CAJ | 학술논문

给出了一种自适应滤波器的设计和FPGA的实现方法.简要分析了最小均方误差(LMS)、归一化最小均方误差(NLMS)和延迟最小均方误差(DLMS)自适应滤波器的工作原理,指出了3种滤波器的区别和联系.详细介绍使用Xilinx公司的AccelDSP高层次设计工具设计自适应滤波器的流程与方法,说明了可综合Matlab语言的结构特点,提高硬件使用效率的途径等设计细节,得到了设计代码和仿真结果.设计经过硬件时序仿真验证,可以在FPGA中直接实现.仿真结果说明,NLMS滤波器对于音频信号有很好的收敛特性,DLMS滤波器可以达到很高的工作频率设计.设计方法对于其它数字信号处理系统的设计和实现具有参考价值.设计过程表明AccelDSP工具可以显著地提升数字信号处理系统的设计效率.
급출료일충자괄응려파기적설계화FPGA적실현방법.간요분석료최소균방오차(LMS)、귀일화최소균방오차(NLMS)화연지최소균방오차(DLMS)자괄응려파기적공작원리,지출료3충려파기적구별화련계.상세개소사용Xilinx공사적AccelDSP고층차설계공구설계자괄응려파기적류정여방법,설명료가종합Matlab어언적결구특점,제고경건사용효솔적도경등설계세절,득도료설계대마화방진결과.설계경과경건시서방진험증,가이재FPGA중직접실현.방진결과설명,NLMS려파기대우음빈신호유흔호적수렴특성,DLMS려파기가이체도흔고적공작빈솔설계.설계방법대우기타수자신호처리계통적설계화실현구유삼고개치.설계과정표명AccelDSP공구가이현저지제승수자신호처리계통적설계효솔.
A design approach and FPGA implementation method of adaptive filters is presented in this paper. Working theory and differences of LMS, NLMS and DLMS adaptive filters is shortly analyzed. Using Xilinx's AccelDSP tool, the details of design flow, synthesizable MATLAB constructs and improving hardware using efficiency method, with part of the code and simulation results, is presented as well. The design is verified by timing simulation, and can be implemented on FPGA directly. It is shown by simulation results that NLMS filters have a better convergence character, while DLMS filters have a higher working frequency. The design approach can be a good reference to other digital signal processing systems. And the design process demonstrates that AccelDSP can remarkably improve the design efficiency of DSP systems.