DFT频谱分析系统的FPGA设计与实现  

Design and realization of DFT spectrum analysis system based on FPGA

作　　者：陈至坤[1] 李胜[1] 陈韬[2] 王福斌[3] 孙晓磊[4] 

机构地区：[1]河北理工大学计算机与自动控制学院,河北唐山063009 [2]天津市德力电子仪器有限公司,天津300113 [3]东北大学机械工程与自动化学院,辽宁沈阳110004 [4]天津大学电信学院,天津300072

出　　处：《传感器与微系统》2010年第8期113-116,共4页Transducer and Microsystem Technologies

摘　　要：设计与实现了一种基于FPGA的DFT频谱分析系统。系统对16384点采样数据进行处理,信号频谱分辨率带宽RBW达到30 kHz。相同条件下,与FFT快速频谱算法相比,采用DFT设计占用芯片资源少,降低了设计成本。设计中采用NCO IP Core实时计算正弦和余弦样本,而不需要样本存储器,节省了ROM资源。同时,系统采用流水线工作方式,每场数据处理时间为22 ms,保证了系统的处理速度,实时性较好。本系统已成功应用于实际工程之中。A discrete Fourier transform （DFF） spectrum analysis system based on field programmable gate arrays （FPGA）has been designed and realized. This system deal with 16384 points sampled data,signal spectral RBW reach to 30 KHz. Compared with the FFF, DFF algorithm occupies less chip resources and reduces design cost. In the design, a NCO IP Core is used to calculate the Sin and Cos Samples instead of samples memory. The entire design adopts pipeline architecture to ensure the system＇ s speed and reduce the waste of time, processing time is 22 ms. The system has been successfully used in practical engineering.

关 键 词：现场可编程(逻辑)门阵列 离散傅里叶变换 NCO模块 频谱分析 

分 类 号：TN911.72[电子电信—通信与信息系统]