有向阵元圆形阵列声纳波束形成原理及实现  

Beam-forming principle and implementation of circular array composed of directional elements

作　　者：颜海[1] 庄圣贤[1] 李杰[2] 庄晓明[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]北京理工大学宇航科学技术学院,北京100081

出　　处：《声学技术》2009年第1期73-77,共5页Technical Acoustics

基　　金：十一五国防预研基金(51305050203)

摘　　要：有向阵元阵列接收具有区域指定性好和灵敏度高的优点而被广泛应用于雷达、水声信号目标探测。探讨了基于有向阵元圆阵的波束形成原理并设计出基于FPGA的自适应数字波束形成(ADBF)模块,仿真结果表明有向阵元形成的波束图较全向阵波束图有明显改善,LMS自适应算法对干扰能有效抑制,从而提高了系统输出信号干扰噪声比(SINR)。Due to its better regional direction and high sensitivity, the array composed of directional elements is widely used in radar and underwater sonar target detection. The beam-forming principle of the circular array composed of directional elements is studied. The design and its FPGA implementation of the adaptive beamforming are discussed in detail.Simulation results show that the beam pattern of the circular array composed of directional elements is improved in comparison with the traditional one. And the interference is effectively repressed by using the LMS adaptive algo- rithm. Thus, the signal-to-noise ratio of the system can be increased.

关 键 词：圆阵列 辐射方向图 阵列波束图 最小均方算法 FPGA 

分 类 号：TB556[理学—物理]