S模式应答机中频数字信号处理方法研究  

Study on Medium Frequency Signal Processing Method of S Mode Transponder

作　　者：吴秀明 贺星 WU Xiuming;HE Xing

机构地区：[1]中电科西北集团有限公司西安分公司,西安710068

出　　处：《现代导航》2018年第5期343-347,共5页Modern Navigation

摘　　要：S模式应答机在二次雷达系统中担任着重要的角色。结合工程实际,提出一种基于FPGA的S模式应答机中频数字信号处理方法,针对S模式特殊信号格式和突发询问的特点,给出了一种快速载波频率捕获的DPSK解调算法,提高了S模式应答机的灵敏度,降低了硬件使用资源。The S mode transponder plays an important role in secondary radar system.Combined with the engineering practice,this paper presents a medium frequency signal processing method based on FPGA.According to the special signal format of S mode and the characteristics of burst query,a fast carrier head acquisition algorithm is presented,which improves the sensitivity of S mode transponder and reduces the use resource of hardware.

关 键 词：S模式应答机 中频信号 载波捕获 

分 类 号：V243[航空宇航科学与技术—飞行器设计]