的提高.仿真结果验证了DS-VCC-DDEA相对DDEA、VCC-DDEA和DFE-VCC-DDEA算法的优越性.
Abstract
In allusion to the excellent performance for high SNR and error spread for low SNR,DS-VCC-DDEA is researched based on the proposition of VCC-DDEA and DFE-VCC-DDEA in Narrow-Band HF(High Frequency) single serial tone data communication,which is realized by switching the equalization algorithm between VCC-DDEA and DFE-VCC-DDEA guided by the real-time SNR estimation from the current frame.DS-VCC-DDEA not only abandons the hypothesis that the channel coefficients is constant for DDEA in the frame,but also avoids the short-back of DFE equalizer,and can fetch the integral performance improvement for different SNR.Simulation validates its advantage to DDEA,VCC-DDEA and DFE-VCC-DDEA.
关键词
窄带短波信道/信道估计/DDEA信道均衡/判决反馈均衡器/LU分解Key words
narrow-band HF channel/channel estimation/DDEA channel equalization/decision feedback equalizer/LU decomposition引用本文复制引用
出版年
2013
NETL
NSTL
万方数据