双正交发射前视声纳波束形成算法研究  

Reasearch on Beam-forming Algorithm of Biorthogonal Transmitting Forward-Looking Sonar

作　　者：陈志鹏 孟士超 夏文杰 CHEN Zhipeng;MENG Shichao;XIA Wenjie(Military Representative Office of Shenyang Bureau in Huludao,Huludao 125003;National Ocean Technology Center Zhangzhou Base Preparation Office,Xiamen 361001)

机构地区：[1]海装沈阳局驻葫芦岛地区军事代表室,葫芦岛125003 [2]国家海洋技术中心漳州基地筹建办公室,厦门361001

出　　处：《舰船电子工程》2021年第4期37-42,116,共7页Ship Electronic Engineering

基　　金：国家自然科学基金项目(编号:61101205,41304015);装备预研基金重点项目(编号:9140A31010114MQ01)资助。

摘　　要：论文基于非"停走停"模型提出了双正交发射的前视声纳成像算法,利用等效相位中心思想,确定了双正交发射阵型,选择了合适的正负线性调频发射信号,并推导了时延和多普勒表示式。根据理论分析和仿真验证,通过远近场等效对比发现等效相位中心思想在近场做信号处理时并不适用,需根据实际的几何关系来完成场景内逐点的波束形成。从结果来看,双发多收的特点较为突出,无论远场近场均可以在方位向提高一倍的分辨率。Based on the non stop-go-stop model,this paper proposes a forward-looking sonar imaging algorithm of biorthogonal emission,uses the idea of equivalent phase center,determines the biorthogonal emission array,selects the appropriate positive and negative LFM emission signals,and derives the expressions of time delay and Doppler. According to the theoretical analysis and simulation verification,through the far-field and near-field equivalent comparison,it is found that the idea of equivalent phase center is not suitable for near-field signal processing,and point by point beam-forming in the scene needs to be completed according to the actual geometric relationship. From the results,the characteristics of the double transmitter and multi receiver are more prominent. The resolution can be doubled in the azimuth direction in both the far field and the near field.

关 键 词：前视声呐 波束形成 等效相位中心 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]