采用扩频技术的数字天线跟踪系统设计  

Design of Digital Antenna Tracking System with Spread Spectrum Technology

作　　者：方正[1,2,3] 丁勇飞[1] 龚诚[1] 

机构地区：[1]中国航空无线电电子研究所,上海200241 [2]航空电子系统综合技术重点实验室,上海200233 [3]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电讯技术》2014年第5期615-620,共6页Telecommunication Engineering

基　　金：航空科学基金资助项目(2013ZC15003)~~

摘　　要：在介绍雷达领域传统目标跟踪方式基础上,设计了一种基于扩频体制并有效融合"模极值捕获跟踪"和"数字导引"的数字天线跟踪系统。通过精心设计通信帧格式,并采用具有良好正交性的PN码(Walsh)序列"携带"GPS信息用于数字导引,使得系统在具有30 dB高同步捕获增益的前提下同时具有可控的扩频抗干扰增益,在初始捕获和抗干扰通信过程中发挥重要作用。系统采用具有快速算法的自适应滤波技术对数字导引信息进行置信度分析。建模仿真与飞行试验表明,该方法相对传统体制具有更高的灵活性和可靠性。A new digital antenna tracking system which combines both module maximum tracking and digit-al navigation is designed based on introduction of traditional radar antenna target tracking method. The communication frame structure is delicately designed, which ensures both 30 dB high synchronization gain and a reliable wireless transmission. Besides, adaptive filtering with fast calculating method is applied during digital navigation to ensure the credibility of the information. Simulation and flight tests demonstrate that the proposed two-mode antenna tracking method brings much more flexibility and reliability.

关 键 词：PD雷达 目标跟踪 天线跟踪系统 模极值跟踪 数字导引 自适应滤波 

分 类 号：TN953[电子电信—信号与信息处理] TN820[电子电信—信息与通信工程]