ID 原文 译文
21785 常规相控阵雷达通过移相发射空间合成的相参信号形成能量聚集的天线方向图，由于收发天线复用因此所合成的天线孔径要低于收发分置的MIMO雷达。 Conventional phased array radar transmits coherent signal to form antenna pattern. By transmitting and receiving antenna reuse its aperture is always less than MIMO radar.
21786 该文首先通过理论推导MIMO雷达在探测性能上和相控阵雷达的一致性及区别，指出MIMO雷达的实质优势在于发射波束的数字赋形。 This paper firstly analyses the same points and the difference between MIMO radar and phased array radar. It further points out that the essential advantage of MIMO radar is the digital transmitting beam forming.
21787 然后设计一种基于防撞雷达的分集相控阵，发射端采用相控体制，接收端采用DBF数字波束形成，通过分析移相器位数对该雷达性能的约束，证明在指定波束指向上该雷达在避免产生正交信号的前提下能达到和MIMO雷达相同的虚拟孔径性能。 Second it designs a diversity phased array radar in collision avoidance atmosphere. Its transmitting part uses phase array system, while the receiving partuses the Digital BeamForming (DBF). Through the analysis for the limitation of the digits phase shifter, it proves that this radar can achieve the same virtual aperture performance as MIMO radar, while the rader can avoid to produce the orthogonal signal.
21788 最后通过计算机仿真，验证该方法的有效性和可行性。 Finally through the computer simulation it verifies the feasibility and effectiveness of the method.
21789 采用该雷达体制在保证合成波束宽度的前提下，能有效降低接收通道数，从而有效降低雷达成本并提高通道一致性。 This radar system can effectively reduce the cost and improve channel consistency under the premise of promised beam width.
21790 极化码拥有出色的纠错性能，但编码方式决定了其码长不够灵活，需要通过凿孔构造码长可变的极化码。 Polar codes have outstanding error correction performance, but the code length of conventional polar codes is not compatible because of their coding method. To construct rate-compatible polar codes, a segmented puncturing method is proposed.
21791 该文引入矩阵极化率来衡量凿孔对极化码性能的影响，选择矩阵极化率最大的码字作为最佳凿孔模式。对极化码的码字进行分段，有效减小了最佳凿孔模式的搜索运算量。 Using the rate of polarization, the puncturing effect is measured and the codeword is removed to make the largest rate of polarization, which is the optimal puncturing mode.
21792 由于各分段的第1个码字都会被凿除，且串行抵消译码过程中主要发生1位错，因此在各段段首级联奇偶校验码作为译码提前终止标志，检测前段码字的译码错误并进行重新译码。 As the first codeword of the optimal puncturing mode is 0, the parity check codes are introduced to detect the decoding error of preceding segments codeword.
21793 对所提方法在串行抵消译码下的性能进行仿真分析，结果表明，相比传统凿孔方法，所提方法在10–3误码率时能获得约0.7 dB的编码增益，有效提升了凿孔极化码的译码性能。 The decoding performance of the method is simulated, results show that this method can obtain about 0.7 dB coding gain at 10–3 bit error rate compared with the traditional puncturing method, which can effectively improve the performance of the punctured polar codes.
21794 谱聚类算法通常是采用高斯核作为相似性度量，并利用所有可用的特征来构建具有欧氏距离的相似度矩阵，数据集复杂度会影响其谱聚类性能，因此该文提出一种基于公理化模糊子集(AFS)的改进谱聚类算法。 Gaussian kernel is usually used as the similarity measure in spectral clustering algorithm, and all the available features are used to construct the similarity matrix with Euclidean distance. The complexity of the data set would affect its spectral clustering performance. Therefore, an improved spectral clustering algorithm based on Axiomatic Fuzzy Set (AFS) is proposed.