Research On Real-time Data Acquisition And Block Data Transmission Technology For Signal Simulation

With the rapid development of digital technology,the demand for high-precision,high-resolution AD sampling data in various fields is becoming more and more common.The requirements for the real-time performance and data transmission speed of the system are also getting higher and higher,Accurate acquisition of real-time block data transmission technology has a high engineering value.This paper designed and completed a high-speed signal acquisition and processing board,and completed on the hardware board FPGA-based real-time data acquisition and block data transmission module.In the data acquisition module,IDELAY and delay calibration algorithms are used to realize the synchronization of 8 AD data.The down conversion module uses the multi-stage extraction low-pass filter to obtain the frequency-converted signals of various sampling rates,which has the advantages of accurate data and high flexibility.This article also completed a number of important functional modules within the FPGA:block transfer module uses a custom RocketIO protocol,using the K code as a data mark,to improve the efficiency and robustness of data transmission;DDR memory module used Block data read and write,to achieve instantaneous data read and write,high efficiency;calculation module using a multi-bit pipelined multi-bit matrix multiplication,to achieve a large matrix complex multiplication fast calculation;synchronous send module to achieve a synchronous RocketIO-based clock distribution,To achieve high-speed three FPGA data sent simultaneously.In this paper,an experimental platform based on high-speed signal acquisition and processing board is set up.The experimental results show that the data acquisition module realizes the simultaneous reception and storage of multiple high-speed AD data and the baseband signal conversion with various sampling rates.Real-time block data transfer speeds up to 180Gb/s and millisecond latency meet the demands of today's high-speed,real-time systems.