The main contents are as follows : 1 . mode s extended squitter enhanced reception techniques , including preamble detection , re - triggering and data process , are investigated in detail 主要内容为: 1 .详细研究了模式s扩展应答信号的增强接收技术,包括报头检测、重触发和数据处理等。
The hardware of the respondent processing is based on fpga + dsp structure . the reception of mode s and mode a / c could be coinstantaneous , and the processing is unattached 该项目的应答数字信号处理硬件平台,采用fpga与dsp的混合结构,可以同时接收模式s与a / c模式的应答信号,但是两者相互独立,互不影响。
By analysis , using this the technology , true mode s preamble will be detected correctly , pick up respondent information , process the data , in the case of high fruit ( mode a / c fruit ) environments 经分析,该应答技术能够在高干扰率( a / c模式的信号干扰)环境下正确地检测真实的模式s报头脉冲,提取应答代码,进行应答信号的处理。
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。
Furthermore , it discusses how to improve the reliability and consistency of the system and how to design the constraint files of place and route . at the present , we have tested this responder system roundly . this system is reliable steady and highly accurate and meet our expectant aim 目前,本论文介绍的单脉冲二次监视雷达应答信号处理器已经完成全方面的测试,系统具有较高的可靠性、稳定性和系统精度,满足设计要求,达到了预期的目的,可以应用于单脉冲二次雷达接收机上。
The traditional ssr responder has poor performance in its stability and reliability because it is mostly made up of single component and middle or small scaled integrated circuits . it can not meet the requirements of high - density and large amount replies for its limit performance of real time processing ability 由于传统的二次雷达( secondarysurveillanceradar )应答信号处理器采用分立元件和中小规模集成电路设计,其稳定性低,可靠性差,实时处理能力有限,不能完成高密度、大容量的应答。
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。
In this thesis , the data process of mode s extended reply is the main research object . the basic principle of mode s system has been analyzed . then the algorithm of mode s extended reply enhanced reception techniques is analyzed , the hardware realization based on fpga and dsp is expounded , simulation results of the main module is given 本论文以模式s扩展应答信号的接收处理为主要研究对象,在深入分析模式s系统原理的基础上,以应答处理中的数据处理为重点,阐述了用fpga + dsp的构架实现模式s扩展应答信号接收处理的算法和硬件实现,并给出了主要模块的仿真结果。
