| 1. | The detection performance of receiver to noise jamming signal was improved remarkably by accumulation detection
通过积累检测显著地改善了接收机对噪声干扰类信号的检测性能。 |
| 2. | It ' s jam characters are similar to radio - frequency noise jamming . relayed frequency shift jamming has good effect on pc radar
转发移频脉冲干扰对于脉冲压缩雷达是极为有效的干扰。 |
| 3. | Thereafter according to the analysis of variable network noises , the paper lists the damage degree of noise jam to the network
同时结合了网络的拓扑结构详细的阐述了漏斗效应的形成和漏斗噪声的来源。 |
| 4. | To implement effective jamming on the modem coherent radar , this paper proposes one smart noise jamming realization scheme based on convolution modulation
摘要为了对现代新体制相参雷达实施有效的干扰，提出了一种基于卷积调制的灵巧噪声干扰技术实现方案。 |
| 5. | Radio - frequency noise jamming is an effective jamming to pulse compressed ( pc ) radar . it shows the best jam quality when it ' s bandwidth equals to the jammed signal ' s bandwidth and it ' s central frequency equals to that of the jammed radar ' s receiver
射频噪声干扰对脉冲压缩雷达是一种有效干扰，在其带宽等于雷达信号带宽，中心频率对准雷达的中心频率时具有最佳的干扰品质。 |
| 6. | The drfm can store a transmitted signal of the radar and replicate it on command . properly implemented , in addition to radar signals , the drfm can generate noise jamming and other electromagnetic signals typically experienced in the ew environment . other difficult to generate deception spectrums can be easily implemented by analysis of the desired spectrum
本课题为射频仿真系统的一个组成部分，设计指标要求有300mhz的瞬时带宽，本系统采用采样速率为1ghz的超高速模数转换器( adc ) ，实际使用两个采样速率为500mhz的adc交替采样以达到1ghz 。 |
| 7. | Then evaluate the counter - suppression ability of similar noise jamming toward the anti - jamming methods of sar , through the simulation experiment . at last the author analyzed the jamming ability of similar noise jamming to the moving target indication ( mti ) and carried on the confirmation through the simulation experiment
然后对类杂波干扰对于sar抗干扰方式的反抑制性能进行评估,通过仿真实验验证了类杂波干扰具有较好的反抑制能力。最后分析了类杂波干扰对运动目标显示( mti )的干扰效果,通过仿真实验进行验证。 |
| 8. | 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。 |
| 9. | This paper gives us too ways ： one is to adopt a better modulation mechanism , s - cdma , to bate noise jamming . the other way is to implement automatic frequency agility under strong noise , based on the ranging and burst configuration mechanism of current docsis protocol , meanwhile , guaranteeing cmts ' s normal operating . this paper comprehensively analyzes the anti - jamming mechanism of docsis , then presents the specific implementation of the latter method
如何降低噪声对网络的危害，本论文指出了两个方向，其中一个就是在调制体制上下工夫，采用s - cdma体制，通过改变调制方式来主动的抑制噪声的影响；另一个方向就是基于现在协议提供的抗噪声干扰的机制，充分挖掘测距机制和灵活的突发配置机制的抗干扰潜力，以不影响头端设备的正常运行为前提，以它们为基础实现能自动避开强噪声干扰的频率转移。 |
| 10. | This dissertation analyses the back ground clutter ’ s characteristic of sar and the serious influence to sar target detection and classification . based on analyzing jamming methods in existence such as noise jamming and cheat jamming , and the anti - jamming ability of high - resolution sar , the author puts forward a new matching jamming which is time , frequency and dopple fields multidimensional - matching - overcast similar clutter ’ s jamming
本文通过对sar背景杂波的特性分析和背景杂波对sar目标检测和识别的影响,结合目前传统干扰体制的不足,以及sar自身强抗干扰的能力,研究了一种对sar的时域、频域和多普勒域多维匹配覆盖的类杂波干扰新方法。 |
