| 陈新华,郑恩明.基于分组时延预处理的时域波束形成方法*[J].,2019,38(4):545-552 |
| 基于分组时延预处理的时域波束形成方法* |
| Time domain beam-forming algorithm based on sub-group time delay preprocessing |
| 投稿时间：2019-01-28 修订日期：2019-07-03 |
| 中文摘要: |
| 对于不等强度多目标情况下的弱目标检测问题，依据波束形成归一化指向性函数在目标方向上输出值为1、在非目标方向上输出值为小于1的特性，提出一种基于分组时延预处理的时域波束形成方法。该方法首先对线列阵接收数据进行分组处理；然后，按搜索角度对各组数据进行时延预处理，并对各组预处理结果进行相加，得到一组新数据；最后，对该组新数据按时域波束形成进行处理，得到该搜索角度对应波束值。理论推导、数值仿真和试验数据处理结果均表明：相比常规时域波束形成，该方法所得波束形成指向性函数发生了变化，旁瓣级得到了13dB以上的改善，降低了强目标旁瓣级对弱目标检测的影响。 |
| 英文摘要: |
| For the problem of weak targets detection under the condition of multiple targets, according to the feature of the value of normalized directivity function being 1 on target direct and being less than 1 on non-target direct, a time domain beam-forming method based on sub-group & time delay preprocessing was proposed. Firstly, makes sub-group preprocessing for linear array receiving data. Then, does time delay pretreatment for the data of sub-group on the search angle, accumulates the results of time delay pretreatment and obtains a new set of data. Lastly, obtains the beam value of the search angle by time delay beam-forming. The theoretical analysis, numerical simulation and experimental results show that, compared with conventional beam-forming, the directivity function of this method has changed, the side-lobe level is improved more than 13dB, reduces the impact of side-lobe level on weak targets detection. |
| DOI：10.11684/j.issn.1000-310X.2019.04.011 |
| 中文关键词: 时域波束形成 指向性函数 分组时延预处理 旁瓣级 弱目标检测 |
| 英文关键词: time domain beam-forming directivity function sub-group time delay preprocessing side-lobe level weak target detection |
| 基金项目: |
|
| 摘要点击次数: 1823 |
| 全文下载次数: 1366 |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
