摘要
针对先验概率相等的2PSK中的信号不含载波分量,无法通过常规锁相法进行载波同步的缺陷,提出了利用新型科斯塔斯(Costas)环对2PSK进行锁频的方案。利用Simulink搭建框图平台对理论进行了验证,并通过System Generator自动代码生成并将代码下载到FPGA芯片上,同时通过硬件在环协同仿真功能将结果实时在Simulink平台显示出来。输出结果表明该方法能较好地达到实现锁频目的,通过比特流数据实时下载到FPGA开发板来进行调试与验证,提高系统性能。
A new Modified Costas loop was proposed to achieve carrier wave synchronization for 2PSK with equal prior probability,as the conventional PLL can＇ t make it due to the absence of the carrier partition.Blocks are built in Simulink,and System Generator is also used to generate code automatically and download it into FPGA.Hardware-In-the-Loop co-simulation is implemented to output the results in the Simulink simultyaneously.Finally,the results prove that the design can lock the carrier frequency well,and the performance can be enhanced through real-time debug and test to download bitstream into FPGA.
出处
《科学技术与工程》
北大核心
2014年第20期237-240,262,共5页
Science Technology and Engineering
基金
陕西省自然科学基础研究项目(2009JM8001-4)
航空科学基金(20095596014)资助
关键词
2PSK
载波同步
科斯塔斯环
硬件在环协同
2PSK
carrier wave synchronization
Costas loop
hardware-in-the-loop co-simulation
