【摘要】 利用大规模集成电路技术和数字处理技术,设计出基于现场可编程门阵列(FPGA)的航管二次监视雷达地面询问编码器系统。对该编码系统的脉冲同步信号、常规模式和S模式中询问信号的原理进行了介绍,基于FPGA实现其功能,并对S模式的CRC编、解码算法进行了验证。仿真试验证实,该系统性能稳定,抗干扰能力强,体积小,便于调试,而且实现方式更具有成本低的优点;同时提出了"雷达显控界面+FPGA+MCU"的架构设计,更方便工程模拟。更多还原

【Abstract】 FPGA-based signal encoding system for Air Traffic Control Secondary Surveillance Radar(SSR)system is proposed,using modern LSI and numeric processing technology.The synchronized pulse signal of this system′s encoding and the interrogating signal of normal-mode and S-mode are implemented and their principles are introduced.The verification of algorithm of encoding and decoding on S Mode is done by using Matlab tool.The simulation experiments indicate that the system has the advantages of stability,well-resisyance,small size,debugging convenience and low cost.Meanwhile,a novel framework design is proposed,including the display-control interface of radar,FPGA and MCU,which makes it more convenient for engineering simulation.更多还原