【正文】 under low SNR. Key words: CS。 target detection。 low SNR。 multipulses accumulation 基于壓縮感知的雷達(dá)目標(biāo)檢測研究 VIII 南京航空航天大學(xué) 碩 士學(xué)位論文 IX 目 錄 第一章 緒論 .................................................................................................................... 1 研究背景和意義 .................................................................................................. 1 國內(nèi)外研究現(xiàn)狀 .................................................................................................. 3 壓縮感知理論及其發(fā)展 ............................................................................. 3 壓縮感知理論在雷達(dá)領(lǐng)域中的應(yīng)用 ............................................................ 4 本論文主要工作及內(nèi)容安排 ................................................................................ 6 第二章 壓縮感知及壓縮感知雷達(dá) .................................................................................... 8 引言 ................................................................................................................... 8 壓縮感知與傳統(tǒng)信號處理的區(qū)別 ......................................................................... 8 壓縮感知介紹 ..................................................................................................... 9 原始信號稀疏表示 .................................................................................... 9 測量矩陣設(shè)計 ..........................................................................................10 稀疏重構(gòu) .................................................................................................12 稀疏重構(gòu)算法 ....................................................................................................12 重構(gòu)原理 .................................................................................................12 幾種常用的重構(gòu)算法 ................................................................................13 壓縮感知雷達(dá) ....................................................................................................18 壓縮感知雷達(dá) ..........................................................................................18 壓縮感知雷達(dá)亟待解決問題 .....................................................................19 本章總結(jié) ...........................................................................................................20 第三章 CAMP 重構(gòu)算法及自適應(yīng) CAMP 算法 .................................................................21 引言 ..................................................................................................................21 CAMP 算法的提出 ..............................................................................................21 迭代閾值算法 ..........................................................................................21 消息傳遞算法 ..........................................................................................22 CAMP 算法及自適應(yīng) CAMP 算法 ........................................................................24 理想 CAMP 算法 ......................................................................................24 中值及自適應(yīng) CAMP 算法 ........................................................................28 實驗結(jié)果及分析 .................................................................................................30 基于壓縮感知的雷達(dá)目標(biāo)檢測研究 X 本章總結(jié) ...........................................................................................................34 第四章 基于壓縮感知的雷達(dá)目標(biāo)檢測方 法 .....................................................................35 引言 ..................................................................................................................35 傳統(tǒng)雷達(dá)目標(biāo)檢測 .............................................................................................35 傳統(tǒng)雷達(dá)目標(biāo)檢測原理 ............................................................................35 恒虛警率檢測方法 ...................................................................................36 壓縮感知雷達(dá)目標(biāo)檢測方案 ...............................................................................40 稀疏域信號檢測方案 ................................................................................41 非稀疏域信號檢測方案 ............................................................................42 步進(jìn)頻雷達(dá)信號模型 ..........................................................................................44 實驗結(jié)果及分析 .................................................................................................45 稀疏信號 .................................................................................................45 步進(jìn)頻信號 ..............................................................................................47 本章總結(jié) ............................................................................................................50 第五章 基于壓縮感知的雷達(dá)信號積累 ............................................................................51 引言 ..................................................................................................................51 傳統(tǒng)雷達(dá)脈沖積累 .............................................................................................51 基于壓縮感 知的脈沖積累重構(gòu) ............................................................................53 稀疏域積累 ..............................................................................................53 脈沖積累觀測矩陣 ...................................................................................54 實驗結(jié)果及性能分析 ................................................................................55 MMV 模型實現(xiàn)脈沖積累 ....................................................................................57 MMV 模型 ................................................................................................57 MMV 模型應(yīng)用于雷達(dá)脈沖積累 ................................................................58 實驗結(jié)果及分析 ........................................................................................59 本章總結(jié) ..................................................................................................