發(fā)布時(shí)間：2018-04-02 01:21

  本文選題：雷達(dá)通信一體化　切入點(diǎn)：信號(hào)能量共享　出處：《電子科技大學(xué)》2014年碩士論文

【摘要】：現(xiàn)今武器平臺(tái)受到的威脅日趨增多,所面臨的電磁環(huán)境亦更為復(fù)雜。為應(yīng)對(duì)這一狀況,武器平臺(tái)必須裝備愈來愈多的電子設(shè)備,這無疑會(huì)影響其機(jī)動(dòng)性,帶來電磁兼容問題,進(jìn)而降低整體作戰(zhàn)效能。為減小武器平臺(tái)的體積和電磁干擾,一種有效的途徑就是實(shí)現(xiàn)電子裝備的一體化。雷達(dá)與通信作為武器平臺(tái)中的兩個(gè)重要組成部分,二者一體化的實(shí)現(xiàn)意義重大。為最大限度的實(shí)現(xiàn)雷達(dá)通信一體化,人們提出了信號(hào)能量共享的概念�；谛盘�(hào)能量共享的雷達(dá)通信一體化系統(tǒng),就是利用系統(tǒng)公共資源,使得所設(shè)計(jì)的共享信號(hào)在實(shí)現(xiàn)雷達(dá)目標(biāo)探測(cè)的同時(shí),能夠進(jìn)行數(shù)據(jù)的高效傳輸。本文基于信號(hào)能量共享的思想,利用OFDM(Orthogonal Frequency Division Multiplexing,正交頻分復(fù)用)技術(shù),對(duì)雷達(dá)通信一體化信號(hào)共享做了大量的研究,主要工作和創(chuàng)新如下:1)分析了傳統(tǒng)雷達(dá)系統(tǒng)與通信系統(tǒng)之間的差異性和相似性,以及雷達(dá)通信一體化實(shí)現(xiàn)所帶來的資源約束問題。在此基礎(chǔ)上,建立了對(duì)雷達(dá)通信共享信號(hào)進(jìn)行評(píng)價(jià)和設(shè)計(jì)的基本準(zhǔn)則。2)在分析現(xiàn)有的基于OFDM和基于偽隨機(jī)序列的雷達(dá)通信一體化實(shí)現(xiàn)方式缺陷的基礎(chǔ)上,通過將OFDM技術(shù)與擴(kuò)頻技術(shù)相結(jié)合設(shè)計(jì)了一種新的共享信號(hào),即MC-CDMA(Multicarrier CDMA,多載波碼分多址)共享信號(hào)。擴(kuò)頻技術(shù)的使用,使得該共享信號(hào)具有更低的截獲概率、更強(qiáng)的通信保密性以及潛在的多址能力,同時(shí)較現(xiàn)有OFDM共享信號(hào)的峰均功率比低4d B以上。3)對(duì)MC-CDMA共享信號(hào)和LFM信號(hào)模糊函數(shù)進(jìn)行了對(duì)比分析,前者具有圖釘形的模糊函數(shù),但距離和多普勒旁瓣較高。針對(duì)這一問題,本文就MC-CDMA信號(hào)特殊的時(shí)頻域結(jié)構(gòu),引入了一種基于調(diào)制符號(hào)的雷達(dá)信號(hào)處理算法,并利用加窗旁瓣抑制技術(shù)對(duì)其進(jìn)行了改進(jìn),加窗加權(quán)使得MC-CDMA信號(hào)距離旁瓣最大可降低47d B。此外,該算法可以徹底消除共享信號(hào)中所調(diào)信息對(duì)目標(biāo)檢測(cè)的影響,較傳統(tǒng)的基于相關(guān)的處理方法,距離旁瓣最大可降低45 d B。4)針對(duì)OFDM信號(hào)峰均功率比較大以及CE-OFDM(Constant Envelope OFDM,恒包絡(luò)OFDM)信號(hào)載波間干擾有待降低的缺陷,結(jié)合恒包絡(luò)調(diào)制技術(shù)以及MSK信號(hào)快速滾降的頻譜特性設(shè)計(jì)了一種新的共享信號(hào),即CE-MSK-OFDM共享信號(hào)。該信號(hào)使得OFDM信號(hào)峰均功率比降至0d B這一理想狀態(tài),并有效降低CE-OFDM信號(hào)的載波間干擾。5)將CE-MSK-OFDM共享信號(hào)與理想相位編碼下的OFDM雷達(dá)信號(hào)模糊函數(shù)進(jìn)行了對(duì)比。仿真表明,CE-MSK-OFDM共享信號(hào)具有更好的模糊函數(shù)特性,所攜帶的通信信息幾乎不會(huì)對(duì)系統(tǒng)雷達(dá)性能帶來負(fù)面的影響。為便于后續(xù)系統(tǒng)波形參數(shù)的設(shè)計(jì),還對(duì)各個(gè)參數(shù)對(duì)其模糊函數(shù)性能的影響進(jìn)行了仿真分析。6)從系統(tǒng)的角度出發(fā),對(duì)系統(tǒng)波形參數(shù)、工作模式以及鏈路維護(hù)進(jìn)行了設(shè)計(jì)與分析,并分別構(gòu)建了基于MC-CDMA和CE-MSK-OFDM的雷達(dá)通信一體化系統(tǒng)框架,對(duì)系統(tǒng)的雷達(dá)性能和通信性能進(jìn)行了仿真分析。仿真表明,鏈路連通區(qū)內(nèi)平均吞吐率在2 Mbps以上,在良好的波束控制下,可以達(dá)到更高�？梢�,本文所設(shè)計(jì)的兩種雷達(dá)通信共享信號(hào),是可以滿足戰(zhàn)場(chǎng)應(yīng)用要求的。
[Abstract]:The weapon platform threat is increasing, the electromagnetic environment is more complicated. In response to this situation, the weapon platform must be electronic equipment more and more, which will undoubtedly affect the mobility, bring electromagnetic compatibility problems, thereby reducing the overall operational efficiency. As to reduce the volume of the weapon platform and electromagnetic interference, a which is the effective way to realize the integration of electronic equipment. The radar and communication as the two important part of weapon platform, the integration of the two to achieve significant. For the realization of radar communication integration to the maximum, people put forward the concept of signal sharing. Radar communication integration system based on signal energy sharing, is the use of the system of public resources, the design of the shared signal in the realization of radar target detection at the same time, it can efficiently transfer data. Based on the signal The amount of sharing ideas, using OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) technology of radar communication integration signal sharing has done a lot of research, the main work and innovation are as follows: 1) analyze the differences between the traditional radar system and communication system and similarity, and radar communication integration to realize the resource constraint problem brings. On this basis, the establishment of evaluation and design of the basic principles of.2 radar communication sharing signal) based on analyzing current OFDM and pseudo random sequence based on a radar communication way based on the defects, the OFDM technology and spread spectrum technology combined with the design of a new shared the signal, namely MC-CDMA (Multicarrier CDMA, multi carrier CDMA) sharing signal. Use spread spectrum technology, which makes the sharing signal has lower intercept probability, stronger communication Confidentiality and potential multiple access capability, at the same time compared with the existing OFDM 4D B low share signal peak to average power ratio of more than.3) fuzzy function analyses MC-CDMA share and LFM signals, the former has a thumbtack ambiguity function, but the distance and Doppler high sidelobe. To solve this problem, the time and frequency domain the special structure of MC-CDMA signal, we introduce a method of radar signal processing based on modulation symbols, and it was improved by using window sidelobe suppression technology, windowed MC-CDMA signal has the maximum weighted distance sidelobe can be reduced by 47D B. in addition, the algorithm can eliminate the influence of information sharing on the target detection signal. Processing method based on correlation over the maximum distance sidelobe can be reduced by 45 D B.4) for OFDM signal peak to average power ratio and CE-OFDM (Constant Envelope OFDM OFDM, the constant envelope signal carrier) To reduce the interference between the defect, a new shared signal design with spectrum characteristics of constant envelope modulation technology and MSK signal fast rolloff, namely CE-MSK-OFDM signal. The signal sharing makes OFDM signal peak to average power ratio of B to 0d this ideal state, and effectively reduce the CE-OFDM signal carrier interference.5) will CE-MSK-OFDM shared OFDM radar signal and the ideal signal phase encoding between the ambiguity function. Simulation results show that CE-MSK-OFDM has better signal ambiguity function sharing, negative impact on communication information carried by the radar system does little to facilitate subsequent performance. For the design of system parameters, the influence of various parameters on the fuzzy function is simulated.6) from the perspective of the system, the system of waveform parameters, working mode and link maintenance for the design and analysis, and Respectively constructs the framework of radar communication integration system of MC-CDMA and CE-MSK-OFDM based on radar performance and the performance of communication system is simulated. Simulation results show that the average throughput of link connectivity rate in the region more than 2 Mbps, in good beam control, can achieve higher. Therefore, the design of the two kinds of radar communication share the signal, it can meet the application requirements of the battlefield.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN957.51

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 賈懷義,宮劍;OFDM-CDMA系統(tǒng)建模仿真及誤碼率分析[J];系統(tǒng)仿真學(xué)報(bào);2002年10期

2 李曉柏;楊瑞娟;陳新永;;多功能雷達(dá)自組網(wǎng)通信性能研究[J];現(xiàn)代防御技術(shù);2012年06期

相關(guān)碩士學(xué)位論文 前1條

1 許蔚樂;OFDM系統(tǒng)抑制峰均功率比算法的研究[D];上海交通大學(xué);2011年

，

本文編號(hào)：1698163