【摘要】：北斗衛(wèi)星導(dǎo)航系統(tǒng)是中國自主研制的衛(wèi)星導(dǎo)航系統(tǒng),因其能提供全天候、全方位的導(dǎo)航、定位、授時(shí),短報(bào)文服務(wù),在國防和經(jīng)濟(jì)建設(shè)中發(fā)揮了重要作用。近年來,全球衛(wèi)星導(dǎo)航系統(tǒng)更是在世界各個(gè)國家得到迅速的普及和應(yīng)用。但是由于衛(wèi)星信號功率很低,軍事上經(jīng)常存在敵方的有意電磁波干擾以及衛(wèi)星導(dǎo)航應(yīng)用電磁波環(huán)境的日益復(fù)雜,導(dǎo)航終端很容易受到干擾信號的影響而無法正常工作。因此,目前各國都很重視衛(wèi)星導(dǎo)航系統(tǒng)抗干擾技術(shù)的研究。在此背景下,研究導(dǎo)航接收機(jī)抗干擾技術(shù)具有非常重要的意義。傳統(tǒng)的接收機(jī)抗干擾技術(shù)分別從時(shí)域、頻域以及空域三個(gè)方面對信號進(jìn)行處理。時(shí)域處理算法比較復(fù)雜,自適應(yīng)性較差;頻域處理算法能夠有效地抑制窄帶干擾,但在抑制寬帶干擾時(shí)會嚴(yán)重削弱有用信號;純空域算法能夠處理的干擾數(shù)目受限于陣元個(gè)數(shù)。因此,本文采用空時(shí)聯(lián)合濾波STAP技術(shù)來對接收到的導(dǎo)航信號進(jìn)行自適應(yīng)處理。該技術(shù)能夠在不增加天線陣元個(gè)數(shù)的情況下,通過空域與時(shí)域相結(jié)合的方式增加處理信號源的個(gè)數(shù)和種類,大大提高了接收機(jī)的抗干擾能力。傳統(tǒng)的STAP技術(shù)在性能上有兩方面的不足:(1)算法需要對觀測信號進(jìn)行協(xié)方差矩陣的求逆運(yùn)算,計(jì)算量大,計(jì)算復(fù)雜度高;(2)需要預(yù)先估計(jì)期望信號的先驗(yàn)信息,當(dāng)估計(jì)的先驗(yàn)信息出現(xiàn)誤差時(shí),會使接收到的衛(wèi)星信號功率衰減,甚至使接收機(jī)喪失定位導(dǎo)航能力。針對傳統(tǒng)的STAP技術(shù)計(jì)算復(fù)雜度高的問題,本文利用改進(jìn)的兩步迭代變步長最小均方誤差(LMS)算法以及改進(jìn)的變遺忘因子遞歸最小二乘(RLS)算法對空時(shí)濾波器的加權(quán)值進(jìn)行計(jì)算,從而降低計(jì)算復(fù)雜度;針對空時(shí)濾波技術(shù)先驗(yàn)信息不準(zhǔn)確的問題,本文提出利用矢量跟蹤環(huán)輸出的導(dǎo)航信號作為空時(shí)濾波算法的參考信息,由于不需要提前估計(jì)先驗(yàn)信息,大大提高了算法的穩(wěn)健性;本文還研究了在空時(shí)濾波器的A/D輸出端添加頻域LMS濾波器的方法來抑制與導(dǎo)航信號的同方向的窄帶干擾,從而增強(qiáng)導(dǎo)航接收機(jī)的干擾抑制能力。最后,通過現(xiàn)有的接收機(jī)平臺采集導(dǎo)航數(shù)據(jù),并對實(shí)測數(shù)據(jù)進(jìn)行抗干擾處理,驗(yàn)證了本文所提算法能夠使算法的計(jì)算量降低,穩(wěn)健性提高,最終使導(dǎo)航接收機(jī)的干擾抑制性能增強(qiáng)。
[Abstract]:Beidou satellite navigation system is a satellite navigation system independently developed by China. It plays an important role in national defense and economic construction because it can provide all-weather, omnidirectional navigation, positioning, time service and short message service. In recent years, the global satellite navigation system has been popularized and applied rapidly in every country of the world. However, because the satellite signal power is very low, the military often exists the enemy's intentional electromagnetic wave interference and the satellite navigation application electromagnetic wave environment is increasingly complex, the navigation terminal is easily affected by the interference signal and can not work normally. Therefore, many countries attach great importance to the research of anti-jamming technology of satellite navigation system. Under this background, it is very important to study the anti-jamming technology of navigation receiver. The traditional receiver anti-jamming technology processes the signal in time domain, frequency domain and spatial domain respectively. The time domain processing algorithm is more complex and the adaptive ability is poor; the frequency domain processing algorithm can effectively suppress narrowband interference, but it will seriously weaken the useful signal when suppressing the wideband interference; the pure spatial domain algorithm can deal with the number of interference limited by the number of array elements. Therefore, the space-time joint filtering (STAP) technique is used to process the received navigation signal adaptively. Without increasing the number of antenna array elements, the technique can increase the number and types of signal sources by combining spatial domain and time domain, and greatly improve the anti-jamming ability of the receiver. The traditional STAP technique has two shortcomings in performance: (1) the algorithm needs to perform covariance matrix inversion of the observed signal, which requires a large amount of computation and high computational complexity; (2) the prior information of the desired signal needs to be estimated in advance. When the estimated prior information errors occur, the received satellite signal power will be attenuated, and even the receiver will lose the positioning and navigation ability. Aiming at the problem of high computational complexity of traditional STAP technique, this paper calculates the weighted value of space-time filter by using the improved two-step iterative variable step size minimum mean square error (LMS) algorithm and the improved variable forgetting factor recursive least square (RLS) algorithm. In order to reduce the computational complexity, aiming at the problem of inaccurate prior information of space-time filtering technology, this paper proposes to use the navigation signal output from vector tracking loop as the reference information of space-time filtering algorithm, because there is no need to estimate prior information in advance. The robustness of the algorithm is greatly improved, and the method of adding frequency-domain LMS filter to the A / D output of space-time filter is studied to suppress the narrowband interference in the same direction as the navigation signal, so as to enhance the interference suppression ability of the navigation receiver. Finally, through the existing receiver platform to collect navigation data, and the anti-jamming processing of the measured data, it is verified that the algorithm proposed in this paper can reduce the calculation amount and improve the robustness of the algorithm. Finally, the interference suppression performance of the navigation receiver is enhanced.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN965.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫曉立;;衛(wèi)星導(dǎo)航系統(tǒng),戰(zhàn)略裝備的制高點(diǎn)[J];工業(yè)設(shè)計(jì);2011年05期

2 榕葉;衛(wèi)星導(dǎo)航系統(tǒng)管理擁擠的空域[J];國外科技動態(tài);1995年08期

3 劉漪;另類的衛(wèi)星導(dǎo)航儀——PDA導(dǎo)航儀[J];電子世界;2002年06期

4 帥平,曲廣吉,向開恒;現(xiàn)代衛(wèi)星導(dǎo)航系統(tǒng)技術(shù)的研究進(jìn)展[J];中國空間科學(xué)技術(shù);2004年03期

5 ;第二代北斗衛(wèi)星導(dǎo)航系統(tǒng)簡介及應(yīng)用展望[J];衛(wèi)星與網(wǎng)絡(luò);2008年11期

6 朱筱虹;徐瑞;趙金賢;王森;唐云;;衛(wèi)星導(dǎo)航系統(tǒng)標(biāo)準(zhǔn)現(xiàn)狀分析[J];無線電工程;2010年12期

7 范本堯;;衛(wèi)星導(dǎo)航系統(tǒng)及其在空天安全中的重要作用[J];航天器工程;2011年03期

8 趙鵬;張寧;張玉;;基于衛(wèi)星導(dǎo)航系統(tǒng)的對流層模型分析[J];計(jì)算機(jī)與網(wǎng)絡(luò);2012年16期

9 劉春寶;;國外衛(wèi)星導(dǎo)航系統(tǒng)近期發(fā)展[J];國際太空;2013年04期

10 李作虎;席歡;;日本衛(wèi)星導(dǎo)航系統(tǒng)發(fā)展與思考[J];衛(wèi)星與網(wǎng)絡(luò);2013年10期

相關(guān)會議論文 前10條

1 陳劉成;胡彩波;謝廷峰;劉偉;;太陽風(fēng)暴對衛(wèi)星導(dǎo)航系統(tǒng)的影響分析[A];第二屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會電子文集[C];2011年

2 王宇;黃旭峰;張之學(xué);劉建成;;衛(wèi)星導(dǎo)航系統(tǒng)運(yùn)控段智能故障診斷系統(tǒng)設(shè)計(jì)[A];第三屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會電子文集——S08衛(wèi)星導(dǎo)航模型與方法[C];2012年

3 周坤芳;魯俊;;國內(nèi)外衛(wèi)星導(dǎo)航系統(tǒng)現(xiàn)狀及發(fā)展趨勢[A];第四屆廣東海事高級論壇論文集[C];2012年

4 蔡洪亮;;衛(wèi)星導(dǎo)航系統(tǒng)及其在空天安全中的應(yīng)用[A];第四屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會論文集-S1 北斗/GNSS導(dǎo)航應(yīng)用[C];2013年

5 劉曉萍;劉利;黃雙臨;孫偉杰;胡湘華;栗靖;;衛(wèi)星導(dǎo)航系統(tǒng)應(yīng)急任務(wù)規(guī)劃調(diào)度方法[A];第四屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會論文集-S5 衛(wèi)星導(dǎo)航增強(qiáng)與完好性監(jiān)測[C];2013年

6 周軒;李廣俠;蔡錠波;程佳亮;;衛(wèi)星導(dǎo)航系統(tǒng)反欺騙技術(shù):回顧與展望[A];第四屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會論文集-S7 北斗/GNSS用戶終端技術(shù)[C];2013年

7 蔚保國;甘興利;李雋;;國際衛(wèi)星導(dǎo)航系統(tǒng)測試試驗(yàn)場發(fā)展綜述[A];第一屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會論文集（中）[C];2010年

8 董成喜;王健;蔣春芳;;衛(wèi)星導(dǎo)航系統(tǒng)頻率軌道資源利用方案分析[A];第二屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會電子文集[C];2011年

9 ;衛(wèi)星導(dǎo)航系統(tǒng)地面段可靠性測試方法研究[A];第三屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會電子文集——S06北斗/GNSS測試評估技術(shù)[C];2012年

10 韓雪峰;李建文;于勝利;王豐;;區(qū)域衛(wèi)星導(dǎo)航系統(tǒng)在中國地區(qū)的衛(wèi)星可見性仿真分析[A];第三屆中國衛(wèi)星導(dǎo)航學(xué)術(shù)年會電子文集——S01北斗/GNSS導(dǎo)航應(yīng)用[C];2012年

相關(guān)重要報(bào)紙文章 前10條

1 宗儀;華南光電汽車衛(wèi)星導(dǎo)航系統(tǒng)進(jìn)軍亞洲[N];常德日報(bào);2007年

2 本報(bào)專稿 虞非凡;中國力爭衛(wèi)星導(dǎo)航系統(tǒng)全球領(lǐng)導(dǎo)地位[N];世界報(bào);2007年

3 董愛波;俄“格洛納斯”衛(wèi)星導(dǎo)航系統(tǒng)正式投入商用[N];人民日報(bào);2007年

4 記者 謝思佳;全國六成車載導(dǎo)航儀廣東造[N];南方日報(bào);2008年

5 孟 華;衛(wèi)星導(dǎo)航系統(tǒng)民用市場前景廣闊[N];中國高新技術(shù)產(chǎn)業(yè)導(dǎo)報(bào);2003年

6 ;歐航局：精確“室內(nèi)導(dǎo)航”系統(tǒng)[N];人民公安報(bào);2010年

7 小靖;應(yīng)用廣泛的衛(wèi)星導(dǎo)航系統(tǒng)[N];中國測繪報(bào);2003年

8 袁澤慶;燒錢的衛(wèi)星導(dǎo)航系統(tǒng)[N];人民日報(bào)海外版;2011年

9 王定;印度“區(qū)域衛(wèi)星導(dǎo)航系統(tǒng)”正式上路[N];工人日報(bào);2013年

10 通訊員　 劉珂;中國衛(wèi)星導(dǎo)航系統(tǒng)應(yīng)用論壇在長舉行[N];湖南日報(bào);2006年

相關(guān)博士學(xué)位論文 前6條

1 焦文海;衛(wèi)星導(dǎo)航系統(tǒng)坐標(biāo)基準(zhǔn)建立問題的研究[D];中國科學(xué)院研究生院（上海天文臺）;2003年

2 張琳;衛(wèi)星導(dǎo)航系統(tǒng)接收機(jī)抗干擾關(guān)鍵技術(shù)研究[D];哈爾濱工業(yè)大學(xué);2007年

3 劉小匯;衛(wèi)星導(dǎo)航系統(tǒng)星載擴(kuò)頻接收機(jī)關(guān)鍵技術(shù)研究[D];國防科學(xué)技術(shù)大學(xué);2013年

4 崔s，

本文編號：2282914