ID 原文 译文
53427 仿真结果为 MIMO 雷达的系统设计提供了一定的理论基础。 The results are very significant to the design of MIMO Radar.
53428 为了保证 MIMO 系统无线传输安全，提出了一种基于投影的物理层安全传输方案。 A scheme based on projection operator is proposed to guarantee the information theoretical security in MIMO physical layer transmission.
53429 基站在合法信道的投影空间发射相互正交的涉密信号和干扰信号，干扰窃听方恢复信息，同时不影响期望用户接收信号。 The transmitter has multiple antennas and is able to simultaneously transmit separately information bearing signal to the intended receiver and randomized interference to the eavesdropper in the projection space.
53430 给出了两种信号保密容量准则下功率分配的迭代算法。 An iterative algorithm of power allocation between them is given according to the secret channel capacity criteria.
53431 通过分析干扰对窃听信号统计特性的影响，证明了对窃听方盲处理造成的不确定度(indeterminacy)。 Based on the special statistical distributions of the adversary’s received signal, the indeterminacy of its blind deconvolution is proved.
53432 仿真结果表明，该方案具有较高的保密信道容量，在期望用户处获得比已有方案更低的误码率，而窃听方无法正确解调。 Numerical results indicate that the secret channel capacity of this scheme is enhanced with reduced bit error rate at the target user, while the eavesdropper can not demodulate correctly.
53433 提出了一种新颖的基于尺度不变特征变换（SIFT）和主成分分析（PCA）的感知哈希方法。 This paper presents a novel perceptual hashing method based on scale invariant feature transform (SIFT) and principal component analysis (PCA).
53434 SIFT 特征在通常的图像处理中具有很强的稳定性，并具有尺度和旋转不变性，通过对哈希生成两阶段框架的详细分析，SIFT 算法用来提取图像的局部特征点，PCA 用来对特征数据的信息压缩。 SIFT features are invariant to image scaling and rotation, and stable to common image processing. Through the detailed analysis of two-stage framework of generating hash, SIFT is used to capture the local features of image. PCA is used to compress features information.
53435 每个特征点的 PCA 基的叠加构成图像哈希，在叠加中采用了伪随机处理，增强了算法安全性， Final hash is generated by summing PCA basis of each key point. The method uses pesduo-randomly processing for enhancing security of the algorithm.
53436 图像之间的相似度通过哈希的归一化相关值来确定。 The similarity of images is determined by hash normalization correlation.