测控技术2025，Vol.44Issue(12)：30-36,60,8.DOI:10.19708/j.ckjs.2025.10.255
基于改进CIC结构的PDM转PCM设计
PDM-to-PCM Conversion Design Based on Improved CIC Architecture
摘要
Abstract
To improve the performance of converting pulse density modulation(PDM)signals to pulse code modulation(PCM)signals,a conversion scheme based on an enhanced cascaded integrator comb(CIC)filter is proposed.By optimizing the conventional CIC structure,properly configuring the orders of the two-stage filters,and introducing a sharpening factor,passband flatness is effectively improved,enabling high-fidelity conversion of low-frequency signals.Simulation results demonstrate that the proposed method achieves high-fidelity PDM-to-PCM conversion while effectively suppressing high-frequency noise and aliasing components.The algorithm program design is completed on FPGA,and the converted data is subjected to spectrum analysis.The experi-mental results verified the effectiveness of the proposed scheme in engineering applications.关键词
PDM转PCM/线性锐化/改进积分梳状滤波器/FPGAKey words
PDM to PCM/linear sharpening/improved CIC filter/FPGA分类
信息技术与安全科学引用本文复制引用
赵慎,张锐,李俊毅,汤灏,唐悦轩..基于改进CIC结构的PDM转PCM设计[J].测控技术,2025,44(12):30-36,60,8.基金项目
湖南省自然科学基金(2025JJ80255,2024JJ9188) （2025JJ80255,2024JJ9188）
湖南省教育厅科学研究重点研究项目(23A0464,21B0577) （23A0464,21B0577）
