基于前导脉冲辅助的相位调制1090ES信号载频同步算法  

Algorithm of Carrier Frequency Synchronization of Phase Modulated 1090ES Signals Based on Preamble Pulses Aided

作　　者：孙清清[1] 王洪[1] 宋妍[1] 姒强[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《现代雷达》2016年第5期22-25,共4页Modern Radar

基　　金：国家自然科学基金重点项目(61139003)

摘　　要：基于相位调制扩容1090ES信号为ADS-B带来新的功能和应用,载波频率同步是扩容信号需解决的一项关键技术。针对扩容1090ES信号的突发载频同步问题,提出了一种基于频偏捕获和相位误差跟踪环的快速同步方法,频偏捕获采用前导辅助脉冲相关性判决进行二叉树频率搜索,捕获载频偏差并校正得到频偏较小的基带信号,相位误差跟踪环实现对小频偏信号进行频率估计和补偿。仿真结果表明:该方法适用于基于相位调制的扩容1090ES信号接收系统。Encoding phase information on 1 090 MHz extended squitter（ 1090ES） signals is a promising technical method for next generation ADS-B systems,carrier frequency synchronization is the key technique for phase modulated 1090 ES signals. An carrier frequency synchronization algorithm is proposed in this paper,based on frequency acquisition and phase error tracking loop,in which binary search tree method based on correlation decision between local signals and input reply signals is used to achieve frequency acquisition for large frequency offset signals and phase error tracking loop is used to achieve small frequency offset estimation and correction. The simulation results show that this algorithm can be applied to the receiver system of phase modulated 1090 ES.

关 键 词：1090ES 相位调制 载频同步 二叉树搜索 相位跟踪环 

分 类 号：V355.1[航空宇航科学与技术—人机与环境工程]