摘要随着时代的发展，我们对雷达、航天航空、信息对抗、图像处理等领域的信号检测提出了更高的要求和标准。信号检测主要包括对信号进行滤波，数据采集，处理以及最终显示等操作。本设计主要实现对频率1KHz-30KHz的正弦波周期信号在线检测，具体通过基于2808DSP芯片的信号最小检测系统，进行1路AD,1。6us采样间隔，600KHz采样率进行采样。当采集完一个完整周期的信号后进行数据处理，对回波信号进行FFT变换，从而得到被测信号频率信息。根据设计要求，本系统由DSP芯片，时钟源，复位电路，电源电路和JTAG接口等组成。具体本论文设计基于德州仪器（TI）公司的TMS320F2808芯片，由提供时钟信号的晶振电路，为系统提供电源和复位信号的电源电路及复位电路，为消除噪声干扰的滤波电路，信号频率的数码显示电路，信号幅度的放大电路，系统的保护电路等电路构成。系统的硬件部分用Proteus进行电路原理图设计，软件部分采用CCS进行调试开发。经测试，本系统设计可行，该电路能够实现对频率1KHz-30KHz的正弦波周期信号进行检测，实验达到预期效果。78815

毕业论文关键词  DSP  最小系统  数据采集  信号检测  A/D采样  FFT

毕业设计说明书（论文）外文摘要

Title  The minimum detectable signal system based on high-speed DSP2808 chip design

Abstract With the development of The Times, we put forward higher requirements and standards to the radar, aerospace, information confrontation, the signal detection in the field of image processing。At present,the signal detection we defined by mainly includes the filtering,the signals  analyzed with data acquisition, processing ，the final display,and so on。This design  mainly use 1 AD road, 1。6us sampling interval,600KHz sampling rate for the frequency 1KHz-30KHz sinusoidal periodic signal,through the minimum signal detection system based on DSP chip 2808 to sampling。When the acquisition after a complete cycle of the signal data processing,the echo signal FFT transform,and the target frequency information is obtained。In accordance with the requirements of system design,this system consists of DSP chip, the clock source,reset circuit,power circuit and JTAG interface,etc。This paper is designed based on TMS320F2808 chip of Texas instruments (TI) company,consists of providing the clock signal of the vibration circuit for the system to provide power supply and reset signal power supply circuit and reset circuit,to eliminate the noise LC filter circuit, display signal frequency digital tube display circuit, enlarge the amplitude of the signal amplification circuit, protection of protection circuit for circuit system。The hardware part of the system uses the circuit principle diagram to design Proteus,software part uses CCS to debug and test。After testing,the designation of system is feasible,the circuit can realize the function that frequency is 1KHz-30Khz of sine wave signal detection。This experiment achieved the expected results。

Keywords   DSP  The minimum system   Data collection   Signal detection A/D sampling    FFT             

目  次

1     绪论。1

1。1   研究背景及意义。。 1

1。2   课题的研究现状3

1。3   系统的设计难点。。 3

1。4   本文的组织结构4

2     信号最小检测系统。5

2。1   信号最小检测系统指标5

2。2   典型最小检测系统设计5

2。2。1 典型系统硬件设计。5

2。2。2 典型系统软件设计。6