摘要
提出了一种滤波器组架构,用于对音频信号进行数字化处理。此架构包括:CIC滤波器、第一级半带滤波器、第二级半带滤波器、补偿滤波器、高通滤波器。通过对滤波器组进行建模仿真,分析了其主要参数对性能的影响,对电路结构进行了优化,使该级联结构能够有效降低运算量,滤除基带信号带外噪声,并提高整个链路的信噪比。
An architecture of multi-stage filter group for processing digital audio signals was presented,which was comprised of CIC filter,the first half-band filter,the second half-band filter,the droop-correction filter and high-pass filter.By modeling and simulation,effects of parameters on the performance were analyzed,and structure was optimized.It has been demonstrated that the cascaded structure could effectively reduce the amount of computation,filter out band noise,and improve SNR of the entire link.
出处
《微电子学》
CAS
CSCD
北大核心
2014年第2期167-170,共4页
Microelectronics
基金
国家自然科学基金资助项目(61204040
60976028)
北京市自然科学基金资助项目(4123092)
教育部博士点基金资助项目(20121103120018)
北京市教育委员会科技计划面上项目资助课题(JC002999201301)
