The Multi-channel Acquisition And Real-time Processing System Design Based On FPGA + DSP

According to the project on flying objects with high speed flight attitude measurementcharacteristics: flight signal requires synchronization multi channel parallel acquisition, dataacquisition time is long data acquisition time, environmental interference, high real-timerequirement, project design to meet the research needs of the multi channel data acquisitionand real time processing system. The specific research and design work are as follows:First of all, for flying objects with high speed flight parameters need multi channel realtime acquisition and processing requirements, the FPGA+DSP based data acquisition and realtime processing system is designed, in which the FPGA will provide the core control chip forthe system while the DSP will focus on real time data processing. The system uses five12 bitparallel sampling A/D synchronization acquisition of flying object on the sensor array signalsand collects data to achieve the real-time filtering processing.Secondly, a larger amount of data is needed in the high-speed flying objects flyingattitude parameter measurement process, due to the demand for the object for a long timemulti channel measurement. However the DSP chip interior storage space is insufficient, a512 M NAND FLASH chip is expanded in the system to ensure the system can be used forlong time and avoid losing data in the large capacity data acquisition process.Finally, according to the real-time signal filter characteristics, considering the signalsampling frequency wide relative bandwidth, narrow band FIR digital filters are designedusing multiple rate techniques to avoid the ordinary FIR filter order. So more hardwareresources are needed to solve time problem in DSP, and ensure the system real-time dataprocessing. At the same time, the use of MATLAB and CCS integrated developmentenvironment for the design of narrow band FIR filter to carry out the simulation test，thevalidation of the design of the filtering effect and time effect. The simulation tests are carriedout to design the narrow band FIR filter using MATLAB and CCS integrated development environment. The validation of the design of the filtering effect and time effect are provedwell in the simulation test.