本文關(guān)鍵詞：北斗二號(hào)導(dǎo)航弱信號(hào)捕獲算法研究　出處：《重慶大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 北斗二號(hào) 弱信號(hào)捕獲 并行捕獲 比特符號(hào)翻轉(zhuǎn) 差分判決

【摘要】：全球衛(wèi)星導(dǎo)航技術(shù)（GNSS, Global Navigation Satellite System）由其應(yīng)用領(lǐng)域之廣泛，近些年來(lái)得到了快速的發(fā)展。我國(guó)自主研發(fā)搭建的北斗導(dǎo)航系統(tǒng)（BDS,Beidou System），更是由于其對(duì)我國(guó)國(guó)防事業(yè)的重要意義，受到了國(guó)內(nèi)外的廣泛關(guān)注和研究。2013年，中國(guó)衛(wèi)星導(dǎo)航系統(tǒng)管理辦公室對(duì)外公布了兩個(gè)民用信號(hào)規(guī)范文件，標(biāo)志著北斗二號(hào)導(dǎo)航系統(tǒng)（BD-2, Beidou-2System）將向民用領(lǐng)域進(jìn)軍。BD-2信號(hào)捕獲性能的好壞直接影響系統(tǒng)定位的性能，衛(wèi)星與用戶間通訊的導(dǎo)航信號(hào)在傳輸過(guò)程中受多徑衰落、陰影效應(yīng)、噪聲的影響，導(dǎo)致處于室內(nèi)、建筑群、隧道等復(fù)雜環(huán)境下的用戶捕獲信號(hào)困難，為適應(yīng)更為廣泛的用戶需求，研究具有更高靈敏度的BD-2導(dǎo)航信號(hào)的捕獲算法勢(shì)在必行。 論文圍繞BD-2導(dǎo)航弱信號(hào)捕獲算法展開(kāi)，主要研究?jī)?nèi)容如下： 首先，對(duì)BD-2B1I/B2I路信號(hào)進(jìn)行研究。給出BD-2B1I/B2I路信號(hào)的發(fā)射機(jī)結(jié)構(gòu)，介紹BD-2B1I/B2I路信號(hào)的特點(diǎn)以及其測(cè)距碼相關(guān)特性和頻譜特性，給出BD-2導(dǎo)航電文的兩種結(jié)構(gòu)及其調(diào)制方式，并建立BD-2B1I/B2I路數(shù)字信號(hào)模型。 其次，研究BD-2信號(hào)捕獲算法的基本理論。給出BD-2接收機(jī)的結(jié)構(gòu)，介紹常用的偽碼捕獲方法，，分析BD-2信號(hào)捕獲的要素和捕獲流程，完成基本的基于FFT時(shí)域并行捕獲算法的仿真實(shí)驗(yàn)和性能分析，同時(shí)介紹了BD-2信號(hào)捕獲算法的性能指標(biāo)。 接著，提出四類BD-2弱信號(hào)并行捕獲算法。介紹影響導(dǎo)航信號(hào)傳播的主要因素，分別提出相干累積并行捕獲算法、相干—非相干累積并行捕獲算法、相干—差分相干累積并行捕獲算法以及克服導(dǎo)航數(shù)據(jù)比特翻轉(zhuǎn)影響的最優(yōu)半比特相干—非相干累積并行捕獲算法，對(duì)各算法的原理和實(shí)現(xiàn)步驟進(jìn)行詳細(xì)的介紹，通過(guò)對(duì)各類算法的仿真實(shí)驗(yàn)得到各自的性能分析，并對(duì)這幾類算法的捕獲性能進(jìn)行對(duì)比。 最后，提出了一種基于差分判決的BD-2弱信號(hào)長(zhǎng)比特相干捕獲算法。介紹了算法的原理、實(shí)現(xiàn)流程、差分判決及相干累積過(guò)程。通過(guò)仿真實(shí)驗(yàn)和性能分析，將所提算法與一般的BD-2弱信號(hào)并行捕獲算法進(jìn)行對(duì)比，得出所提算法性能的優(yōu)越性，最后總結(jié)出所提算法在弱信號(hào)捕獲過(guò)程中的優(yōu)勢(shì)。
[Abstract]:Global Navigation Satellite System ( GNSS ) has been developed rapidly in recent years due to its wide application field . The Beier Navigation System ( BDS ) , which has been built by our country ' s independent research and development , has received extensive attention and research at home and abroad . In this paper , a weak signal acquisition algorithm based on BD - 2 navigation is developed . The main research contents are as follows : Firstly , the BD - 2B11 / B2I path signal is studied . The transmitter structure of BD - 2B11 / B2I path signal is given . The characteristics of BD - 2B11 / B2I path signal and its correlation characteristics and frequency spectrum characteristics are introduced . Two kinds of structure and modulation methods of BD - 2 navigation message are given , and a BD - 2B11 / B2I path digital signal model is established . Secondly , the basic theory of BD - 2 signal capture algorithm is studied . The structure of BD - 2 receiver is given , the common pseudo code acquisition method is introduced , the element and capture process of BD - 2 signal acquisition are analyzed , the simulation experiment and performance analysis of the basic FFT time domain parallel capture algorithm are completed , and the performance index of BD - 2 signal acquisition algorithm is also introduced . Next , four kinds of BD - 2 weak signal parallel capture algorithms are presented . The main factors that affect the propagation of navigation signals are introduced . The coherent accumulation parallel capture algorithm , the coherent - incoherent cumulative parallel capture algorithm , the coherent - differential coherent accumulation parallel capture algorithm and the optimal half - bit coherent - incoherent cumulative parallel capture algorithm that overcome the influence of the inversion of the navigation data bits are presented . The principle and realization steps of each algorithm are described in detail , and the performance analysis of each algorithm is obtained , and the capture performance of these algorithms is compared . Finally , a BD - 2 weak signal long - bit coherent acquisition algorithm based on differential decision is presented . The principle of the algorithm , the realization process , the difference judgement and the coherent accumulation process are introduced . Through the simulation experiment and the performance analysis , the proposed algorithm is compared with the general BD - 2 weak signal parallel capture algorithm , and the superiority of the proposed algorithm is obtained . Finally , the advantages of the proposed algorithm in the process of weak signal acquisition are summarized .

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN96.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 楊元喜;;北斗衛(wèi)星導(dǎo)航系統(tǒng)的進(jìn)展、貢獻(xiàn)與挑戰(zhàn)[J];測(cè)繪學(xué)報(bào);2010年01期

2 呂偉;朱建軍;;北斗衛(wèi)星導(dǎo)航系統(tǒng)發(fā)展綜述[J];地礦測(cè)繪;2007年03期

3 馮來(lái)平;張洪;賈小林;吳顯兵;;IRNSS區(qū)域衛(wèi)星導(dǎo)航系統(tǒng)服務(wù)性能分析[J];大地測(cè)量與地球動(dòng)力學(xué);2010年04期

4 覃新賢;謝應(yīng)科;韓承德;;GPS微弱信號(hào)C/A碼捕獲的最佳路徑搜索算法[J];計(jì)算機(jī)研究與發(fā)展;2008年08期

5 胡輝;袁媛;路春;;GPS信號(hào)差分相干累積捕獲技術(shù)[J];哈爾濱理工大學(xué)學(xué)報(bào);2012年06期

6 吳皓威;劉遠(yuǎn);楊力生;李恩玉;;基于差分判決的GPS弱信號(hào)長(zhǎng)比特相干捕獲算法[J];華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年07期

7 黃勁松;劉峻寧;劉成寶;田輝;;GPS信號(hào)載噪比研究[J];武漢大學(xué)學(xué)報(bào)(信息科學(xué)版);2007年05期

8 莫建文;歐陽(yáng)繕;肖海林;孫希延;;基于DBZP差分相干的GPS信號(hào)捕獲算法[J];系統(tǒng)工程與電子技術(shù);2012年06期

9 譚述森;;北斗衛(wèi)星導(dǎo)航系統(tǒng)的發(fā)展與思考[J];宇航學(xué)報(bào);2008年02期

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