摘要： 为解决传统Costas环在多路载波提取中占用资源量大以及在数字下变频中消耗现场可编程门阵列资源过多的问题，提出一种采用逻辑控制模块代替直接数字合成器模块的方法，设计并实现数字Costas环路。该方法适用于阵列雷达信号等多路载波信号处理，能够实现环路载波的快速提取，节约25%的硬件资源。

关键词: Costas环, 鉴相器, 载波同步, 锁相环, 滤波器

Abstract: A new kind of Costas loop is designed with logistic modules instead of the primary Direct Digital Synthesizer(DDS) module in order to save logical resource in multi-carriers extraction and Direct Digital Control(DDC). The result of design shows that the proposed way is satisfactory for practical application and logical resource is saved by 25%. This new proposal is valuable to extraction of multi-carriers, especially in radar array signal processing.

Key words: Costas loop, phase detector, carrier synchronization, phase locked loop, filter

中图分类号: 

• TP393