电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2014年
15期
23-26
,共4页
刘鑫%王胜奎%李广良%刘彤
劉鑫%王勝奎%李廣良%劉彤
류흠%왕성규%리엄량%류동
IIR数字滤波器%FPGA%MATLAB仿真%量化字长
IIR數字濾波器%FPGA%MATLAB倣真%量化字長
IIR수자려파기%FPGA%MATLAB방진%양화자장
IIR digital filter%FPGA%MATLAB simulation%quantized word length effect
为了实现音频基带数字信号的提取与杂波信号剔除，提供了一个从MATLAB仿真到FPGA实现的IIR数字滤波器的解决方案，同时对比了由于量化字长的不同对数字滤波器产生的影响。通过MATLAB的FDA Tool产生所需的滤波器构型和SOS系数，由MATLAB量化滤波器系数，将量化后的滤波器系数装载至FPGA板级实现。在Chip-scope中观察实际滤波输出波形，比较滤波器系数量化对滤波效果造成的影响，实验证明，采用级联型结构和较长的量化字长，滤波器输出较为稳定。
為瞭實現音頻基帶數字信號的提取與雜波信號剔除，提供瞭一箇從MATLAB倣真到FPGA實現的IIR數字濾波器的解決方案，同時對比瞭由于量化字長的不同對數字濾波器產生的影響。通過MATLAB的FDA Tool產生所需的濾波器構型和SOS繫數，由MATLAB量化濾波器繫數，將量化後的濾波器繫數裝載至FPGA闆級實現。在Chip-scope中觀察實際濾波輸齣波形，比較濾波器繫數量化對濾波效果造成的影響，實驗證明，採用級聯型結構和較長的量化字長，濾波器輸齣較為穩定。
위료실현음빈기대수자신호적제취여잡파신호척제，제공료일개종MATLAB방진도FPGA실현적IIR수자려파기적해결방안，동시대비료유우양화자장적불동대수자려파기산생적영향。통과MATLAB적FDA Tool산생소수적려파기구형화SOS계수，유MATLAB양화려파기계수，장양화후적려파기계수장재지FPGA판급실현。재Chip-scope중관찰실제려파수출파형，비교려파기계수양화대려파효과조성적영향，실험증명，채용급련형결구화교장적양화자장，려파기수출교위은정。
In order to realize the extraction of the audio baseband digital signal and the clutter signal elimination, a solution of digital filter from MATLAB simulation to FPGA implementation is provided, while the effects of different quantized word length on the digital filter are compared in this paper. The desired filter configuration and SOS coefficients are produced via the MATLAB FDA Tool, and the digital filter coefficients are quantified by MATLAB computing. Quantized filter coefficients are loaded to the FPGA for board-level implementation. By observing the actual filter output waveform in Chipscope, the effects of the filter coefficient quantization on the filtering effect are compared. The experiment proved that the cascade structure and longer quantitative word length, bring relatively stable filter output.
