摘要
在采样时钟固定且采样速率受限的情况下,全数字接收机的采样时刻不一定在信号的最佳判决点,此时,码元受码间干扰影响较为严重。传统的符号定时恢复方法已不能满足要求,文中提出了一种基于非同步采样,用内插技术实现的符号同步方法,完成了符号同步。文中介绍了几种插值滤波器,并对它们的性能进行了比较。
The sampling time of the all - digital receiver might miss the best decision point when the sam- piing clock is fixed and the rate of sampling is limited, under which circumstance, symbol decision is affected badly by ISI. The traditional symbols synchronization method does not work well. This paper presents a new symbols synchronization technique based on the nonsynchronization sampling with the help of the interpolator. It also introduces some interpolation filters and compares their performance.
出处
《电子科技》
2008年第7期4-7,共4页
Electronic Science and Technology
关键词
全数字接收机
码元同步
内插滤波器
all-digital receivers
symbols synchronization
interpolation filter
