The prm is basically a monopulse secondary surveillance radar ( mssr ) that employs electronically - scanned antennas configured in a circular array 精密跑道监系统基本上属单脉冲二次监察雷达,但采用排列成形的电子扫描天线。
For this reasons , this paper advances a new mssr responder which is based on fpga and dsp according to the idea of softwear radio 针对这些缺陷,借鉴软件无线电思想,本文设计了一种基于fpga和dsp为平台的单脉冲二次雷达应答信号处理器系统。
The merit of this type of hardware systemic architecture is flexible structure , general utility , fit for module design , fast processing and it also can process many respondent signal in real time and develope the ability of mssr responsion signal processing greatly 这种结构的特点是集成度高,通用性强,稳定性好,处理速度快,适于模块化设计,可以实时处理多个应答信号,大大提高了mssr应答信号处理能力。
A kind of mssr mode s plot extractor system based on fpga + dsp architecture is introduced in this paper . this system adopt three algorithms to get information of mode s reply correctly in high dense a / c jamming environments , which are preamble detecting algorithm , codes getting algorithm based on multi - samples and multi - parameters , and error detection and correction algorithm based on confidence analyzing 本文介绍了一种基于fpga + dsp架构的模式s应答接收机数字处系统。该系统采用三种创新算法来实现高密度模式a / c干扰环境下的模式s应答信息接收功能,包括报头检测算法、多采样点多参数的代码拾取算法以及基于置信度分析的纠错算法。
The mssr mode s technology , which was introduced firstly for the purpose of air tranfic control ( atc ) system , is based on the individually addressing and selective interrogation technology . the mode s can overcome many problems exist in mode a / c , such as signal interference , limited aircraft identification , garble and fruit , and provides the ability to build digital data link . many countries and organizations do them best to support researches about the communication , navigation and surveillance technology , which are all based on the mode s , and many productions have been adopted step by step by the international civil aviation organization ( icao ) . so , to research the key technologies of mode s will contribute a lot to the development of domestic aviation system , especially for the air control system , identification friend foe and navigation system 它建立在独立编址、选择性询问的基础之上,能够解决在模式a / c中存在的信号干扰、有限的信息编码、幻影( garble )和异步应答( fruit )等问题,同时在数据链路方面有着巨大的潜力。国际上,模式s的数据链技术得到了广泛的关注,许多国家和组织大力支持基于模式s的通信、导航和监视技术以及航空管理新技术的研究,许多成果正逐步被国际民用航空组织( icao )所采用。因此,对模式s核心技术的深入研究对于我国在航空管理、敌我识别、导航等方面的发展有着重大的意义。
This thesis introduces the elementary concept , evolutive history , working flow and operational principle of secondary surveillance radar and the systemic principle of monopulse secondary surveillance radar . then recommend the structrue and elements of actel ’ fpga and the development and design of fpga based on vhdl . the new responder can detect the video pulse signal upon 100mv and deal with 40 real planes in real time . it also can identify the responding signal of mode a / c and mode 6 and can be swithed freely from one mode to another according to the mode information and transmit the report table of corresponding mode 本论文介绍二次雷达的基本概念、发展历史、工作流程、运作机理以及单脉冲二次雷达的系统原理。重点介绍了actel公司fpga的结构、原理以及fpga的vhdl实现。本文介绍的mssr应答信号处理器,可以检测大于100mv的视频信号,实时处理40个真实目标,并且支持模式ac和模式6应答信号,处理过程中可以根据模式指示信号在两种模式下任意切换,送出相应模式的报表。