摘要
在研究LMS自适应滤波理论的基础上,建立LMS自适应滤波器的数学模型,利用MATLAB中DSPBuilder库设计了一种LM S自适应音频滤波器,并用FPGA实现。实验结果表明选择合适的步长因子有助于改善滤波器性能,可实现对音频信号的自适应滤波。
Based on the study of LMS adaptive filter theory,the paper built a mathematical model of the LMS adaptive filter,designed a LMS adaptive audio filter with the DSP-Builder library in MATLAB/Simulink, and realized with the FPGA. Experimental results show that the selection of appropriate step factor does help to improve the performance of the filter,which can realize the adaptive filter for audio signal.
出处
《江苏理工学院学报》
2015年第2期42-46,共5页
Journal of Jiangsu University of Technology
基金
江苏省高校大学生创新训练计划项目"基于FPGA的音频处理系统设计"(201411463047X)
江苏理工学院教改项目"FPGA技术实践教学改革"(JG13009)
关键词
自适应滤波器
最小均方误差
现场可编程门阵列
adaptive filter
least mean square ( LMS )
field programmable gate array (FPGA)