现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
17期
23-25
,共3页
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
線性約束最小方差算法%迭代二階錐%自適應方嚮圖控製%唯相位波束形成技術
선성약속최소방차산법%질대이계추%자괄응방향도공제%유상위파속형성기술
linearly constrained minimum variance algorithm%directional pattern%iterative second-order cone adaptive con-trol%phase-only beam forming technology
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。
基于線性約束最小方差（LCMV）算法的自適應波束形成技術，得到的方嚮圖能保證期望信號方嚮增益最大，非期望方嚮形成零陷。但實際應用中由于不可避免的存在陣元位置誤差、陣元相位誤差及指嚮誤差等（統稱為相位誤差），使約束的導嚮矢量與真實期望信號的導嚮矢量不一緻，從而影響繫統的性能。改進的LCMV波束形成算法--基于迭代二階錐的唯相位波束形成技術，通過改變移相器的相位，使各陣元輸齣信號相位一緻，在多箇方嚮上形成主波束，陣列輸齣功率最大。
기우선성약속최소방차（LCMV）산법적자괄응파속형성기술，득도적방향도능보증기망신호방향증익최대，비기망방향형성령함。단실제응용중유우불가피면적존재진원위치오차、진원상위오차급지향오차등（통칭위상위오차），사약속적도향시량여진실기망신호적도향시량불일치，종이영향계통적성능。개진적LCMV파속형성산법--기우질대이계추적유상위파속형성기술，통과개변이상기적상위，사각진원수출신호상위일치，재다개방향상형성주파속，진렬수출공솔최대。
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.
