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The data acquisition system has a wide range of applications , the radar system , mainly used in the collection and storage of radar echoes . Large array imaging radar , phased array radar , radar systems distributed due to the presence of multiple transmit receive channel , the received signal the need for coherent processing , signal bandwidth , high pulse repetition frequency , and therefore need a data acquisition system has more channel synchronous data acquisition and high-speed acquisition , transmission and storage capacity . In this paper, a radar system requirements , design complete multi-channel synchronous data acquisition system , and synchronization , transmission and storage system performance test , the technical specifications to meet system requirements . First , this paper studies the design and implementation of the multi-channel high-speed synchronous data acquisition system ; research for the system bus structure of the high-speed data transmission and storage , the technical characteristics of the disk array and method ; study evaluation of multi-channel data acquisition system the channel delay mathematical methods , given the discrete Fourier transform , the sine wave fitting and simulation results of the Kalman filter three main algorithm analyzes the performance of the three algorithms and applications . Secondly this paper, the system design requirements , the completion of a multi-channel synchronous data acquisition system components design selection . Build a multi-channel synchronous data acquisition hardware constituted by a collection controller and data acquisition system , 96 channels per channel maximum 50MSPs, sampling resolution 10bit, channel-to-channel synchronization performance is less than 1ns, data transmission and the memory speed is greater than 139.2MBPs data acquisition system . Then studied in this paper the principle of virtual instrument based on LabVIEW development software , The multithreaded design technical design to complete multi-channel data acquisition system software , the acquisition and control , data transmission and storage, data playback functions . Finally, we carried out DFT algorithm - based system synchronization performance test , the system of data transmission and storage performance testing to meet the system requirements of the technical indicators .
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