新型Costas环在2PSK中的研究与硬件实现  

Analysis and Implementation of Modified Costas Loop for 2PSK

作　　者：梁源[1] 王兴华[1] 向新[1] 

机构地区：[1]空军工程大学航空航天工程学院,西安710038

出　　处：《科学技术与工程》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

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.

关 键 词：2PSK 载波同步 科斯塔斯环 硬件在环协同 

分 类 号：TN911.7[电子电信—通信与信息系统]