查询词典 DOA

A new approach was proposed for the DOA joint estimation of signal, and the algorithms are based on ESPRIT and two or more array data correlation matrix.

提出一种基于双／多基地方位联合估计的新算法，利用两个阵列或多个阵列的接收数据的相关矩阵，再结合ESPRIT算法估计方位。

Third, the discussion of the corresponding relationship of the real angles to the apparent real angles is performed, the asymptotic bias and MSE of real angles are given. Fourth, based on above conclusions, the analysis of two typical cases is made by numerical analysis and computer simulation: Case A when the impinging signals are divided into desired signals and interfering signals: it is shown that similar to Cyclic estimation of DOA, the smaller the separation between interfering direction and signal direction, in general, the smaller the estimation variance.

首先，研究了无穷快拍时信号数目有误的最大似然估计，引入了视在真实角度的概念；其次，导出了视在真实角度最大似然估计大样本时的分布以及渐近均方误差的解析表达式，而且还证明了：Stoica性能分析结果是现在的分析结果在信号数目准确时的特例；第三，讨论了真实角度与视在真实角度的关系，给出了真实角度的渐近偏和渐近均方误差；第四，依据前面的结果，利用数值分析和模拟实验的方法对两种典型情况做了分析： 1 在入射信号被分为干扰信号和所需信号情况下：结果表明：与CyclicDOA估计一样，干扰方向与所需信号方向靠的越近，所需信号估计的方差越小，越远离，方差越大。

A new de-correlation DOA estimation algorithm based on cross correlation vector Toeplitz reconstruction is proposed.

针对相干信号源的波达方向角估计问题，提出了一种能有效解相干的互相关矢量Toeplitz算法。

A new method of DOA estimation is presented based on higher-order cumulant.

该文提出了一种基于高阶累积量虚拟阵列扩展的DOA估计新方法。

This present algorithm further distinguishes itself through sufficiently utilizes the advantage that the vector sensors provide from other beam space DOA algorithms in several regards: 1 beams are formed in the vector-field domain; 2 produce at moderate signal-to-noise ratio estimation performance comparable to the traditional scale array methods;3 these vector-field beams are formed blindly using no apriori source information and coarse estimates of the direction cosine are derived to start off MUSICs iterative search so it demand less computation; 4 deploy agilely , since the fact that the output channel is various .

本文提出了矢量传感器阵列的自适应综合校准补偿方法，还提出利用单矢量传感器速度协方差矩阵分解来求解目标源方位，使得我们不要求校准源是合作性的，也无需知道校准源的先验知识，这比起常规辅助源校准方法具备较大宽容性。随着高性能阵列处理技术及数字信号处理硬件的快速发展和矢量传感器制造工艺的不断成熟，矢量传感器将在新型水雷、低频远程智能鱼雷、声纳浮标、低频拖曳线列阵和新型舰壳声纳，灵巧传感终端，战场监视系统，反隐形雷达，通讯等军民用领域取得良好的发展应用前景。

At present, most of the DOA estimation algorithms are used in the Gaussian noise environment.

目前，大多数的DOA估计算法是应用在高斯噪声环境下的。

I came to find my brother. I have been told he died last year at DOA.

我是来找我哥哥的据说他在去年的DOA大赛中死了

FAX REP: Okay, I' ll see what I can doa

传真机代表：好的，我会看看我能做些什么。

Your job's a joke, you're broke, you're love life's DOA.

你的工作是个笑话，你破产了，你的感情生活宣告不治

I can have him removed from DOA island, or I can have some fun.

我可以把他赶出去的但是也可以留下他开开心

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。