Design And Implement Of Signal Acquisition And Processing System Based On DSP

With the fast development of the communication science,the Digital Signal Processer has become a key technical.The appearance of DSP chips makes the arithmetic of Digital Signal Processing come true.The structure of the DSP chips is Harvard.DSP are getting more and more attentions in the information field,due to its powerful signal processing ability,which is becoming a hotspot in communication and other correlative signal processing fields.This article discusses a kind of Data Acquisition and Processing System design, which is based on Digital Signal Processor.In the paper,we uses the DSP chips TMS320LF2407A models as a core processors,to achieve:the control of AD sampling,the sampling data processing,display processing functions.The design of the whole system was discussed in the following aspects:(1) Analysis the feasibility of the whole system,including the selection of the processor and the board's,the system performance parameters and other settings.(2) Discusses the theory of the system,including the principle of spectrum analysis,error analysis,implement 2048 points FFT on DSP(save time and space).(3) Design the hardware of the system,including front-end signal conditioning circuit and anti-aliasing filter circuit design,the allocations of the board's resource,as well as the setting of LCD interface and the Keyboards.(4) Implement the program of the system,including the processes of the whole system,the design of whole program process,each models program implement,the method of configuring.cmd document,the program download in FLASH,the way of setting A/D sampling rate and frequency resolution.(5) Analyze the correctness of the system's algorithm and the accuracy of the system's performance,from the perspective of theory,the results of the experimental analysis,the actual data analysis of Matlab simulation.Finally,give the ways to improve the system.This system has achieved the particular function of Data Acquisition and Processing System.The design method is simple and feasible,which can be used as low-cost data acquisition module,or a little improvement as a simple digital oscilloscope or spectrum analyzer equipment.