坐标转化在雷达信号处理中应用得非常广泛,随着对实时性要求的不断提高,传统的方法已经不能满足要求。在介绍CORDIC(Coordinate Rotation Digital Computer)算法的基础上提出了一种基于该算法的能够同时进行两路数据的坐标转换的FPGA实...坐标转化在雷达信号处理中应用得非常广泛,随着对实时性要求的不断提高,传统的方法已经不能满足要求。在介绍CORDIC(Coordinate Rotation Digital Computer)算法的基础上提出了一种基于该算法的能够同时进行两路数据的坐标转换的FPGA实现方案。该方法以全流水线结构实现,转换速率快,精度高,能够满足现代雷达信号处理中对实时性的要求,并在实际系统中得到了应用。展开更多
本文提出了一种直接数字频率合成器(DDFS)的设计,以Parallel_CORDIC(COrdinate Rotation Digital Computer)算法模块替代传统的查找表方式,实现了相位与幅度的一一对应,输出相位完全正交的正余弦波形;同时应用旋转角度预测及4:2的进位...本文提出了一种直接数字频率合成器(DDFS)的设计,以Parallel_CORDIC(COrdinate Rotation Digital Computer)算法模块替代传统的查找表方式,实现了相位与幅度的一一对应,输出相位完全正交的正余弦波形;同时应用旋转角度预测及4:2的进位保存加法器(CSA)技术,将速度比传统CORDIC算法提高41.7%,精度提高到10-4.最后以Xilinx的FPGA硬件实现整个设计.展开更多
DBPM system performance is determined by the design and implementation of beam position signal processing algorithm.In order to develop the system,a beam position signal processing algorithm is implemented on FPGA.The...DBPM system performance is determined by the design and implementation of beam position signal processing algorithm.In order to develop the system,a beam position signal processing algorithm is implemented on FPGA.The hardware is a PMC board ICS-1554A-002(GE Corp.)with FPGA chip XC5VSX95T.This paper adopts quadrature frequency mixing to down convert high frequency signal to base.Different from conventional method,the mixing is implemented by CORDIC algorithm.The algorithm theory and implementation details are discussed in this paper.As the board contains no front end gain controller,this paper introduces a published patent-pending technique that has been adopted to realize the function in digital logic.The whole design is implemented with VHDL language. An on-line evaluation has been carried on SSRF(Shanghai Synchrotron Radiation Facility)storage ring.Results indicate that the system turn-by-turn data can measure the real beam movement accurately,and system resolution is 1.1μm.展开更多
文摘坐标转化在雷达信号处理中应用得非常广泛,随着对实时性要求的不断提高,传统的方法已经不能满足要求。在介绍CORDIC(Coordinate Rotation Digital Computer)算法的基础上提出了一种基于该算法的能够同时进行两路数据的坐标转换的FPGA实现方案。该方法以全流水线结构实现,转换速率快,精度高,能够满足现代雷达信号处理中对实时性的要求,并在实际系统中得到了应用。
文摘本文提出了一种直接数字频率合成器(DDFS)的设计,以Parallel_CORDIC(COrdinate Rotation Digital Computer)算法模块替代传统的查找表方式,实现了相位与幅度的一一对应,输出相位完全正交的正余弦波形;同时应用旋转角度预测及4:2的进位保存加法器(CSA)技术,将速度比传统CORDIC算法提高41.7%,精度提高到10-4.最后以Xilinx的FPGA硬件实现整个设计.
基金Supported by Shanghai Synchrotron Radiation Facility project
文摘DBPM system performance is determined by the design and implementation of beam position signal processing algorithm.In order to develop the system,a beam position signal processing algorithm is implemented on FPGA.The hardware is a PMC board ICS-1554A-002(GE Corp.)with FPGA chip XC5VSX95T.This paper adopts quadrature frequency mixing to down convert high frequency signal to base.Different from conventional method,the mixing is implemented by CORDIC algorithm.The algorithm theory and implementation details are discussed in this paper.As the board contains no front end gain controller,this paper introduces a published patent-pending technique that has been adopted to realize the function in digital logic.The whole design is implemented with VHDL language. An on-line evaluation has been carried on SSRF(Shanghai Synchrotron Radiation Facility)storage ring.Results indicate that the system turn-by-turn data can measure the real beam movement accurately,and system resolution is 1.1μm.
