应答着陆系统测角方案设计

摘要

A digital circuit scheme was designed for realizing angle measurement based on the study on basic angle measurement principle of Transponder Landing System (TLS). Then the key techniques of digital down converter and the high-precision digital phase detector were analyzed. The CORDIC algorithm was used in the design of digital phase detector taking FPGA as the platform, and computer simulation was made for the designed scheme in Quartus II environment. The simulation result showed that the designed scheme was feasible, effective, easy to realize, and can meet the precision requirement.%从应答着陆系统的基本测角原理入手,设计了系统角度测量的数字电路实现方案.分析了数字下变频和高精度数字鉴相等关键技术.以FPGA为平台,采用CORDIC算法设计数字鉴相器,并在QuartusⅡ环境下进行方案的计算机仿真分析.结果表明,该方案是可行、有效的,能满足系统的精度要求,且易于实现.