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Documents 相位编码雷达基于通信指令的空中目标定位技术研究
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  • Author Author: sophie0love
  • Date Created: 21 Nov 2010 1:38 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:49 PM
  • Views 256 views
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相位编码雷达基于通信指令的空中目标定位技术研究

基于通信指令的空中目标定位技术,是利用空中目标发射的通信指令来获取目标的距离和角度信息,完成对目标的精确定位跟踪。由于通信指令信号功率仅需克服单程路径损耗,故可以大大改善接收信噪比,提高雷达的定位跟踪性能。雷达与空中目标通信时,采用直接序列扩频技术来改善通信信噪比,减少误码率,实现隐蔽通信。本文针对相位编码体制雷达如何利用接收到的空中目标发送的对雷达询问脉冲的应答脉冲来实现对空中目标的定位跟踪,以及雷达与空中目标如何利用扩频技术进行通信这两方面展开。本文首先描述了系统的工作过程,给出了雷达与空中目标应答设备总体设计框图。接着,分析了直接序列扩频技术,讨论了雷达与空中目标发射波形相关参数的选取,询问脉冲及上行通信脉冲波形设计,比较了圆锥扫描角度测量跟踪和单脉冲角度测量跟踪。随后,给出了雷达与空中目标收发信号模型,讨论了雷达与空中目标的信号处理与数据处理,着重分析了恒虚警处理,单脉冲和差波束比幅角度测量跟踪和相关解扩,仿真了采用m序列作为扩频码,2DPSK调制,差分相干解调,相关解扩的直接序列扩频通信系统。最后,用MATLAB仿真了雷达及空中目标的信号与数据处理流程,比较了通过信号与数据处理生成的目标航迹与目标的真实航迹,统计了通信误码率。仿真结果验证了信号与数据处理方法的正确性。关键词:单脉冲比幅,直接序列扩频,波形设计,数据处理

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