摘要
针对传统数字Costas环设计复杂的缺点,提出了一种利用FPGA软核降低数字Costas环设计复杂度的方法。首先对传统Costas环的结构研究和分析,在此基础上提出了改进的Costas环,并使用MATLAB验证了方案的可行性。然后在XILINX ISE中对改进的数字Costas环进行设计,其中数控振荡器和相位检测器以CORDIC IP核为核心进行构建,有效降低了设计的复杂度。最后使用MODESLIM仿真,对比传统Costas环和改进Costas环的同步性能。仿真结果表明,改进Costas环有更好的同步性能,对Costas环的研究和应用具有一定实际意义。
In view of the shortcomings of traditional digital Costas loop design, a method to reduce the complexity of digital Costas loop design by using FPGA soft core is proposed. Firstly, the structure of the traditional Costas ring was studied and analyzed. On this basis, the improved Costas ring was proposed, and the feasibility of the scheme was verified by using MATLAB. Then,the improved digital Costas loop is designed in XILINX ISE,where the NCO and phase detector are built with CORDIC IP core, which effectively reduces the complexity of the design. Finally, the MODESLIM simulation is used to compare the synchronization performance of the traditional Costas loop and the improved Costas loop. The simulation results show that the improved Costas loop has better synchronization performance, and it has practical implications for the research and applications of Costas loop.
作者
张宏达
王黎明
赵英亮
杨阳
张岩
Zhang Hongda;Wang Liming;Zhao Yingliang;Yang Yang;Zhang Yan(Institute of Signal Capture & Processing,North University of China,Taiyuan 030051,China)
出处
《国外电子测量技术》
2018年第12期71-75,共5页
Foreign Electronic Measurement Technology
