摘要
以采样定理和采样恢复为理论依据,分析了利用内插/重采样技术从基带采样信号中恢复数字信号最佳判决点的可行性。给出了采用该技术实现全数字码元同步的方法,并对其关键组成模块:内插/重采样器、码元误差检测、环路滤波器以及DDS等给出了详尽的设计说明和参数计算方法。该方案对软件和硬件实现有着普遍的适用性,其正确性和有效性经过了仿真验证。
In this paper, we analyze the feasibility of recovering digital signal optimized decision point from baseband sample signals based on Nyquist sample theorem and signal recovery, present the method of digitized symbol timing recovery using interpolation and resampler and describe in detail the design and parameter calculation methods of its key composition modules such as interpolation and resampler, timing error detector, loop filter and DDS. The method is suitable for software and hardware implementation, and its correctness and validity are verified through simulation.
出处
《无线电工程》
2008年第3期21-24,共4页
Radio Engineering
关键词
内插/重采样器
码元同步
采样定理
interpolation and resampler
symbol timing
Nyquist sample theorem
