基于FPGA的多通道雷达数据回放系统设计

doi:10.16180/j.cnki.issn1007-7820.2023.02.001

Abstract

Abstract:

In order to solve the problem of effective verification of radar real-time signal processing function and performance, a wideband and narrowband integrated radar echo playback system with multiple channels is designed and implemented. The system transfers the radar echo data to the real-time signal processing system according to the time sequence and data rate of the radar operation, so as to reproduce the target tracking scene and realize the effective verification of the real-time signal processing function and performance of the radar. The data playback system comprises a disk array server and two PCIe fiber boards. Based on the Xilinx series products, the PCIe DMA control process and response mechanism are further adjusted according to the system characteristics, and the high-speed batch transmission of radar echo data from the server to the fiber board is realized. According to the working mechanism of the radar and the echo data structure, the FPGA playback control state machine and related function modules are designed, and the radar echo data is transmitted from the optical fiber board to the real-time processing system in strict accordance with the working sequence and data rate of the radar. To ensure the synchronization between multiple boards when wideband and narrowband echo playback is carried out at the same time, the study proposes two methods based on software and hardware respectively. The test results show that the system realizes the synchronous playback of wide-band and narrow-band radar echo data between boards, each data type supports 6 parallel data channels, and the peak data playback rate can reach 1 920 MB·s^-1.The designed system can be directly integrated in the origin radar hardware platform, without adding extra circuit boards or cables, which has good generality and convenience. The system has been successfully applied in a multi-function phased array radar.

Key words: data playback, PCIe, DMA, FPGA, multi-channel, state machine, radar timing control, synchronization control

CLC Number:

TN913

ZHAO Yingxiao,SU Yang. Design of A Multi-Channel Radar Echo Playback System Based on FPGA[J].Electronic Science and Technology, 2023, 36(2): 1-7.

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Design of A Multi-Channel Radar Echo Playback System Based on FPGA

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