您的位置: 专家智库 > >

国家自然科学基金(60825104)

作品数:5 被引量:16H指数:2
相关作者:李军夏菲陶海红金明廖桂生更多>>
相关机构:西安电子科技大学更多>>
发文基金:国家自然科学基金更多>>
相关领域:电子电信更多>>

文献类型

  • 5篇期刊文章
  • 1篇会议论文

领域

  • 6篇电子电信

主题

  • 2篇雷达
  • 1篇电平
  • 1篇多输出
  • 1篇多输入多输出
  • 1篇多输入多输出...
  • 1篇多通道
  • 1篇遗传算法
  • 1篇杂波
  • 1篇杂波抑制
  • 1篇去相关
  • 1篇自适应
  • 1篇自适应通道均...
  • 1篇稀布阵
  • 1篇目标回波
  • 1篇回波
  • 1篇机载
  • 1篇发射分集
  • 1篇非均匀
  • 1篇分布式
  • 1篇分集

机构

  • 3篇西安电子科技...
  • 1篇中国人民解放...
  • 1篇武警工程学院...

作者

  • 2篇李军
  • 1篇陶海红
  • 1篇刘向阳
  • 1篇廖桂生
  • 1篇金明
  • 1篇夏菲
  • 1篇曲毅

传媒

  • 3篇Journa...
  • 1篇雷达科学与技...
  • 1篇中国科学:信...
  • 1篇第十四届全国...

年份

  • 1篇2013
  • 2篇2011
  • 1篇2010
  • 2篇2009
5 条 记 录,以下是 1-6
排序方式:
机载多通道GMTI雷达自适应通道均衡方法研究
在实际的机载多通道GMTI系统中,通道间失配误差的存在降低了地杂波的抑制性能,进而影响了弱运动目标的检测。本文在分析多通道雷达地杂波信号特性的基础上,提出了一种基于回波数据的通道均衡方法。该方法就可以对馈线和接收机的失配...
刘向阳廖桂生曲毅朱圣棋
关键词:GMTI杂波抑制
文献传递
分布式发射阵列下目标回波相关性分析被引量:2
2010年
发射分集多输入多输出(MIMO)雷达利用分布式发射阵列对目标回波去相干,然后利用集中式接收阵列直接使用接收到的目标回波(不分离各发射阵元的信号)进行多目标角度估计.文中分别在Swerling I和II目标模型下,分析了目标回波之间的相关性.通过分析得到:(1)在Swerling II模型下,目标回波不相关(2)在Swerling I模型下,要使目标回波的相关性随着发射阵元数的增加而降低,发射阵元增加前后的信号归一化协方差矩阵要满足一定关系,文中给出了这个关系最后目标回波相关性和角度估计性能的计算机仿真验证了理论分析的正确性.
金明廖桂生李军
关键词:多输入多输出雷达发射分集目标回波去相关
基于改进遗传算法的非均匀稀布阵列优化被引量:12
2009年
提出了一种对非均匀稀布阵列阵元间距进行优化的改进的遗传算法。该算法在编码时,将阵元间距依据尺寸步长划分为不同的节点,通过对节点的二进制编码,灵活实现带约束阵元间距的遗传编码。在遗传操作过程中,依据不同的进化阶段自适应设定算子系数,有效地提高了遗传算法的收敛性。文中采用同时考虑副瓣电平和波束宽度的双适应度函数,使优化得到的天线阵列方向图比采用单适应度函数有较好的综合性能。最后通过大量仿真结果验证了这一算法的有效性。
夏菲陶海红李军
关键词:稀布阵副瓣电平波束宽度遗传算法
COMPARISON OF TDOA LOCATION ALGORITHMS WITH DIRECT SOLUTION METHOD被引量:1
2011年
For Time Difference Of Arrival(TDOA) location based on multi-ground stations scene,two direct solution methods are proposed to solve the target position in TDOA location.Therein,the solving methods are realized in the rectangular and polar coordinates.On the condition of rectangular coordinates,first of all,it solves the radial range between the target and reference station,then cal-culates the location of the target.In the case of polar coordinates,the azimuth between the target and reference station is solved first,then the radial range between the target and reference station is figured out,finally the location of the target is obtained.Simultaneously,the simulation and comparison analysis are given in detail,and show that the polar solving method has the better fuzzy performance than that of rectangular coordinate.
Li ChunLiu CongfengLiao Guisheng
AN APPROACH TO SUPPRESS SHORT-RANGE CLUTTER FOR NON-SIDE LOOKING AIRBORNE RADAR
2011年
When the Airborne Early Warning(AEW) radar transmits medial or high Pulse Repetitive Frequency(PRF) signal,the range ambiguity occurs.The clutter of short-range clutter has serious range dependence problem for non-Side Looking Airborne Radar(non-SLAR).As a result,the clutter plus noise covariance matrix can not be estimated correctly,and the performance of clutter suppression obtained by Space-Time Adaptive Processing(STAP) degrades greatly.The uniform linear array has not elevation degrees;therefore,the short-range clutter can not be suppressed directly.A short-range clutter suppression method is proposed.The method first estimate the elevation angles of the ambiguous short-range gate,then eliminates short-range clutter by space time interpolation and adds moving target protection in the procedure.This method can suppress the short-range clutter well.Simulation results show the validity of the method.
Li MingLiao GuishengZhang Liang
ANALYSIS OF TRANSMIT BEAMFORMING PERFORMANCE ON MULTIPLE-TRANSMIT BINARY ZCZ WAVEFORMS被引量:1
2013年
The Transmit BeamForming (TBF) technology, applied in a multiple-transmit radar system, is studied in this paper, where multiple elements of antenna array transmit binary Zero Correlation Zones Orthogonal Signals (ZCZ-OS) independently. For each Direction Of Arrival (DOA) with respect to the transmitting array, the analysis on the gain and sidelobe level of TBF output is presented. This paper focuses on the range sidelobes performance within the main beam (in angle domain). For the normal direction, due to the inherent phase property of ZCZ-OS, the TBF output has part zero sidelobes area, of which the distribution is discussed. For the other directions, a systematic search algorithm to optimize the transmission order of signals is proposed for an optimal relationship chart of DOA and transmission order. The range sidelobe performance within the main beam can be improved as the optimal transmission order is adopted.
Li WeipingLiao GuishengTao HaihongZhang Jinze
共1页<1>
聚类工具0