CAJ | 학술논문

针对复杂战场环境下，接收机周围可能存在多个照射源，并且照射源基本信息未知，无法区分感兴趣信号和干扰信号，无法得到准确的感兴趣基站方位信息的问题，提出基于循环平稳的感兴趣基站到达角估计方法。首先针对被动接收情况下循环平稳信息无法获取的问题，提出利用接收信号获得各基站信号的循环频率信息的方法。随后提出利用感兴趣信号的循环频率增强感兴趣信号，同时抑制其他杂波干扰。最后仿真验证文中方法能够获得比常规方法更准确的到达角估计，并适用于阵列天线小于信号源个数的欠定情况。
침대복잡전장배경하，접수궤주위가능존재다개조사원，병차조사원기본신식미지，무법구분감흥취신호화간우신호，무법득도준학적감흥취기참방위신식적문제，제출기우순배평은적감흥취기참도체각고계방법。수선침대피동접수정황하순배평은신식무법획취적문제，제출이용접수신호획득각기참신호적순배빈솔신식적방법。수후제출이용감흥취신호적순배빈솔증강감흥취신호，동시억제기타잡파간우。최후방진험증문중방법능구획득비상규방법경준학적도체각고계，병괄용우진렬천선소우신호원개수적흠정정황。
Because in the unknown complex battlefield environment,there may be multiple illuminators around the receiver,the basic information on the illuminator is unknown,and it is impossible to distinguish between interested and interfering signals,so that it is impossible to obtain accurate direction information on the interested station,we propose a cyclostianarity-based direction of arrival estimation method.First,for unknown cyclostiaonarity in the passive bistatic radar,we propose to use the cyclic autocorrelation function of the received signal to obtain cycle-frequency information on each base station signals. Then the cyclostianarity of the signal of interest is applied to enhance the signal of interest,while suppressing other clutters.Finally, the simulation method verifies that the proposed method can obtain more accurate direction estimation than the conventional method,and that it is also applicable to the underdetermined case where the number of antennas is less than the number of sources.