ID 原文 译文
53527 信道的时变性会带来子载波间干扰（ICI），降低信道估计算法的精度。 The accuracy of channel estimation would be degraded by intercarrier interference (ICI) caused by time-varying character.
53528 针对信道的快时变性，提出一种基于特征值分解的时变信道估计方法，同时设计一种新的导频结构。 For time-varying channels, a new channel estimation method based on eigenvalue decomposition was proposed, and a new pilot pattern was also designed.
53529 该方法利用信道矩阵时域及频域相关性，将信道频域矩阵表示为其特征向量的线性加权，并用贝叶斯模型估计加权系数。 By exploiting the time and frequency correlations of channel taps, the frequency-domain channel matrix can be decomposed by a sum of its eigenvector, then the coefficients were estimated by using a Bayesian model.
53530 仿真结果表明，所提方法能有效降低 ICI 对系统性能的影响，可较好地满足快时变信道环境的要求。 Simulation results demonstrate the effectiveness of the proposed channel estimation method in rapidly time-varying scenarios against ICI.
53531 本文通过求解融入纹理特征信息的对称、半正定线性方程组，提出一种新的基于随机游走（Random Walker）的纹理图像分割算法。 In this paper, we propose a new random walker model for texture image segmentation through solving a symmetric, semi-positive-definite system of linear equations equipped with the texture information.
53532 为了构造该方程组，首先通过局部二元模式（Local binary pattern，简称LBP）算子来描述纹理，将图像映射至不同纹理之间有显著区别的LBP图（LBP map）上， In the construction of the equations, we perform the feature extraction based on Local Binary Pattern (LBP) and map the original image into the space where textures are distinguished from each other (called as LBP map).
53533 进而将其与梯度和几何信息结合并构造倒数型像素相似度，形成方程所需的权值矩阵，在随机游走模型下使已标号区域向未知区域传递，从而实现纹理图像分割。 The similarity between the pixels is then constructed by combining the LBP, gradient and geometric feature in a reciprocal fashion. These similarities are formed as the edge weights of the graph, which helps the labels of the seeds propagate into the unlabeled regions during the random walker process.
53534 最后以纹理图像、噪声合成图像、MRI、CT图像为实验对象来验证算法的有效性。定性及定量实验结果表明，在多目标分割任务下，本方法有更好的有效性和精确性。 Experiments on the texture images, synthetic noise images and medical images shows that the proposed segmentation method extends the state-of-art random walker segmentation to texture images successfully and outperforms some other texture segmentation algorithms particularly on multi-label problem based on the qualitative and quantitative results.
53535 论文建立了并行机载斜视双站 SAR 的结构模型和信号模型，用收发载机多普勒贡献比为加权系数推导了点目标回波的扩展 Loffeld 频谱公式（ELBF）。 Based on the geometrical model and signal model of parallel airborne bistatic squint SAR(Bi-SAR), extended Loffeld bistatic formula (ELBF) of point target echo is derived by using the weighting factors that is defined by the Doppler contribution ratios of the transmitter and receiver.
53536 在二维频域内补偿双站扭曲项，然后对剩余相位项做 Taylor 展开，利用Chirp Scaling（CS）方法，推导了并行机载双站斜视 SAR 的 ELBF-CS 成像算法。 Bistatic deformation is compensated in the two-dimensional (2-D) frequency domain, residual phase items in spectrum expressions are expanded using Taylor series expansion, and the ELBF-CS imaging algorithm of parallel airborne bistatic squint SAR is deduced combining with the CS theory.