MLS导航接收机的一种中频数字化设计  

An Intermediate Frequency Digital Design on MLS Navigation Receiver

作　　者：李昕 LI Xin(The 20th Research Institute of China Electronics Technology Group Corporation,Xi'an 710068,China)

机构地区：[1]中国电子科技集团公司第二十研究所,陕西西安710068

出　　处：《现代信息科技》2021年第11期56-59,63,共5页Modern Information Technology

摘　　要：文章提出了一种中频数字化的微波着陆系统接收机的设计方案,通过对70 MHz MLS中频信号直接带通采样数字化,采用FPGA可编程逻辑器件为核心的通用硬件,来实现MLS中频数字信号处理中的滤波、下变频、相位键控信号解调、幅度解调、峰值检测等功能;并且详细分析了该方案中所采用的几种关键技术的原理,给出了相位键控信号解调、幅度解调功能的软件仿真结果。This paper proposes a design scheme for microwave landing system(MLS)receiver based on intermediate frequency(IF)digitization.Through the direct bandpass sampling digitization of 70 MHz MLS IF signal,and uses the general hardware with FPGA programmable logic device as the core to realize the following functions:filtering,down conversion,phase keying signal demodulation,amplitude demodulation and peak detection in MLS IF digital signal processing;and the principle of several key technologies used in this scheme are analyzed in detail,the software simulation results of phase keying signal demodulation and amplitude demodulation functions are given.

关 键 词：微波着陆系统 带通采样 数字下变频 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] V351.37[自动化与计算机技术—控制科学与工程]