基于人体域网的FIR数字滤波器的FPGA实现

FPGA Implementation of FIR Digital Filter Based on Body Area Network

由于IEEE802.15.6协议未对物理层中滤波器作任何说明,为此提出了一套基于分布式结构的高阶FIR数字滤波器的实现方案。该方案使用MATLAB中的FDA Tool工具设计滤波器系数,采用IP核对滤波器系数进行定点化,并重点介绍了滤波器的FPGA实现的上采样模块、查找表模块和循环累加模块等。最后在Model Sim仿真环境下验证各个模块的逻辑功能,并下载各个模块的Verilog硬件描述代码到FPGA开发板上进行联合板级验证。

Because no description for the filters in the physical layer was raised in protocol IEEE802.15.6, in this paper, we proposed a scheme of high-order FIR digital filter based on the distributed structure, using the FDA tool of MATLAB to design the filter coefficient, using the IP to fix the point of the filter coefficients. This paper also focused on the up-sample module, lookup-table module and cyclic accumulate module of the filter based on FPGA implementation. Finally, the function of each module was verified in the Model Sim simulation environment, and the Verilog hardware description code of each module could be downloaded to the FPGA development board for joint board level verification.