The prm is basically a monopulse secondary surveillance radar ( mssr ) that employs electronically - scanned antennas configured in a circular array 精密跑道監(jiān)系統(tǒng)基本上屬單脈沖二次監(jiān)察雷達,但采用排列成形的電子掃描天線。
For this reasons , this paper advances a new mssr responder which is based on fpga and dsp according to the idea of softwear radio 針對這些缺陷,借鑒軟件無線電思想,本文設(shè)計了一種基于fpga和dsp為平臺的單脈沖二次雷達應(yīng)答信號處理器系統(tǒng)。
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 這種結(jié)構(gòu)的特點是集成度高,通用性強,穩(wěn)定性好,處理速度快,適于模塊化設(shè)計,可以實時處理多個應(yīng)答信號,大大提高了mssr應(yīng)答信號處理能力。
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 本文介紹了一種基于fpga + dsp架構(gòu)的模式s應(yīng)答接收機數(shù)字處系統(tǒng)。該系統(tǒng)采用三種創(chuàng)新算法來實現(xiàn)高密度模式a / c干擾環(huán)境下的模式s應(yīng)答信息接收功能,包括報頭檢測算法、多采樣點多參數(shù)的代碼拾取算法以及基于置信度分析的糾錯算法。
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 它建立在獨立編址、選擇性詢問的基礎(chǔ)之上,能夠解決在模式a / c中存在的信號干擾、有限的信息編碼、幻影( garble )和異步應(yīng)答( fruit )等問題,同時在數(shù)據(jù)鏈路方面有著巨大的潛力。國際上,模式s的數(shù)據(jù)鏈技術(shù)得到了廣泛的關(guān)注,許多國家和組織大力支持基于模式s的通信、導(dǎo)航和監(jiān)視技術(shù)以及航空管理新技術(shù)的研究,許多成果正逐步被國際民用航空組織( icao )所采用。因此,對模式s核心技術(shù)的深入研究對于我國在航空管理、敵我識別、導(dǎo)航等方面的發(fā)展有著重大的意義。
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 本論文介紹二次雷達的基本概念、發(fā)展歷史、工作流程、運作機理以及單脈沖二次雷達的系統(tǒng)原理。重點介紹了actel公司fpga的結(jié)構(gòu)、原理以及fpga的vhdl實現(xiàn)。本文介紹的mssr應(yīng)答信號處理器,可以檢測大于100mv的視頻信號,實時處理40個真實目標,并且支持模式ac和模式6應(yīng)答信號,處理過程中可以根據(jù)模式指示信號在兩種模式下任意切換,送出相應(yīng)模式的報表。