摘要
Costas环是一种闭环自动调整系统,常用于抑制载波的相位调制系统中提取参考载波信号。文中在FPGA(现场可编程门阵列)平台上实现了全数字化的Costas环载波恢复电路,介绍了Costas环的基本原理,详细阐述了环路各部件的参数及电路设计,给出了实现后的RTL(寄存器传输逻辑)原理图及仿真测试数据,仿真结果表明,该Costas环路具有十分优良的性能。
Costas loop is a closed self-adjusting system, usually used to extract reference carrier in suppressed carrier phase modulated systems. An all-digital Costas loop carrier recovery circuit is implemented on FPGA （Field Programmable Gate Array）. The basic principle is introduced, and parameters and design of each part of the loop are described in detail. Finally, the RTL （ Resistor Transistor Logic） scheme and test da- ta are provided. Simulation results show that high performance can be achieved using this kind of all-digital Costas loop.
出处
《电子工程师》
2006年第1期18-20,24,共4页
Electronic Engineer
