利用CORDIC算法提取脉内特征在FPGA上的实现  

Implementation of FPGA-based CORDIC algorithm used to extract in-pulse characteristics

作　　者：王炜珽[1,2] 张文旭[1] 陶东香[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]海军航空工程学院青岛校区,山东青岛266041

出　　处：《现代电子技术》2016年第9期1-5,11,共6页Modern Electronics Technique

基　　金：国家自然科学基金(61301200);中央高校基本科研业务费专项资金项目(HEUCF150808)

摘　　要：介绍了坐标旋转数字计算(CORDIC)算法的原理,给出了利用CORDIC算法提取信号脉内特征的迭代公式,在此基础上实现了用该算法的流水型迭代结构提取瞬时幅度、相位和频率的FPGA电路,解决了电路中的时钟与寄存器配置、数据的补码格式和相位累加等问题。通过在硬件芯片上的下载验证,表明电路结构合理、测试有效,满足设计要求。The principle of the coordinated rotation digital computer（CORDIC）algorithm is introduced. The iterative formula of the signal in-pulse characteristics extracted by CORDIC algorithm is proposed. On this basis,the FPGA circuit of extracting the instantaneous amplitude,phase and frequency by pipeline iterative structure of the algorithm was realized. The problems of clock and register configuration,data′s complementary code format and phase accumulation in the circuit were solved. The downloading verification on hardware chip shows that the circuit structure is reasonable,and test is effective. The circuit can satisfy the design requirement.

关 键 词：坐标旋转数字计算 脉内特征 FPGA设计 补码 

分 类 号：TN79-34[电子电信—电路与系统]