基于FPGA的相关干涉仪测向算法的设计与实现

Fast operation of correlation interferometer direction finding algorithm suitable for FPGA implementation

摘要:

为了适应日渐复杂的电磁对抗环境,有别于传统的处理器采用串行架构使用IQ数据进行测向算法运算,为了能更快速、更稳定的计算出相位差,提出一种优化后的相关干涉仪测向算法架构并在FPGA上实现设计。详细给出FPGA测向系统架构和运算流程,并结合实际采取一个稳定的、经济实惠的系统架构。为了满足后续实际应用需求,在Xilinx的xc7vx690tffg1927-2为逻辑控制单元的载板进行板级测试中,验证了FPGA进行相关干涉仪测向识别结果的稳定性和高效性,经过验证发现,相较于传统的FPGA相关干涉仪测向架构,经实验测试后实现了所提出的架构在LUT资源占用率上降低了39.5%,测向速度提高17%,可处理信号带宽80MHz,跳速高达1200跳/s。

Abstract:

In order to adapt to the increasingly complex electromagnetic countermeasures environment, an optimized correlation interferometer direction finding algorithm architecture is proposed and designed on FPGA in order to calculate the phase difference more quickly and stably. The architecture and operation flow of FPGA direction finding system are given in detail, and a stable and economical system architecture is adopted in combination with practice. In order to meet the requirements of subsequent practical applications, Xilinx's xc7vx690tffg1927-2 board level test for the carrier board of the logic control unit verifies the stability and efficiency of the recognition results of correlation interferometer direction finding by FPGA. After verification, it is found that compared with the traditional FPGA correlation interferometer direction finding architecture, After experimental test, the proposed architecture can reduce the resource occupancy of LUT by 39.5%, increase the direction finding speed by 17%, process signal bandwidth of 80MHz, and jump speed of up to 1200 hops /s.