| 1. | It is expected that this scheme can realize the time synchronization , frequency synchronization and phase synchronization of the bistatic radar system effectively
分析论证表明，论文提出的双基地雷达同步系统方案是正确的和实现可行的。 |
| 2. | Bistatic wind fields synthesis equations are analysed and i educes target location equation in receiver including conversion from ground reference frame to one defined by us
分析了双基地雷达风场合成公式，推导了双基地雷达中目标在子站中的定位方程，其中涉及到从大地坐标系到本课题所定义的坐标系的转换。 |
| 3. | My paper introduces reference frame of bistatic doppler weather radar , basic geometry connection and the equation of bistatic doppler radar from the theory of bistatic doppler weather radar
本文从双基地多普勒天气雷达系统的原理出发，介绍了双基地多普勒天气雷达的坐标系、基本几何关系、双基地雷达方程。 |
| 4. | The error of each technology and revising of the error also are topics of focus . in the last section , the author presents a technical scheme of time and phase synchronization based on gps . furthermore , the maintenance of synchronization is discussed
第五章在以上基本理论和关键技术研究的基础上，提出了利用gps实现双基地雷达时间、频率同步的系统方案，并详细讨论了同步保持的问题，对相应的指标作了进一步的分析、论证。 |
| 5. | This field is very important because the synchronization degree will influence the operation of the radar system heavily . in this paper , the fundamental theory of bistatic radar system and the problems it faced is introduced . at the same time , the transmission technologies of time and frequency signal are discussed and the advantages and disadvantages of each technology is analyzed too
本文针对双基地雷达系统的时间、频率与相位同步进行了细致的分析、设计和论证，在充分比较各种授时技术优缺点的基础之上，结合双基地雷达系统的特点，提出了一种基于gps的时间、频率与相位同步方案。 |
| 6. | Then on one hand , author makes researches of anti - jamming against pulse jamming 、 gauss white noise jamming and radio frequency noise jamming from the side of signal processing . author exercises much signal processing knowledge of time - domain sliding window accumulation 、 wavelet analysis 、 time - frequency analysis and linear prediction and carries out many simulation experiments . on the other hand , author proposes the anti - jamming methods of using a sar similar to double - base radar and modulating the amplitude 、 the phase of emission signal and changing the frequency modulation slope from the side of changing sar system model
作者首先提出了合成孔径雷达抗干扰的定义、分类以及评价抗干扰方法好坏的主客观标准；然后，一方面从信号处理的角度出发对脉冲式干扰、高斯白噪声干扰以及射频噪声干扰进行了抗干扰研究，其中运用了时域滑动窗口积累，小波分析，时频分析以及线性预测等信号处理知识，做了大量的仿真实验；另一方面，本文基于改变合成孔径雷达系统模式提出了利用类似双基地雷达来抗干扰，以及对发射信号进行调幅、调相以及改变调频斜率来抗干扰，同样做了相应的仿真实验。 |
| 7. | The theoretical basis of bistatic radar system is introduced in second part . chapter 3 discusses the time base and frequency base , as well as the measure methods of time and frequency . the traditional transmission technology of time and frequency signal is analyzed in chapter 4
第一章概述了雷达的技术发展趋势；第二章重点论述双基地雷达系统基本理论，并对其中的关键技术进行了分析；第三章和第四章对双基地雷达系统中关键技术之一的时间、频率同步的相关技术问题进行了分析和研究。 |
| 8. | Also it can effectively solve the main " four - threat " of single radar system . however , there ' s some problems must to be resolved , such as time synchronization , space and phase synchronization , signal processing , and clutter constricting , etc . this thesis concentrates on the time synchronization and phase synchronization of bistatic radar system
双基地雷达体制和系统结构上的特殊性决定了它在技术上具有不同于传统雷达的一些特点，所以双基地雷达系统的研制首先需要解决时间同步、频率和相位同步、空间同步、信号处理、杂波抑制等关键技术。 |
| 9. | Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing , pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction . ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain . ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain
通过大量的理论分析和仿真实验，得到了一批具有一定价值的结论：从信号处理的角度出发，对于脉冲式干扰，能够运用时域滑动窗口积累的方法去掉，并且通过预测插值得到较好的恢复；对于高斯白噪声干扰，在时频变换域内应用时频分析方法可减小其对分散点目标的干扰；对于射频噪声，通过平均距离频频法和频域陷波的方法可以去掉；从改变合成孔径雷达系统角度出发，类似双基地雷达能够避免各种干扰，对发射信号进行调幅，调相以及改变调频斜率都是较好的抗干扰方法。 |
