基于FPGA的WSN数字基带成形滤波器设计

Digital Baseband Shaping Filter Design of WSN Based on FPGA

基于EP2C35芯片设计了无线传感网络(WSN)数字基带成形滤波器,主要通过根升余弦成形滤波器的参数分析、抽头系数提取、系统结构设计与改进、系统功能与时序仿真和FPGA综合调试等过程实现。研究结果表明,该成形滤波器滚降系数为0.3时,通带内衰减小于0.5 d B,阻带衰减40 d B/Dec,时钟频率215 MHz,消耗288个逻辑单元,其资源消耗低,运算速度快,成本低廉,具有一定应用价值。

A novel shaping filter for digital baseband of wireless sensor networks （WSN） is designed and implemented based on the EP2C35 FPGA. It is implemented via analyzing the root ascending cosine shaping filter parameter, extracting tap coefficients, improving system structure, simulating functional and timing, synthesizing and debugging in FPGA. The result shows that the pass band attenuation is 0.5 dB and the stop band attenuation is 40 dB/Dec when the roll off factor of root raised cosine filter is 0.3. The filter consumes 288 logic units and the clock work at 215 MHz. The lower cost, lower consumption of resources and faster computational speed indicates that it has an important value in future application.