摘要
针对SC-FDE系统中,基于Zadoff-Chu序列频偏估测方法存在的相位模糊问题,提出一种基于混合函数鉴相的改进型Costas环路方案。经MATLAB软件仿真验证,该方案能显著改善频偏估测模糊问题。经FPGA系统验证,该方案中的改进型Costas环路相较传统Costas环路拥有入锁时间短的优点。该方案结构简单易于实现,具有良好的工程应用价值。
A modified Costas loop based on phase discrimination, uunzmg mlxeu tuHcuuu, ,~ proposed in this paper to resolve the fuzzy problem of frequency offset estimation in Zadoff - Chu sequence. The simulations show the fuzzy problem of frequency offset estimation is improved significantly and the lock time is greatly shortened comparing to the traditional one. In a word, this new modified Costas loop has great value in engineering application.
出处
《微处理机》
2015年第5期14-17,共4页
Microprocessors
