ID 原文 译文
56468 对于复杂运动目标,传统基于距离–多普勒(range-Doppler, RD)原理的逆合成孔径雷达(inverse synthetic aperture radar, ISAR)成像性能下降:在距离维上,高速运动导致一维距离像展宽,且雷达系统硬件能力制约了大带宽实现,约束成像纵向分辨率;在多普勒维上,非合作复杂运动呈现的时变和非线性破坏成像条件,约束成像横向分辨率. Fora maneuvering target, however, the resolution of the traditional range-Doppler-based inverse synthetic-apertureradar (ISAR) imaging decreases on both the range and azimuth directions. Along the range direction, theresolution is determined by the bandwidth of the radar, which is limited by the hardware of the radar system. In addition, the high velocity of the target can result in a stretch of the range profile, thus decreasing theresolution. Along the azimuth direction, the complex target motion produces a time-varying nonlinear Dopplerfrequency, which destroys the imaging conditions for ISAR and causes a reduction of the resolution.
56469 本文首先分析了复杂运动对ISAR成像的影响机理,接着从距离和多普勒两个维度,对复杂运动目标ISAR成像技术进行了综述,阐述了高速运动补偿、多频段融合成像、高次相位补偿与稀疏ISAR成像等技术途径. In this paper,the effects of the target complex motion on ISAR imaging are firstly presented. The process of ISAR imagingfor maneuvering targets is then elaborated from the dimensions of the range and Doppler. In this regard, high?velocity compensation, multiband fusion imaging, high-order phase-error compensation, and sparse ISAR imagingare mainly presented.
56470 进一步针对ISAR成像体制的局限,阐述了复杂运动目标波前调制超分辨雷达成像新途径,其中包括波前随机调制和电磁涡旋两种技术途径. Several techniques of radar imaging for maneuvering targets, which could overcome someshortcomings of ISAR imaging, are then discussed, including the wave front modulation and electromagneticvortex imaging.
56471 最后对复杂运动目标雷达成像进行了总结与展望. Finally, the current works on radar imaging for maneuvering targets are summarized, and futureperspectives are discussed.
56472 近地小行星既是人类科学探测的重要目标,也是对人类地球家园构成重要威胁的灾害之源. Near-Earth asteroids (NEAs) are the main targets of science exploration as well as a possible source ofdisasters that pose an important threat to the earth.
56473 利用地基雷达系统进行近地小行星探测具有独特的技术优势. Ground-based asteroid radar detection has unique technicaladvantages.
56474 随着我国科技实力的不断增强,开展近地小行星雷达探测已经成为科学探测、国家安全和国际义务等领域的关注重点. With the continuous enhancement of China’s scientific and technological strength, the exploration ofNEAs has become the focus of science, national security, and international obligations.
56475 本文以此为背景,探讨了我国在科学探测、国家安全和国际义务3个领域的近地小行星雷达探测需求,分析了国际上主要的行星雷达系统技术现状和后续重点技术发展方向. Based on this background,this paper discusses the requirements of science, national security, and international obligations for the radardetection of NEAs in China and analyzes the technical status of major planetary radar systems in the world aswell as possible future development directions.
56476 结合我国深空测控网和射电天文网的技术现状及未来的发展规划,对后续我国建设地基小行星探测雷达系统的主要技术途径进行探讨,并对不同技术途径的特点进行了初步分析. Based on the technical status and future development plan of thedeep-space tracking, telemetry, and command (TT&C) network and radio astronomy network in China, the maintechnical approaches for the follow-up construction of ground-based asteroid radar detection systems in China arediscussed, and the characteristics of different technical approaches are analyzed
56477 针对可能存在对抗的未知通信环境,本文探讨了一种能进行智能适变的通信节点体系架构. This paper discusses a communication node architecture that can intelligently adapt to the unknown and possible confrontation-communication environment.