论文部分内容阅读
积分梳状(CIC)滤波器是一种广泛应应用于数字下变频中的高效数字滤波器,文章对其性能和实现方法进行了详细研究。首先对单级CIC滤波器和多级CIC滤波器进行算法分析,以确定各参数对系统性能的影响。然后,建立相应的MATLAB仿真模型并将其中的数据类型转换为二进制补码数制,得到CIC输出数据作为理论值;同时采用VHDL硬件描述语言实现多级CIC滤波器并进行数据流测试,输出数值与MATLAB仿真结果一致,达到了预期的设计要求。
The integral comb (CIC) filter is an efficient digital filter that is widely used in digital downconversion, and its performance and implementation methods are studied in detail. First, the single-stage CIC filter and multi-stage CIC filter algorithm analysis to determine the parameters of the system performance. Then, the corresponding MATLAB simulation model is established and the data type therein is converted into two’s complement number system, and the CIC output data is obtained as the theoretical value; at the same time, the multi-level CIC filter is implemented by the VHDL hardware description language and the data flow is tested, Consistent with the MATLAB simulation results, the expected design requirements were met.