【正文】 ....................................................................4第 2 章 DOA 估計(jì)算法的理論基礎(chǔ) ...............................................................................6 DOA 估計(jì)算法的理想化條件 ................................................................................6 信號(hào)源的數(shù)學(xué)模型 .................................................................................................7 窄帶信號(hào)源的數(shù)學(xué)模型 .................................................................................7 相干信號(hào)源的數(shù)學(xué)模型 .................................................................................8 天線陣列的數(shù)學(xué)模型 .............................................................................................9 均勻線陣 .........................................................................................................9 均勻圓陣 .......................................................................................................10 DOA 估計(jì)技術(shù)的基本原理 ..................................................................................11 MUSIC 算法 ..........................................................................................................12 MUSIC 算法的基本原理 .............................................................................12 空間平滑算法的基本原理 ...........................................................................13 MUSIC 算法的仿真分析 .............................................................................15 本章小結(jié) ...............................................................................................................17第 3 章 最大似然估計(jì)類算法 .......................................................................................18 DEML 算法 ...........................................................................................................18 DEML 算法的原理 .......................................................................................18 仿真實(shí)驗(yàn)及分析 ...........................................................................................21 DEML 算法的特性優(yōu)勢(shì) ...............................................................................25 CDEML 算法 ........................................................................................................25 CDEML 算法的原理 .....................................................................................25 CDEML 算法的仿真分析 .............................................................................27哈爾濱工業(yè)大學(xué)工學(xué)碩士學(xué)位論文 IV WDEML 算法 .......................................................................................................28 WDEML 算法的原理 ....................................................................................28 WDEML 算法的仿真分析 ............................................................................29 參考信號(hào)先驗(yàn)信息對(duì)算法性能的影響 ...............................................................31 幅度差對(duì)算法性能影響的仿真分析 ...........................................................31 頻率差對(duì)算法性能影響的仿真分析 ...........................................................32 相位差對(duì)算法性能影響的仿真分析 ...........................................................33 本章小結(jié) ...............................................................................................................34第 4 章 基于迭代的已知信號(hào) DOA 估計(jì)算法 ............................................................35 MSWFMUSIC 算法 .............................................................................................35 多級(jí)維納濾波器的結(jié)構(gòu)及原理 ...................................................................35 MSWFMUSIC 算法的原理 ........................................................................36 MSWFMUSIC 算法的仿真分析 ................................................................38 線陣 PASI 算法 ....................................................................................................40 線陣 PASI 算法的基本原理 ........................................................................40 線陣 PASI 算法的仿真分析 ........................................................................42 本章小結(jié) ...............................................................................................................43第 5 章 基于陣列平移的圓陣 PASI 算法 ....................................................................44 信號(hào)模型 ...............................................................................................................44 適用于圓陣的基于信號(hào)先驗(yàn)信息的 DOA 估計(jì)算法 ........................................45 基于陣列平移的圓陣 PASI 算法的基本原理 ....................................................45 陣列平移構(gòu)造子陣的原理 ...........................................................................45 基于圓陣的 PASI 算法初次 DOA 估計(jì)的原理 ..........................................46 基于圓陣的 PASI 算法的迭代估計(jì)原理 ....................................................47 基于陣列平移的圓陣 PASI 算法的算法仿真 ....................................................48 單信源多徑信號(hào)的測(cè)角仿真 .......................................................................48 存在多個(gè)多徑的多個(gè)信源測(cè)角仿真 ...........................................................50 基于陣列平移的圓陣 PASI 算法的性能仿真 ....................................................51 陣列半徑與陣元數(shù)對(duì) PASI 算法性能的影響 ............................................52 信噪比與快拍數(shù)對(duì) PASI 算法性能的影響 ................................................52 迭代次數(shù)對(duì) PASI 算法性能的影響 ............................................................53 本章小結(jié) ...............................................................................................................53結(jié) 論 .............................................................................................................................55哈爾濱工業(yè)大學(xué)工學(xué)碩士學(xué)位論文 V 參考文獻(xiàn) .........................................................................................................................57攻讀碩士學(xué)位期間發(fā)表的論文及其它成果 .................................................................62哈爾濱工業(yè)大學(xué)學(xué)位論文原創(chuàng)性聲明和使用權(quán)限 .....................................................63致 謝 .............................................................................................................................64哈爾濱工業(yè)大學(xué)工學(xué)碩士學(xué)位論文 1 第 1 章 緒 論 課題背景及研究的目的和意義隨著現(xiàn)代通信技術(shù)和信