摘要
本研究主要探究了面向数字电视地面传输的单载波频域均衡系统的设计方法,并通过系统仿真验证均衡效果。单载波频域均衡系统采用了插入循环前缀的方式消除码间干扰达到补偿均衡目的,信道估计和迫零均衡是实现这一功能的关键。针对线性均衡器存在的弊端,本研究提出了一种非线性的判决-反馈均衡器,利用PN完成信道训练与跟踪后,可以实现对输入数据的均衡处理。使用SPW5.0信号处理仿真软件对单载波频域均衡系统进行了仿真,结果表明,在信道深度衰落的情况下,系统的均衡性能仍然保持良好,达到了理想的均衡效果,对提高数字电视地面传输信号质量有积极帮助。
This paper mainly discusses the design method of single carrier frequency domain equalization system for digital TV terrestrial transmission,and verifies the equalization effect through system simulation.The single carrier frequency domain equalization system uses the insert cycle prefix to eliminate the intersymbol interference to achieve the purpose of compensation equalization.Channel estimation and zero-forcing equalization are the keys to realize this function.Aiming at the disadvantages of linear equalizer,a nonlinear decision-feedback equalizer is proposed in this paper.After completing channel training and tracking by PN,the input data can be equalized.SPW5.0 signal processing simulation software is used to simulate the single carrier frequency domain equalization system.The results show that the equalization performance of the system is still good under the condition of deep fading channel,and the equalization effect is achieved,which is helpful to improve the signal quality of DTV terrestrial transmission.
作者
王星
Wang Xing(Shanxi Radio and Television Wireless Management Center,Taiyuan,China)
出处
《科学技术创新》
2023年第22期99-102,共4页
Scientific and Technological Innovation
关键词
数字电视
均衡器
单载波频域
迫零均衡
digital television
equalizer
single carrier frequency domain
zero forcing equilibrium
