盲波束形成
盲波束形成的相关文献在1997年到2019年内共计89篇,主要集中在无线电电子学、电信技术、一般工业技术、自动化技术、计算机技术
等领域,其中期刊论文72篇、会议论文13篇、专利文献128727篇;相关期刊40种,包括东北大学学报(自然科学版)、系统工程与电子技术、信息工程大学学报等;
相关会议11种,包括2008年全国声学学术会议、第二届全国信号处理与应用学术会议、第五届全国信息获取与处理学术会议等;盲波束形成的相关文献由169位作者贡献,包括李洪升、吴瑛、王峰等。
盲波束形成—发文量
专利文献>
论文:128727篇
占比:99.93%
总计:128812篇
盲波束形成
-研究学者
- 李洪升
- 吴瑛
- 王峰
- 赵俊渭
- 马晓川
- 何振亚
- 郭艳
- 陈华伟
- 陈宇欣
- 侯朝焕
- 刘成城
- 方大纲
- 汪晋宽
- 沈怡平
- 赵拥军
- 倪晋平
- 唐玲
- 孙超
- 梁昌洪
- 薛延波
- 郝程鹏
- 陈模江
- 马远良
- 何宏
- 刘亚奇
- 刘志刚
- 刘福来
- 吕英华
- 常青
- 廖桂生
- 张临祥
- 张志宏
- 张莉
- 徐晓宁
- 李宁
- 李志舜
- 李显旭
- 李涛
- 杨日杰
- 梁亚萍
- 梁红
- 王建英
- 王惠刚
- 王昊
- 王登伟
- 田丹
- 章新华
- 范志攀
- 郭业才
- 陈沛
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刘骐玮;
马彦恒;
李根;
董健
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摘要:
针对现有的卷积盲源分离方法(如时频分析方法)在宽带信号的分析中计算量较大的问题,提出一种在分数阶傅里叶域滤波基础上的盲波束形成算法.算法首先对接收到的信号作分数阶傅里叶域的峰值滤波,然后计算空时频输出矩阵,最后提出一种信号来向未知的空间盲波束形成算法.该算法充分利用线性调频信号在分数阶傅里叶域能量聚集的特性提高输出信噪比,并减少了运算量.仿真结果表明,算法能够实现宽带信号的盲源分离,且输出性能较之时频方法有一定提高.
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WANG Lei;
LI Guangxue;
LI Dongxia;
LIU Haitao
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摘要:
由于L频段数字航空通信系统1(L-band digital aeronautical communication system1,L-DACS1)和民航测距机(distance measuring equipment,DME)系统的频谱有部分重叠,因此在L-DACS1接收机中需要考虑DME干扰的抑制问题.提出了基于最大输出信噪比的干扰抑制和盲波束形成算法.由于DME脉冲干扰的功率较大,首先采用子空间跟踪算法来得到干扰子空间,然后将接收数据向干扰子空间的正交补空间进行投影以抑制DME干扰.干扰抑制后,接收数据中只剩下正交频分复用(orthogonal frequency division multiplexing,OFDM)信号和噪声了.为了充分利用阵列天线的优势,采用了输出信噪比最大准则来进行波束形成,将天线方向图的主瓣对准OFDM信号来向,以提高接收机输出信号的信噪比.仿真表明,该方法不需要先验信息就能够在抑制干扰的同时进行盲波束形成,在OFDM信号来向上获得高增益的主瓣,进而提高输出信噪比;另外,所提的波束形成方法在输入信噪比较低的环境下依然能够形成稳定的波束,将主瓣对准信号来向.
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陈沛;
赵拥军;
刘成城;
李海文
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摘要:
针对现有盲波束形成算法在脉冲噪声环境中性能的下降,提出一种基于分数低阶时频分解的盲波束形成算法.该算法首先将分数低阶统计量引入传统的短时傅里叶变换中,实现抑制脉冲噪声的时频分解.然后利用对各阵元的接收信号进行分数低阶时频分解的结果,结合聚类和不确定集方法,实现导向矢量的最优估计.最后利用最小方差无畸变响应算法获得最优权矢量,实现了高效的多目标盲波束形成.仿真实验结果表明,该算法在服从对称alpha稳定分布的脉冲噪声环境中,较现有盲波束形成算法的输出性能更优.该算法不依赖源信号自身特性,适用范围更广.%A novel blind beamforming algorithm based on fractional lower-order time-frequency decomposition(TFD)is proposed to improve the performance of existing blind beamforming algorithms in impulsive noise environment.The traditional short-time Fourier transform (STFT) is first improved by utilizing fractional lower-order statistics to realize TFD in impulsive noise environment. Then, by combining the clustering method and the method for the uncertainty set,the TFD results of the receiving data at each sensor are used to realize the estimation of steering vectors (SV).Finally,the optimal weight coefficients of the proposed blind beamformer are achieved by substituting the estimated SV into the minimum variance distortionless response (MVDR) beamformer.Simulation results demonstrate that this algorithm can achieve superior output performance over the existing blind beamforming methods in impulsive noise environment.The proposed algorithm hardly needs any specific property of the receiving signals and can be more widely used.
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陈沛;
赵拥军;
刘成城
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摘要:
A novel blind beamforming algorithm based on sparse Time-Frequency Decomposition (TFD) is proposed to solve the problems of existing blind beamforming algorithms: poor universality and the requirement of large amount of sampling data. In the proposed algorithm, the traditional Short-Time Fourier Transform (STFT) is first formulated as a sparse reconstruction problem. Then, a fast and efficient algorithm based on the alternating split Bregman technique is utilized to carry out the optimization. By combining the clustering and uncertainty set methods, the sparse-TFD results of the receiving data at each sensor are used to realize the estimation of Steering Vectors (SV). Finally, the optimal weight coefficients are achieved by substituting the estimated SV into the MVDR beamformer. The proposed algorithm hardly needs any specific statistical property of the receiving signals. Simulation results demonstrate that this algorithm can achieve superior output performance over the existing blind beamforming methods. It needs few snapshots with lower computational cost and has fast convergence rate, which makes the algorithm easy to utilize in practical applications.%针对现有盲波束形成算法通用性差,所需采样数据量大等问题,该文提出一种基于稀疏时频分解的盲波束形成算法。算法首先将传统的短时傅里叶变换转化为稀疏重构问题,利用交替分裂Bregman算法进行迭代求解。然后利用对各阵元的接收信号进行稀疏时频分解的结果,结合聚类和不确定集方法,实现导向矢量的最优估计。最后利用MVDR算法获得最优权矢量。该算法无需利用信号统计特性,实现了高效的盲波束形成。仿真实验结果表明,该算法所需数据量小,迭代步骤易于工程实现,较现有盲波束形成算法输出性能更优,适用范围更广。
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钱华明;
刘可;
马俊达
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摘要:
针对均匀线阵,利用信号的恒模特性,与容积卡尔曼滤波相结合,提出一种新的盲自适应波束形成算法。通过对恒模算法的优化代价函数进行变换,使其满足系统状态空间模型。利用容积卡尔曼滤波算法进行自适应滤波,以实现抑制干扰和消除噪声。所提算法对状态空间模型中的系统噪声和过程噪声进行了自适应处理,免除滤波噪声参数的设置,增强了算法的通用性,并引入了收敛因子,加速系统的收敛速度。仿真结果表明了该算法的正确性和有效性。%A novel blind adaptive beamforming algorithm is proposed based on uniform linear array using constant modulus feature and cubature Kalman filter (CKF).This algorithm transforms the cost function of the constant modulus algorithm (CMA)to a state space model,and cancels noise and suppresses interference using the CKF.System noise and measurement noise are processed adaptively without setting noise parameters,thus being applied to applications conveniently.A convergence factor is introduced to speed up the convergence of systems.Simulation results demonstrate its correctness and effectiveness.
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易善超;
吴瑛;
唐涛;
王云龙
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摘要:
传统的恒模波束形成算法在期望信号的信噪比较低的情况下容易误收敛到干扰信号,导致波束形成算法失效.针对上述问题,本文提出了一种共轭对称约束差分恒模算法.该算法首先引入了一种新的差分恒模代价函数,然后根据均匀直线阵列导向矢量的特殊结构,推导出了共轭对称约束条件.最后通过对数据进行归—化处理,使得步长因子的选择独立于输入信号功率,降低了步长因子的选取难度,提高了算法的实用性.仿真实验表明,本文算法在低信噪比下仍然保持了良好的收敛性能,并且对阵列幅相误差和初始权重矢量的误差也具有较强的稳健性.
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刘亚奇;
赵拥军;
刘成城
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摘要:
针对传统盲源分离算法对宽带阵列信号适用性较差的问题,提出一种基于时频分析的宽带恒定束宽盲波束形成算法。该算法首先将接收信号变换到时频域上并提取出单源点。然后,对单源点聚类并求解信号在不同频点上的导向矢量。最后,通过提出一种信号来向未知的空间响应变化约束方法,实现宽带恒定束宽盲波束形成。该算法避免了将宽带盲波束形成转换为卷积混合的盲源分离,因而不存在时域盲源分离算法中系统参数随滤波器阶数急剧增加的问题,也不存在频域算法中排序和幅度模糊的问题。仿真结果表明,算法能够较好地实现宽带信号的盲分离,且输出信干噪比高于时域、频域以及时频域盲源分离算法,实测数据的处理结果验证了该算法的实用性。%Conventional blind source separation algorithms have poor suitability for wideband array signals.To address the problem,a novel wideband constant beamwidth blind beamforming algorithm based on time-frequency analysis is proposed. The received array signals are firstly transformed into time-frequency domain,and the single-source points are extracted. Then,the single-source points are clustered into different classes,which are used to obtain the signal steering vector at dif-ferent frequencies.Finally,the wideband constant beamwidth blind beamforming is achieved by a spatial response variation constraint method without knowledge of the direction of arrival (DOA).The transformation from wideband blind beamform-ing to the blind separation of convolution mixtures is avoided in the proposed algorithm.Thus,the system parameters of time-domain algorithms will not increase sharply with the length of filter order,and the arbitrary permutation and scaling ambiguity of frequency-domain algorithms are also eliminated.The simulations illustrate that the proposed algorithm can well separate the wideband signals and achieve a higher output signal to interference plus noise ratio (SINR)compared with the time-domain,frequency-domain and time-frequency-domain algorithms.The practicality of the proposed algorithm is demonstrated by the measured data.
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刘亚奇;
刘成城;
赵拥军;
朱健东
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摘要:
The existing blind beamforming methods are effective only under the condition that the source signals have some special statistical or structural characteristics. Additionally, the structure of cascade model is complicated and the stability of parallel model is poor when dealing with multi-target signals. To address these problems, a novel blind beamforming algorithm for multi-target signals based on time-frequency (TF) analysis is proposed in this paper. The received array signals are first transformed into time-frequency domain by using quadratic time-frequency distributions (TFDs). Then, the single-source auto-term TF points which show energy concentration at a single signal are extracted through three operations: (i) removing noise points by setting a reasonable threshold, (ii) separating auto-term TF points from cross-term points, and (iii) selecting the single-source auto-term TF points from the auto-term ones. Moreover, these single-source auto-term TF points are classified by the principal eigenvector of their spatial time-frequency distribution matrixes. For each class of TF points, the uncertain set of signal steering vector is given, whose radius is defined as the ultimate range between the center and the elements in the class. Within the uncertain set, an optimization algorithm is provided to get the optimal estimation of the signal steering vector. Finally, the blind beamforming for multi-target signals is achieved based on the Capon method, which can enhance the desired signals and suppress the noise and interference signals. In addition, the influence of parameters selection, the clustering method of unknown source number, and the computational complexity of the proposed algorithm are analyzed. The proposed algorithm can achieve parallel output of multi-target signals under the condition that the array manifold and the direction of arrival (DOA) are unknown. Also, the complex iterative solving processing may be avoided and special limitations on signal characteristics are unnecessary. As a result, it has wide applicability and superior stability compared with the existing blind beamforming methods. Simulations illustrate that the proposed algorithm can well separate multi-target signals which are TF-nondisjoint to a certain extent. It can achieve a higher output signal to interference plus noise ratio (SINR) compared with the constant modulus algorithm (CMA), the independent component analysis (ICA) algorithm, and the joint approximate diagolization of eigenmald (JADE) algorithm. Furthermore, the output performance of the proposed algorithm is close to the optimal Capon beamformer.%针对现有盲波束形成算法适用范围较窄,多目标信号分离级联模式结构复杂、并联模式稳定性较差等问题,提出一种基于时频分析的多目标盲波束形成算法。该算法首先利用时频分析技术给出信号导向矢量的不确定集,然后优化求解导向矢量的最优估计,最后利用Capon方法实现多目标信号的并行输出。理论分析及仿真结果表明,该算法对信号特性没有特殊要求,适用性较广,性能稳定,且输出信干噪比高于其他盲波束形成算法,接近于最优Capon波束形成器。
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刘红;
王永芳;
杜晓冬
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摘要:
In the field of adaptive array anti-jamming of satellite navigation,a blind adaptive beamforming algorithm based on orthogonal projection and cyclostationary can be used to avoid the error caused by prior information and antenna array. In this paper,CD-OCAB and DS-OCAB algorithms are analyzed for GPS signal. The estimation of the cyclic auto- correlation function of white noise is not zero due to the limited data length in CD-OCAB. Accordingly,the performance of cyclostationary method may be negatively affected. Fortunately,DS-OCAB can avoid it. Taking into account the complexity of the project,the receiving data is reduced. Simulation results demonstrate that the DS-OCAB algorithm can keep its performance and improve its robustness.%在卫星导航自适应阵列抗干扰中,为避免先验信息误差和阵列误差对自适应波束形成性能的影响,可采用基于正交投影和导航信号循环平稳特性的盲波束形成算法(OCAB)。针对GPS信号,采用周期延迟信号处理的OCAB算法(CD-OCAB)时,由于数据长度有限,噪声循环自相关函数估计量不为零,因此将影响循环平稳方法的性能,而采用解重扩数据辅助的OCAB算法(DS-OCAB)可以避免噪声估计误差的影响。将两种算法进行仿真比较,仿真结果表明,DS-OCAB算法可在少数据量的情况下保证算法性能不下降,提高算法的稳健性。
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蒋曦曦;
吴瑛;
尹洁昕
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摘要:
针对较大的导向矢量失配下波束形成算法性能下降的问题,有基于复数快速独立分量分离算法(cFastICA)的盲波束形成算法,但cFastICA算法存在信号分离次序不确定的问题。结合最差性能最优化(WCPO)稳健波束形成算法的优点,给出了一种联合的盲波束形成算法。该方法首先根据期望信号来向等先验信息估计其导向矢量,然后利用WCPO准则完成cFastICA算法权矢量的初始化。仿真实验表明,该算法有效保证了期望信号提取的确定性,对阵列误差模型具有较好的稳健性,且在强干扰下具有较好的合成性能。
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许策;
章新华;
郭徽东
- 《2005年全国水声学学术会议》
| 2005年
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摘要:
在拖曳声纳阵列的信号处理中,来自水面舰艇方向的噪声主要是机械和水力噪声,这些噪声往往影响了声纳的性能.当我们用Capon自适应波束形成器处理阵列数据时发现,水面舰艇的噪声在波束图上形成了大的旁瓣,掩盖了在这一方向上真实的目标.如何抑制拖曳舰船的干扰直接影响到拖曳声纳的探测能力,本文用一种盲波束形成的算法很好地达到了这一效果.仿真实验证明该算法的优越性.
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沈怡平;
中国科学院研究生院;
侯朝焕;
马晓川
- 《2005年全国水声学学术会议》
| 2005年
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摘要:
盲波束形成是一种在阵列信息未知的情况下对阵元接收的数据进行分析,从而得到源信号相关知识的阵列信号处理方法,Coviello提出了一种不同于最佳或自适应算法的简单盲波束形成算法,然而Coviello的算法基于均匀线性阵列,本文则用ESPRIT算法的思想对其进行扩展,并与传统ESPRIT算法进行比较,实验证明,改进后的算法具有更好的性能和更高的适用性.
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陈建云;
刘辉;
王跃科
- 《中国航空学会信号与信息处理专业全国第七届学术会议》
| 2003年
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摘要:
本文研究了自导声纳系统中的目标波达方向(Direction of Arrival,简称DOA)和多普勒频率的估计问题.在未精确已知阵列流形条件下,提出和实现了一种基于最小二乘法的阵列自适应盲波束形成算法,利用最小均方准则对阵列波束形成的权矢量进行盲估计并求解了信号的多普勒频率.
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王惠刚;
梁红;
李志舜
- 《第十一届全国信号处理学术年会》
| 2003年
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摘要:
本文系统介绍了在不同混合模型下的盲分离模糊性问题,并详细分析了消除模糊性的方法.指出可以通过施加一些约束条件或组合先验信息到算法中来消除盲分离的模糊性,重点介绍了约束最优化方法和组合先验信息的方法来解决盲分离的模糊性,针对具体的应用给出了几种常用的约束化条件.