Design Of Digital Filter Based On DSP

Nowadays we are in the digital time, the technology of digital signal process are got extensive attention by people. Accompany with the development of technology of computer and microelectronics, the theory and arithmetic of digital signal process development quickly, Digital filters are extemsively used in audio and video process, digital communications, frequency analyse, autocontrol and so on. Digital filter is one of the most important part of digital signal process, almost appeared in all digital signal process system. Digital filter is a discrete LIT system can accomplish the signal filter using finite precision arithmetic, with a group of digital signal input (which sampled and measure with analog signals) and another group of changed digital signal output. Digital filter is one of the important contents of digital signal process. Relative to analog filter, the digital filter without excursion, be able to process low frequency signal, the characteristic of frequency response close to ideal value, with high precision, and easy to integrated. These advantages decide the application of digital filter become more and more extensively. While the developing of DSP (ditigital signal processor) and FPGA, provide more choice for digital filter.The mostly important task of this paper is researching the basic theories of digital filter, base on the TMS320VC5402 of TI company design digital filter system with high stability and low power consume, accomplish the hardware and software debug, main task as following:(1) Reach the basic theory of digital filter and the method of realize of digital filter, grasp the principle and characteristic of each digital filter.(2) Reach and analyse how to use the simulate software of MATLAB to disign the required digital filter. Use several function design some universal digital filter, get the coefficient of digital filter, prepare the prophase task of design a digital filter base on DSP.(3) Reach the structure and characteristic of TMS320VC5402, according to the particular characteristic of this digital signal processor, disign an rationalizationsystem structure of digital filter. Comprehensive and integrated design the each part of circuit with different function, process the connection of ADC and DAC with Digital Signal Processor. Offer a stability hardware system to realize digital filter.(4) According to the basic structure and characteristic of spectrum 5000 digital signal processor of TI, make the best of of the resource on chip, combined with simulate software MATLAB, realized a high performance and high stability digital filter.