發(fā)布時間：2018-01-11 20:33

  本文關(guān)鍵詞：高動態(tài)多普勒對多音調(diào)頻信號性能影響研究　出處：《西安電子科技大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 安全遙控 多音組合調(diào)頻 多普勒頻移 鎖相環(huán)

【摘要】：現(xiàn)如今,航天測控在軍事、政治、科技和人們的生活中被廣泛應(yīng)用,安全遙控是其中尤為重要的一環(huán),它關(guān)系著地面人員、建筑物的安全以及航天員逃逸。美國靶場的安全遙控系統(tǒng)普遍采用多音組合調(diào)頻的主字母體制,因其實時性強、可靠性高、安全保密性好等諸多優(yōu)點,可充分滿足安全遙控任務(wù)的要求,成為國內(nèi)外研究熱點。由于火箭、導(dǎo)彈等飛行器從發(fā)射、入軌到回收是一種高速高動態(tài)的飛行場景,導(dǎo)致接收端的測控信號存在不可避免的多普勒頻率偏移,對正確解調(diào)產(chǎn)生影響。有效的多普勒頻移估計和補償可以消除頻偏,提高了安控系統(tǒng)的性能。本文對采用多音組合調(diào)頻的安全遙控體制進行了系統(tǒng)的研究,所取得的主要研究成果為:1.系統(tǒng)的研究了采用多音組合調(diào)頻的主字母體制,推導(dǎo)了這種體制的漏指令概率、虛指令概率、誤指令概率等性能指標,結(jié)合調(diào)制過程和解調(diào)過程分析了該體制的實時性、可靠性和安全保密性。并將其和國內(nèi)傳統(tǒng)的PCM-PSK-FM安全遙控體制進行各方面比較和性能評估,分析表明,采用多音組合調(diào)頻的主字母體制在安全遙控特殊的任務(wù)背景下獨具優(yōu)勢。2.利用主字母通信體制的基本原理和關(guān)鍵技術(shù)構(gòu)建了發(fā)射機仿真模型和接收機仿真模型,研究了高斯白噪聲信道下該體制的誤符號率,并進行MATLAB仿真。3.介紹了多普勒頻移產(chǎn)生的原因以及其對接收信號的影響,介紹了多普勒頻移補償技術(shù)的發(fā)展歷程和研究現(xiàn)狀。文中模擬了兩種低動態(tài)多普勒頻移和一種高動態(tài)多普勒頻移,研究了這三種情況下主字母體制對多普勒頻移的抵抗能力。為進一步提高系統(tǒng)性能,將鎖相環(huán)嵌入到接收機中,用于對普勒頻移的估計和后續(xù)信號處理中的補償,消除了多普勒頻移帶來的影響,提高了主字母體制性能。4.采用GUI設(shè)計了采用多音組合調(diào)頻的安全遙控用戶界面。
[Abstract]:Nowadays, space TT & C is widely used in military, politics, science and technology and people's life. The safety of buildings and the escape of astronauts. The safety remote control system of American shooting range generally adopts the master letter system of multi-tone combination frequency modulation, because of its many advantages such as high real-time, high reliability, good security and so on. It can fully meet the requirements of the safe remote control mission, and has become a research hotspot at home and abroad. Because of the rocket, missile and other aircraft from launch, orbit to recovery is a high speed and high dynamic flight scene. As a result, the Doppler frequency offset of the receiver is inevitable, which has an impact on the correct demodulation. Effective Doppler shift estimation and compensation can eliminate the frequency offset. The performance of safety control system is improved. In this paper, the security remote control system with multi-tone combination frequency modulation is studied systematically. The main research results are as follows: 1. The main alphabet system using multi-tone combination frequency modulation is studied systematically, and the performance indexes of this system, such as the probability of missing instruction, the probability of virtual instruction and the probability of false instruction, are deduced. Combining the modulation process and demodulation process, the real-time, reliability and security confidentiality of the system are analyzed, and the comparison and performance evaluation between the system and the traditional PCM-PSK-FM security remote control system are carried out. Analysis shows. The master letter system with multi-tone combination frequency modulation has its own advantage under the background of the special task of secure remote control. 2. The transmitter simulation model and receiver simulation mode are constructed by using the basic principle and key technology of the master letter communication system. Type. In this paper, the symbol error rate in Gao Si white noise channel is studied, and the MATLAB simulation. 3. The causes of Doppler frequency shift and its influence on the received signal are introduced. The development and research status of Doppler shift compensation technology are introduced. Two kinds of low dynamic Doppler frequency shift and one high dynamic Doppler frequency shift are simulated in this paper. In order to further improve the performance of the system, the PLL is embedded into the receiver. It is used to estimate the Doppler shift and compensate for the subsequent signal processing to eliminate the influence of Doppler shift. The performance of the main alphabet system is improved. A secure remote control user interface using multi-tone combination frequency modulation is designed by using GUI.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN911.3

【參考文獻】

相關(guān)期刊論文 前3條

1 林墨;深空測控通信技術(shù)發(fā)展趨勢分析[J];飛行器測控學報;2005年03期

2 楊榮芳;張廣興;胥春;;靶場GPS數(shù)據(jù)實時傳輸對安控時延的影響及修正[J];指揮控制與仿真;2007年04期

3 譚維熾;從測控系統(tǒng)到數(shù)據(jù)系統(tǒng)[J];遙測遙控;2000年02期

，

本文編號：1411122