改进的LCMV算法在多波束形成中的应用  

Application of improved LCMV algorithm in multi-beam forming

作　　者：何梅昕 束坤[2] 

机构地区：[1]江苏科技大学,江苏镇江212300 [2]中船重工集团723研究所,江苏扬州225001

出　　处：《现代电子技术》2014年第17期23-25,共3页Modern Electronics Technique

摘　　要：基于线性约束最小方差(LCMV)算法的自适应波束形成技术,得到的方向图能保证期望信号方向增益最大,非期望方向形成零陷。但实际应用中由于不可避免的存在阵元位置误差、阵元相位误差及指向误差等(统称为相位误差),使约束的导向矢量与真实期望信号的导向矢量不一致,从而影响系统的性能。改进的LCMV波束形成算法——基于迭代二阶锥的唯相位波束形成技术,通过改变移相器的相位,使各阵元输出信号相位一致,在多个方向上形成主波束,阵列输出功率最大。The directional pattern of adaptive beam forming based on linearly constrained minimum variance（LCMV）algo-rithm can ensure the maximum signal gain in the desired direction and the null formation in undesired direction. In the practical application,the constrained orientation vector is inconsistent with the orientation vector of real desired signal due to the inevita-ble presence of sensor position error,array element phase error and pointing error（they are collectively called phase error）,thus system performance is affected. The improved LCMV beam forming algorithm（phase-only beam forming technology based on itera-tive second-order cone technology） makes the phase of the output signal of each element consistent by changing the phase of phase shifter,so that the main beam is formed in multiple directions and the maximum output power of the array is realized.

关 键 词：线性约束最小方差算法 迭代二阶锥 自适应方向图控制 唯相位波束形成技术 

分 类 号：TN821.91[电子电信—信息与通信工程]