CAJ | 학술논문

均匀圆阵(UCA)是一种应用广泛的具有二位波达角估计能力的平面阵列.为了从理论上分析不同阵列参数下到达波方位角(AOA)、仰角估计精度,推导了均匀圆阵二维波达角估计的性能界,以此为基础分析了阵列孔径、阵元个数、快拍数以及来波仰角高低与到达角估计精度的关系,并通过对UCA-MUSIC算法计算机仿真验证了推导结果的正确性.研究结果为波达角估计类算法提供了可供参考的性能下界,圆阵设计时也不再需要大量的Monte Carlo仿真试验确定阵列参数,可直接从估计精度表达式中获得.
균균원진(UCA)시일충응용엄범적구유이위파체각고계능력적평면진렬.위료종이론상분석불동진렬삼수하도체파방위각(AOA)、앙각고계정도,추도료균균원진이유파체각고계적성능계,이차위기출분석료진렬공경、진원개수、쾌박수이급래파앙각고저여도체각고계정도적관계,병통과대UCA-MUSIC산법계산궤방진험증료추도결과적정학성.연구결과위파체각고계류산법제공료가공삼고적성능하계,원진설계시야불재수요대량적Monte Carlo방진시험학정진렬삼수,가직접종고계정도표체식중획득.
Uniform circular array(UCA)is a kind of widely used planar array which provides 2-D angle of arrival (AOA)estimation. In order to analyze the precision of this estimation under different array shape,the perfor-mance bound for 2-D angle estimation with uniform circular array is deduced and influence of array aperture,el-ement number,snapshot and elevation angle on estimation accuracy is shown. Finally computer simulation of UCA-MUSIC algorithm is given to compare with the Cramer-Rao bound(CRB)derived. The conclusion provides a performance bound for AOA estimation algorithms and proposes a new method for UCA design instead of Monte Carlo simulations with large amount of calculation.