数字波束形成-DBF
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目录
3.4 仿真结果 .......................................................................................................... 21 3.4.1 mmse 准则下的仿真 ............................................................................... 21 3.4.2 MSNR 准则下的仿真.............................................................................. 22 3.4.3 LCMV 准则下的仿真.............................................................................. 22
第 2 章 DBF 原理及应用 .............................................. 5 2.1 窄带信号模型 ..................................................................................................... 5 2.2 空间匹配滤波器 ................................................................................................ 7 2.3 阵列方向图 ........................................................................................................ 7 2.4 阵列增益 .......................................................................................................... 10 2.5 波束宽度 .......................................................................................................... 11 2.6 相位扫描的带宽限制 ...................................................................................... 11 2.7 智能天线 .......................................................................................................... 12 2.7.1 天线结构 ................................................................................................. 12 2.7.2 实现原理 ................................................................................................. 12 2.7.3 技术分类 ................................................................................................. 13 2.7.4 应用领域 ................................................................................................. 14 2.8 本章小结 .......................................................................................................... 15
摘要
GB8878185555334563BT9125XW
创作编号： 创作者： 凤呜大王*
摘要
随着高速、超高速信号采集、传输及处理技术的发展,数字阵列雷达已 成为当代雷达技术发展的一个重要趋势。数字波束形成(DBF)技术采用先进 的数字信号处理技术对阵列天线接收到的信号进行处理,能够极大地提高雷 达系统的抗干扰能力,是新一代军用雷达提高目标检测性能的关键技术之 一。并且是无线通信智能天线中的核心技术。
第 3 章 最优波束形成准则 ........................................... 16 3.1 最小均方误差准则 .......................................................................................... 16 3.2 最大信噪比准则 .............................................................................................. 18 3.3 线性约束最小方差（LCMV）准则 .............................................................. 20
本文介绍了数字波束形成技术的原理，对波束形成的信号模型进行了 详细的推导，并且用 matlab 仿真了三种计算准则下的数字波束形成算法， 理论分析和仿真结果表明以上三种算法都可以实现波束形成，并对三种算 法进行了比较。同时研究了窄带信号的自适应波束形成的经典算法。研究 并仿真了基于最小均方误差准则的 LMS 算法、RLS 算法和 MVDR 自适应 算法，并且做了一些比较。
关键词：数字波束形成、自适应波束形成、智能天线、最小均方误差、最 大信噪比、最小方差
I
ABSTRACT
ABSTRACT
With the development of high-speed, ultra high-speed signal acquisition, transmission and processing technology, digital array radar has became an important trend in the development of modern radar technology. Digital beamforming (DBF) technology uses advanced digital signal processing technology to process the signal received by antenna array. It can improve the anti-jamming ability of radar system greatly and it is one of the key technology。 It is the core of the smart antenna technology in wireless communication too。
第 4 章 自适应波束形成算法 ......................................... 25 4.1 经典自适应波束形成算法 .............................................................................. 25 4.2 最小均方(LMS)算法 ....................................................................................... 26 4.3 递归最小二乘（RLS）算法........................................................................... 27 4.4 最小方差无畸变响应(MVDR) ....................................................................... 28 4.5 经典自适应算法的仿真 .................................................................................. 30 4.5.1 LMS 算法的仿真 ..................................................................................... 30 4.5.2 RLS 算法仿真.......................................................................................... 31 4.5.3 MVDR 算法仿真 ..................................................................................... 33 4.5.4 三种算法比较 ......................................................................................... 34 4.6 本章总结 ........................................................................................................... 35
3.5 三种准则的对比 .............................................................................................. 23 3.6 本章总结 ........................................................................................................... 24
Key Words:DBF, ADBF, Smart antenna, The minimum mean square error, The maximum signal to noise ratio
II
目录
目录
第 1 章 绪论 ........................................................ 1 1.1 背景介绍 ............................................................................................................. 1 1.1.1 数字波束形成在国内外的发展及现状 ................................................... 1 1.1.2 展望 ........................................................................................................... 3 1.2 论文内容 ............................................................................................................ 4
This paper introduces the principle of digital beam forming technology, the signal model of beam forming was presented, And the digital beam forming algorithm under the three calculation criterion was simulated by MATLAB, theoretical analysis and simulation results show that the three algorithms can achieve beamforming, and made some comparison between the three algorithms. At the same time, made some study about the adaptive narrow-band signal beam forming algorithm. Learned and Simulateded the LMS algorithm base on minimum mean square error criterion and RLS algorithm and MVDR algorithm, and do some comparison
目录
3.4 仿真结果 .......................................................................................................... 21 3.4.1 mmse 准则下的仿真 ............................................................................... 21 3.4.2 MSNR 准则下的仿真.............................................................................. 22 3.4.3 LCMV 准则下的仿真.............................................................................. 22
第 2 章 DBF 原理及应用 .............................................. 5 2.1 窄带信号模型 ..................................................................................................... 5 2.2 空间匹配滤波器 ................................................................................................ 7 2.3 阵列方向图 ........................................................................................................ 7 2.4 阵列增益 .......................................................................................................... 10 2.5 波束宽度 .......................................................................................................... 11 2.6 相位扫描的带宽限制 ...................................................................................... 11 2.7 智能天线 .......................................................................................................... 12 2.7.1 天线结构 ................................................................................................. 12 2.7.2 实现原理 ................................................................................................. 12 2.7.3 技术分类 ................................................................................................. 13 2.7.4 应用领域 ................................................................................................. 14 2.8 本章小结 .......................................................................................................... 15
摘要
GB8878185555334563BT9125XW
创作编号： 创作者： 凤呜大王*
摘要
随着高速、超高速信号采集、传输及处理技术的发展,数字阵列雷达已 成为当代雷达技术发展的一个重要趋势。数字波束形成(DBF)技术采用先进 的数字信号处理技术对阵列天线接收到的信号进行处理,能够极大地提高雷 达系统的抗干扰能力,是新一代军用雷达提高目标检测性能的关键技术之 一。并且是无线通信智能天线中的核心技术。
第 3 章 最优波束形成准则 ........................................... 16 3.1 最小均方误差准则 .......................................................................................... 16 3.2 最大信噪比准则 .............................................................................................. 18 3.3 线性约束最小方差（LCMV）准则 .............................................................. 20
本文介绍了数字波束形成技术的原理，对波束形成的信号模型进行了 详细的推导，并且用 matlab 仿真了三种计算准则下的数字波束形成算法， 理论分析和仿真结果表明以上三种算法都可以实现波束形成，并对三种算 法进行了比较。同时研究了窄带信号的自适应波束形成的经典算法。研究 并仿真了基于最小均方误差准则的 LMS 算法、RLS 算法和 MVDR 自适应 算法，并且做了一些比较。
关键词：数字波束形成、自适应波束形成、智能天线、最小均方误差、最 大信噪比、最小方差
I
ABSTRACT
ABSTRACT
With the development of high-speed, ultra high-speed signal acquisition, transmission and processing technology, digital array radar has became an important trend in the development of modern radar technology. Digital beamforming (DBF) technology uses advanced digital signal processing technology to process the signal received by antenna array. It can improve the anti-jamming ability of radar system greatly and it is one of the key technology。 It is the core of the smart antenna technology in wireless communication too。
第 4 章 自适应波束形成算法 ......................................... 25 4.1 经典自适应波束形成算法 .............................................................................. 25 4.2 最小均方(LMS)算法 ....................................................................................... 26 4.3 递归最小二乘（RLS）算法........................................................................... 27 4.4 最小方差无畸变响应(MVDR) ....................................................................... 28 4.5 经典自适应算法的仿真 .................................................................................. 30 4.5.1 LMS 算法的仿真 ..................................................................................... 30 4.5.2 RLS 算法仿真.......................................................................................... 31 4.5.3 MVDR 算法仿真 ..................................................................................... 33 4.5.4 三种算法比较 ......................................................................................... 34 4.6 本章总结 ........................................................................................................... 35
3.5 三种准则的对比 .............................................................................................. 23 3.6 本章总结 ........................................................................................................... 24
Key Words:DBF, ADBF, Smart antenna, The minimum mean square error, The maximum signal to noise ratio
II
目录
目录
第 1 章 绪论 ........................................................ 1 1.1 背景介绍 ............................................................................................................. 1 1.1.1 数字波束形成在国内外的发展及现状 ................................................... 1 1.1.2 展望 ........................................................................................................... 3 1.2 论文内容 ............................................................................................................ 4
This paper introduces the principle of digital beam forming technology, the signal model of beam forming was presented, And the digital beam forming algorithm under the three calculation criterion was simulated by MATLAB, theoretical analysis and simulation results show that the three algorithms can achieve beamforming, and made some comparison between the three algorithms. At the same time, made some study about the adaptive narrow-band signal beam forming algorithm. Learned and Simulateded the LMS algorithm base on minimum mean square error criterion and RLS algorithm and MVDR algorithm, and do some comparison