ID 原文 译文
48876 为设计复杂多变环境下的多机种综合保障基地油料加注系统提供了参考。 For the design of more complex and changeful environment model integrated security base oil filling system provides the reference.
48877 目前,多接收阵合成孔径声纳快速成像算法一般都需要将各接收阵的回波融合成适于传统收发合置合成孔径声纳处理的数据,因此避免不了耗时的插值和空变的相位误差补偿。 At present, more quickly receive array synthetic aperture sonar imaging algorithms are generally need to each receiving array echo merge into suitable for traditional transceiver or synthetic aperture sonar processing of data and thus avoid the time-consuming interpolation and space-variant phase error compensation.
48878 根据多接收阵合成孔径声纳的实际模型,将各接收阵和发射阵作为一个子系统,并采用驻相原理将其二维频域点扩展函数表示为距离向空变项和非空变项的乘积。 More than receiving array synthetic aperture sonar based on the actual model, each receiving array and emission array as a subsystem, and adopting the principle of phase in the two-dimensional frequency domain point spread function is expressed as the distance variable into the air and the product of the variables is not empty.
48879 在此基础上,运用线频调变标成像算法先完成各子系统数据的成像,然后再实现各子图像的相干叠加,以获得所需的高分辨合成孔径声纳复图像。 On this basis, using the line frequency modulation to complete the imaging algorithm of each subsystem data imaging, and then to realize the coherent superposition of each sub image, in order to obtain the required high resolution synthetic aperture sonar image.
48880 最后,仿真实验和湖试结果验证了该方法的有效性。 Finally, the simulation and lake test results demonstrate the effectiveness of the proposed method.
48881 针对线性分组码参数盲识别容错性能较差,以及在低误比特率且同步情况下利用分析矩阵秩亏法识别存在码长不足的问题,提出了一种基于二元高斯列消元法的分组码参数盲识别方法。 For blind identification of linear block codes fault-tolerant performance is poorer, and under the condition of low bit error rate and synchronization by using analysis method of matrix rank deficient recognition has the problem of insufficient code length, this paper proposes a binary column gaussian elimination method based on block code parameter blind identification method.
48882 首先将截获到的数据横向放入到分析矩阵,然后对分析矩阵的列进行二元域高斯消元,并计算每列所含1的比率值,再对所有比率值求均值和方差,在低误比特率且同步的情况下利用均值差值可确定码长,而在误比特率较高且不同步的情况下,则需利用方差差值来确定码长。 First to intercept data horizontally into the analysis of the matrix, and then analysis the columns of the matrix for binary domain gaussian elimination, and calculate the ratio value of each column contains 1, again to all of the mean and variance ratio value, in the case of low bit error rate and synchronization using the average difference can determine yards long, and the bit error rate is higher and below are not synchronized, variance difference is used to determine yards long.
48883 理论分析和仿真表明:该方法与以往的矩阵模型识别方法相比,容错性能较好、计算量较低,且适用于各种码率的线性分组码的码长和同步识别。 Theoretical analysis and simulation show that this method is compared with the previous matrix model identification method, better fault-tolerant performance and lower computation, and is suitable for various bit rate of the code length and synchronization of the linear block code identification.
48884 自适应单脉冲方法是干扰背景下目标角度估计的一种有效方法。 Adaptive monopulse method is interference under the background of the target Angle estimation is an effective method.
48885 但对于主瓣内明显偏离波束中心的目标,或者在实际应用中由于天线往往采用子阵结构且存在误差,自适应单脉冲方法估计结果会出现较大的测角偏差。 But for the goal of significantly deviate from the beam center within the main lobe, or because the antenna is often used in practical application of submatrix structure and the error of adaptive monopulse method estimates there will be a larger angular deviation.