ID 原文 译文
23865 该文针对稀疏表示应用于单通道盲源分离中存在字典间互干扰的问题，通过在常规联合字典中引入一个新的子字典   “共同子字典”，提出一种新的基于稀疏表示的单通道盲源分离算法。 The main drawback of sparse representation based Single Channel Blind Source Separation (SCBSS) is the interference between sub-dictionaries. To alleviate this drawback, an extra sub-dictionary, named common sub-dictionary, is proposed to add into traditional union dictionary.
23866 新的字典学习目标函数中单个源的保真度由对应子字典和共同子字典构成，共同子字典的存在可以有效避免某一源信号在其他子字典上寻求成份而带来的互干扰问题。 The single source is reconstructed by linear combining sparsely activity atoms of its corresponding sub-dictionary and common sub-dictionary. The common sub-dictionary can pure discriminative information in each source's specified sub-dictionary since the common information different sources shared together is gathered in common sub-dictionary.
23867 目标函数的求解通过交替执行稀疏表示、字典更新和比例系数优化 3 个步骤来实现。 The optimization of objective function involves three steps: sparse representation, dictionary updating and weight coefficients optimization, and the three steps are iteratively performed for a specified number of times or until convergence.
23868 在测试阶段，通过收集单个源所对应子字典和共同子字典上的分量可以估计出混合信号中的单个源信号，从而达到盲源分离的目的。 In test stage, single source separation is achieved by combining atoms in source corresponding sub-dictionary and common sub-dictionary with the sparse coefficients of single mixed signal over union dictionary.
23869 在语音数据库上进行的对比实验发现，所提算法较传统算法和前沿算法在两个通用评价指标上最高有近 1 dB 的提高。 Experimental results on speech dataset show that, when compared with traditional and state of art algorithms, the proposed algorithm can improve the performance 1 dB at most.
23870 参考信号的稳健重构是数字波形外辐射源雷达的关键技术之一，其中信道估计的精度直接关系到重构参考信号的纯度。 The steady reference signal reconstruction is one of the key technologies of passive radar with digital waveform, and the accuracy of channel estimation is directly related to the reference signal purity.
23871 针对数字地面多媒体广播(DTMB)外辐射源雷达在接收系统基带采样率是信号符号速率非整数倍时所面临的参考信号重构质量问题，该文在压缩感知的匹配追踪算法基础上，提出一种改进的信道估计新算法。 To deal with the problem of reference signal reconstruction for Digital Terrestrial Multimedia Broadcasting (DTMB) based passive radar when the receiving system samples at a non-integer multiples of the symbol rate, an improved channel estimation is proposed on the basis of matching pursuit algorithm which is based on the compression perception.
23872 仿真分析表明，相比于广泛采用的时域相关法和最小二乘(LS)算法，改进后的算法有更好的频率适应性，鲁棒性高，在多种信道环境下表现优越。 Simulation results show that compared to the widely used time domain correlation algorithm and the Least Squares (LS) algorithm, the improved algorithm has better frequency adaptability and robustness, and performs superiorly in various channel environments.
23873 实测数据进一步验证了采用所提出的信道估计算法可较大提升参考信号的重构质量，从而有利于目标探测。 Real data processing results further demonstrate that it significantly raises the quality of the reconstructed signal using the proposed algorithm and provides a better condition for the target detection.
23874 为了解决近海岸海冰探测的难题，该文针对岸基平台提出一种利用 GNSS 卫星反射信号进行海冰厚度探测的方法。 To detect the sea ice in small-scale fixed sea area, a shore-based sea ice detecting method is developed using GNSS reflected signal.