Design Of High Speed Data Sampling Storage And Playback System

With the development of radar technology, the capability of radar is becoming more and more complex. To detect and restore radar scenario, we have to do data sampling storage and playback. Therefore, the studies on how to achieve high-speed data sample storage and playback are getting more and more attention,In this paper, we propose a high-speed data sampling storage and playback system based on FPGA. The system first converts analog single-ended signal into differential signal, which can be received by the ADC. Then, the ADC converts the analog signal into digital signal with a high speed. The output data of the ADC are then stored in Flash chip array. When the data need to bereplayed, the system reads the data from the Flash chip array and sends them to the DAC. The DAC then applies high-speed digital-analog-conversion to the coming data and sends the converted analog signal to the quadrature modulation module. After frequency mixing through quadrature modulation, the final outputis playback signal. The requirements are as follows:the maximumrefresh speed of sampling and playback should be500Msps, the data resolution should beno less than12bit, and the maximumread and write speed of Flashshould be240MB/s. In addition, the system does not need to communicate with PC and can be debugged independently, which improves the portability of the system and saves cost.This paper is organized as follows. The background information and related work are reviewed in Section I. Section II and III discuss the five modules of the system.For each module, specific hardware and software design solutions are discussed. The performance of the systemis presented in Section IV, the experimental results show that both the speed of data sampling and playback reach500Msps, the data resolution is12bit, the storage capacity is64Gbit, and the read and write speed of Flash are640MB/s and260MB/s, respectively. Based on these results, the conclusion is drawn that the system can achieve high-speed data sampling storage and playback.