CAJ | 학술논문

针对阵列模型误差难以建模的问题，提出一种新的非参数化有源校正方法。首先，测量部分离散方向点上的导向矢量。然后，利用测得的导向矢量拟合所有的模型误差曲面，并得到多项式系数。最后，在DOA估计时利用多项式系数计算所有方向和频率上的导向矢量。该方法适用于宽带阵列，且需要的数据存储量小。仿真实验结果表明该方法的校正误差非常小。因此，该方法具有一定的工程实用价值。
침대진렬모형오차난이건모적문제，제출일충신적비삼수화유원교정방법。수선，측량부분리산방향점상적도향시량。연후，이용측득적도향시량의합소유적모형오차곡면，병득도다항식계수。최후，재DOA고계시이용다항식계수계산소유방향화빈솔상적도향시량。해방법괄용우관대진렬，차수요적수거존저량소。방진실험결과표명해방법적교정오차비상소。인차，해방법구유일정적공정실용개치。
Considering that array model errors is diffcult to be modeled,a new non-parametric method of active calibration is proposed in this paper. First,the steering vectors in discrete directions are measured. Then,all curved surfaces of model errors is fitted with the measured steering vectors. Finally,the multinomial coefficients of the curved surfaces are used to compute the steering vectors for DOA estimation. The new method which requires little memory space,is applicable to wideband array. The results of simulation experiments show that the calibration errors of the new method are very small. Therefore,the new algorithm is valuable in engineering practice.