一场近场修正型干扰抑制波束形成算法  

A Bartlett Null Constraint Beamforming Method for Near Field Interference Suppression

作　　者：周彬 宋雪晶[1,2] 陈阳[4] 赵安邦 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [3]杭州应用声学研究所声纳技术重点实验室,杭州浙江310023 [4]常州大学信息科学与工程学院,江苏常州213164

出　　处：《计算机仿真》2015年第7期182-185,221,共5页Computer Simulation

基　　金：国家自然科学基金(11374072;61371171);国家自然科学基金青年科学基金(51009041);公益性行业(海洋)科研专项基金(gz201005001);海洋工程国家实验室开放基金项目(1316)

摘　　要：当本地信号声纳平台发射或存在动力噪声源时,产生的近场干扰由于辐射面按照球面波扩展,因而到达水平直线阵各阵元的时延差不同,如果按照远场平面波处理将带来干扰抑制性能的下降。若按照近场处理,则扫描远场目标时将大大增加了运算量。针对上述问题,对近场干扰按照球面波进行时延差修正,提出修正型Bartlett零点约束波束形成器。并针对多个近场干扰源或一个多亮点模型干扰源时,推导得出了多零点约束时的修正型Bartlett零点约束波束形成器。通过理论推导和算法仿真比较修正前后的干扰抑制效果,仿真数据的处理结果得出,修正型Bartlett零点约束波束形成技术能有效抑制近场干扰对远处目标的探测。Since the interference source radiates as near field spherical wave,the time delays from the source to the level linear array elements are different. The interference suppressions performance declines when it is processed as near field plane wave. The computations of scanning the far field target increased greatly when it is processed as near field. Focusing on this problem,this paper modified the time delay of the near field interference source as near field spherical wave,proposed the Modified Bartlett Zeros Constraints Beamformer. And focusing the near field interference with multi-source or one source with multi-highlight model,this paper deduced and obtained the Modified Bartlett Multi-Zeros Constraints Beamformer. The interference suppressions performance before and after correction were compared through theory derivation and algorithm simulation. The simulation results verifies that Modified Bartlett Zeros Constraints Beamforming Technique can restrain the interference caused by the near field source in the detection of distant target.

关 键 词：近场干扰 零点约束 波束形成 球面修正 

分 类 号：TN911.7[电子电信—通信与信息系统]