Research on PCI data acquisition and processing of parallel FIR filter

With the development of electronic information technology, the frequency and bandwidth of signals are increasing, and the running frequency of various signal processors is also increasing. The design of using digital signal processing chip as the core of the system is not flexible enough, and many additional external system resources are needed. In order to deal with data with a high sampling rate and low complexity, a PCI data acquisition, and processing system based on parallel FIR filters is studied in this paper. The system takes FPGA as the main control core and uses the window function method to design the 32 order parallel linear phase FIR filter in the FPGA chip. The 4-channel ADS7945 is used as the analog data acquisition chip, and the data is collected and sent to the FPGA for processing. Finally, with the PCI9052 interface chip as the medium, the FPGA transmits the data to the PC through the PCI bus. The experimental results show that, especially in the case of high sampling frequency, the data acquisition and processing system can realize high-speed and high-precision data acquisition and filtering, greatly reduce hardware resources and save development costs.