ID 原文 译文
55597 分布式干扰是一种近距离、空间密集型干扰,单基雷达常用的超低旁瓣天线、天线旁瓣对消和旁瓣匿影等技术难以与其进行有效对抗。 Intensive distributed jamming is a near distance and space interference, single-base radar commonly used ultra low sidelobe antenna, the antenna sidelobe cancellation and sidelobe unseen shadow technology such as difficult to effectively against.
55598 双基条件下,远距离的目标和近距离的干扰机必将在其相对于发射阵列或接收阵列的角度上存在较大差异。 Double-base condition, the distance of the target and jammer should close on its relative to the Angle of the transmitting array or receiving array is put in bigger difference.
55599 利用该现象,提出了一种双基地MIMO雷达抗分布式干扰的方法。 Use of this phenomenon, this paper proposes a bistatic MIMO radar distributed interference method.
55600 该方法通过发射阵列多阵元正交发射的方式在目标回波及转发式干扰信号中分别嵌入了目标和干扰机相对于发射阵列的角度信息,随后在接收阵列上通过等效收、发二维空域滤波处理即可有效地滤除分布式干扰信号。 This method is the transmission way by yuan more array orthogonal respectively in the target back forward sweep type jamming signal embedded in the target and jammer array relative to the launch point of information, then on the array by equivalent charge, two-dimensional spatial filtering processing can effectively filter out the distributed jamming signal.
55601 数值仿真的结果证明了该方法的有效性。 Numerical simulation results prove the effectiveness of the proposed method.
55602 针对单通道同频数字混合信号时延估计问题,提出了一种数据辅助的方法,将整个估计流程分成了基于数据辅助的时延粗估计与基于最大似然的时延精估计两个过程。 For single channel with frequency digital mixed signal time delay estimation problem, put forward a method of secondary data, the whole process is divided into an estimated based on the data of auxiliary time delay coarse estimation and time delay based on maximum likelihood estimate two process.
55603 该方法克服了以往基于最大似然同频混合信号时延估计的很多弊端,改进了搜索方式并探讨了消除时延模糊的方法,提高了估计精度。 This method overcomes the past based on maximum likelihood with many defects of mixed signal time delay estimation and improve the way search and eliminate the time delay is discussed the method of fuzzy, improve the estimation precision. Then analyzes the performance, provide the theoretical basis for the performance analysis of this method.
55604 最后又分析了性能界,为本文方法的性能分析提供了理论依据。该方法较依赖于两路时延差,对频偏误差不敏感,仿真实验验证了该方法的有效性与实用性。 This method is dependent on two way time delay difference, is not sensitive to frequency offset error, the simulation results verify the effectiveness of the proposed method and practical.
55605 中段弹道目标的主要特征是高速平动和微动。 Middle ballistic targets is the main characteristic of the translation and micro.
55606 因此测量得到的目标多普勒频移值是模糊的,而且同时被目标微多普勒调制。 So the measurement of target doppler frequency shift value is vague, and at the same time be target micro-doppler modulation.