CAJ | 학술논문

概述了有限冲激响应(FIR)数字滤波器的实现方法,并分析了各种方法的优缺点,设计了一个可调参数的FIR数字滤波系统.此系统由PC机根据各种滤波器指标计算出滤波参数,并对现场可编程门阵列(FPGA)芯片内部的FIR多阶滤波器进行参数配置.配置后的FPGA芯片完成具体的滤波运算,滤波后的数据通过USB2.0总线传输至PC机进行显示、分析和储存等进一步处理.在系统中采用有限状态机对FPGA参数配置模式和滤波模式进行切换,保证了系统的有序运行.通过验证实验和应用实例证明.此系统参数配置方便,滤波效果良好,迭到了设计的目的.
개술료유한충격향응(FIR)수자려파기적실현방법,병분석료각충방법적우결점,설계료일개가조삼수적FIR수자려파계통.차계통유PC궤근거각충려파기지표계산출려파삼수,병대현장가편정문진렬(FPGA)심편내부적FIR다계려파기진행삼수배치.배치후적FPGA심편완성구체적려파운산,려파후적수거통과USB2.0총선전수지PC궤진행현시、분석화저존등진일보처리.재계통중채용유한상태궤대FPGA삼수배치모식화려파모식진행절환,보증료계통적유서운행.통과험증실험화응용실예증명.차계통삼수배치방편,려파효과량호,질도료설계적목적.
Various design methods of FIR filter are summarized and their characteristics are analyzed.Then,a reconfigurablc FIR filter system is presented.According to the filter specialties,the filter coefficients are calculated by PC computer.And the configured coefficients of the multistage FIR filter are downloaded to the chip.The filter computing is completed by the FPGA.The filter data are transmitted to the computer through the USB2.0 interface for further processing,such as displaying,analyzing and storing.The state conversion between the coefficient configuring mode and the filter mode is finished by finite state machine,thus ensuring the system to work orderly.The verifying experiments and the application examples show that the coefficient configuring of the system is easy and the filter result is effective.