基于Costas环的载波提取电路设计与仿真

Design and simulation of circuit for carrier extraction based on Costas loop

Costas环是一种闭环自适应系统,常用于提取相干载波。介绍了数字Costas环的基本原理,并根据DSP开发工具DSP Builder的优点,采用VHDL文本与Simulink模型图相结合的方法对Costas环载波恢复电路进行了FPGA设计,仿真结果验证了设计的正确性及可行性。

Costas loop is a kind of closed-loop adaptive system which is usually used to extract coherent carrier. The paper introduces the basic principles of Costas loop in brief and aiming at the advantages of DSP development tool named as DSP Builder, designs restoring circuit for Costas loop based on FPGA by utilizing the combination method of VHDL test and Simu- link module. Finally, The correctness and feasibility of this design is verified by the simulation result.