基于FPGA的微弱信号检测与实现技术  

Weak signal monitoring algorithm and realization technology on the FPGA

作　　者：高振斌[1] 田晓旭[1] 

机构地区：[1]河北工业大学电子信息工程学院,天津300401

出　　处：《重庆邮电大学学报（自然科学版）》2016年第3期297-302,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(61139001)~~

摘　　要：研究了杜芬混沌振子(Duffing chaos oscillator)微弱信号检测算法及其现场可编程门阵列(field programmable gate arrays,FPGA)实现技术。根据杜芬系统在混沌和大周期2种状态下相图的明显区别,运用基于相图分割的信号检测方法,在FPGA上实现了杜芬混沌算法与系统状态判别方法的结合。根据并行运算与流水线原理,对杜芬方程的结构进行调整。采用递推数列的方法计算正弦值,以便节约存储空间。使用VHDL硬件语言设计了杜芬阵子系统中核心的四阶龙格库塔(fourth order Runge Kutta algorithm,RK4)模块和状态检测模块,在vivado集成开发环境下仿真验证了设计的正确性。通过改变策动力的频率,系统可以检测各种频率的微弱正弦信号。经判断,该系统可实现对与系统信号同频率信号的检测。The algorithm of detecting weak signal based on chaotic oscillator theory is researched and programmable gate arrays（ FPGA）. Considering the obvious differences of phase diagram between two conditions of chaosand large cycle, the method based on the phase diagram sgmentation is proposed and implemented in FPGA. Duffing cha-otic algorithm and system state identification are combined in FPGA. According to the principle of parallel and pipeline, the structure of duffing equation is adjusted. Furthermore, the recursive sequence is applied to calculate sine value for more efficient hardware resource usage. The VHDL hardware description language i i employed to design the RK4 modspection module which is the core of Duffing system, and verify the correctness of the design on ment environment. The system can detect weak sinusoidal signals with various frequencies by changing the frequency of thedriving force. Experiments show that the system can detect the signal which has the sam

关 键 词：微弱信号检测 现场可编程门阵列(FPGA) 杜芬混沌阵子 递推数列 

分 类 号：TN911.12[电子电信—通信与信息系统]