无人机数据链判决反馈均衡器的FPGA实现

从无人机数据链的需求出发,使用现场可编程门阵列(FPGA)实现判决反馈均衡器(DFE),以消除无人机数据链中的码间干扰。文中利用System Generator对判决反馈均衡器进行建模,将模型转换为硬件,并通过硬件协调仿真在Xilinx virtex5 XC5VSX50T芯片上验证。仿真结果表明,在不同信道条件下,判决反馈均衡器能很好地克服码间干扰,适用于无人机信道。本文为无人机高速数据链均衡器的实现打下基础。

FPGA implementation of decision feedback equalizer in UAV data link system

Decision Feedback Equalizer（DFE） is implemented by Field Programmable Gate Array, （FPGA） in order to eliminate inter-symbol interference. A model of decision feedback equalizer is built based on System Generator. The model is converted into hardware, and its function is verified through hardware co-simulation on Xilinx virtex5 XCSVSXSOT chip. Simulation result shows that the equalizer can overcome inter-symbol interference perfectly under different channel conditions, and is fit for the channel of UAV. This work lays the foundation for the realization of high-speed data link equalizer for UAV.