CAJ | 학술논문

空间重采样方法是一种不需要角度预估计的宽带DOA估计方法，它利用相位聚焦的方法实现宽带信号中不同信号子带的信号子空间的一致。而基于FFT变换的空间重采样算法利用傅里叶变换特性实现空间采样频率的变换，但此方法对阵元的选择以及参考频率的选择等都有一定的要求，本文从阵元个数、参考频率、子带划分、信号入射角度以及信号带宽等多个方面对基于FFT 空间重采样算法进行了全面细致的性能仿真分析，为该方法的应用推广、工程实现提供了较为有意义的参考。
공간중채양방법시일충불수요각도예고계적관대DOA고계방법，타이용상위취초적방법실현관대신호중불동신호자대적신호자공간적일치。이기우FFT변환적공간중채양산법이용부리협변환특성실현공간채양빈솔적변환，단차방법대진원적선택이급삼고빈솔적선택등도유일정적요구，본문종진원개수、삼고빈솔、자대화분、신호입사각도이급신호대관등다개방면대기우FFT 공간중채양산법진행료전면세치적성능방진분석，위해방법적응용추엄、공정실현제공료교위유의의적삼고。
Spatial resampling is a wideband direction of arrival (DOA) estimation method with no need to pre-estimate the angle of incidence .It uses phase focusing to uniformize the subspaces of wideband sig-nal’s sub-bands .The spatial resampling method based on FFT uses the Fourier transform to adjust the spatial resampling rate .Yet ,the performance of the spatial resampling method based on FFT largely de-pends on such factors as the amount of array elements ,choice of the reference frequency ,etc .A detailed performance analysis of the spatial resampling method based on FFT is given .This analysis is given from multiple aspect ,e .g .number of array elements ,reference frequency ,sub-band division ,angles of incidence ,signal bandwidth ,etc ,w hich makes it a valuable reference for follow-up study and engineer-ing implementation .