| 1. | The effects of sea echo to this method is also analyzed
分析了海杂波对该方法的影响并提出了相应的对策。 |
| 2. | The random sea echo generation does ' t accord with the mechanism of sea echo generation
以前的随机生成算法，不符合海杂波的生成机制。 |
| 3. | Research reveals that the intensity of sea echo accords with the weibull distribution
研究发现，海杂波的强度在统计上符合韦布尔分布。 |
| 4. | It will be discussed in chapter 4 section 2 that how to generate sea echo accord with weibull distribution
如何生成符合韦布尔分布的海杂波将在第四章第二节中论述。 |
| 5. | All of the above will be explained in details in chapter 4 section 1 . 2 ) simulation of sea echo determines the quality of radar echo image to a great extent
2 ）雷达回波中海杂波生成模拟的仿真程度，在很大程度上也决定了雷达回波图橡的质量。 |
| 6. | One of these problems is the broadening of the first order sea echo doppler spectrum , which most likely swamps the targets spectrum
本文针对这样一个关键性问题?展宽海浪谱中信号检测问题展开研究,即如何应用超分辨谱估计技术来实现目标的检测与分辨。 |
| 7. | Because of the presence of the first - order sea echoes with dominant amplitude , the doppler resolution technique which based on the range - velocity transformation is needed to extract the targets information in hf radar
高频雷达工作在拥挤的短波波段,由于绝对占优的一阶海浪回波的存在,必须采用基于距离?速度谱变换的多普勒频率分辨技术来处理杂波,以提取目标信息。 |
| 8. | Super - resolution spatial spectrum estimation is applied in this dissertation to realize bearing resolution by utilizing the different bearings between targets and first - order sea echoes . the simulation of radar echoes in one resolution cell is presented based on the theoretically analyzing hf sea clutter sea clutter reflection characteristic and sea echo spectrum stretching mechanics
本文从分析高频海杂波反射特性以及平台运动引起海浪展宽机理入手,建立便于理论研究的一阶展宽的海杂波和二阶海杂波模型;在分辨单元上对雷达回波信号进行了仿真。 |
| 9. | All of above presents the data to study the algorithm which will be used to detect the targets against the broadened bragg lines . eigenstucture - based algorithms are used to realize bearing resolution on the basis of synthetically comparing several classical algorithms . first sea echo ’ s bearing prior knowledge is utilized to constitute project operator to constraint the noise subspace estimation with the use of constrained music algorithms , which largely increases the resolution and doa estimated accuracy
为检测海上目标的方位信息,在综合分析比较各类算法的基础上,本文采用特征结构类算法来实现空间方位分辨中的constrainedmusic算法,此方法充分利用了海浪的方位先验信息来构造投影算子约束噪声子空间的估计,大大提高了目标分辨率和估计精度。 |
