CAJ | 학술논문

现代战场电磁环境复杂，不同类型电磁信号在时频域碰撞混叠，现有常规侦察手段对此类信号的定位应用受到严重制约。双星时差频差定位体制通过互模糊函数求解信号到达时差和频差，分离频域混叠信号并获得高达公里量级的定位精度，非常适合于复杂电磁环境下的应用。通过求解模糊函数的方法分析了时差频差体制对频域混叠信号的分离和定位能力，然后结合美航母编队及其电磁环境构成，探讨了这一能力在监视航母编队，尤其是跟踪识别编队个体成员的具体应用。仿真与分析结果证明了双星时差频差定位体制的优势，对于天基侦察系统的建设具有重要意义。
현대전장전자배경복잡，불동류형전자신호재시빈역팽당혼첩，현유상규정찰수단대차류신호적정위응용수도엄중제약。쌍성시차빈차정위체제통과호모호함수구해신호도체시차화빈차，분리빈역혼첩신호병획득고체공리량급적정위정도，비상괄합우복잡전자배경하적응용。통과구해모호함수적방법분석료시차빈차체제대빈역혼첩신호적분리화정위능력，연후결합미항모편대급기전자배경구성，탐토료저일능력재감시항모편대，우기시근종식별편대개체성원적구체응용。방진여분석결과증명료쌍성시차빈차정위체제적우세，대우천기정찰계통적건설구유중요의의。
In modern warfare, battlefield has complicated electromagnetic environment, where various elec-tromagnetic signals collide with each other in all probability. It's very difficult for ordinary intelligence, sur-veillance and reconnaissance( ISR) systems to positioning these interlaced signals in frequency domain. The dual-satellite geolocation system using time difference of arrival ( TDOA) and frequence difference of arrival ( FDOA) , which calculates the TDOA and the FDOA by crossing ambiguity function, can separate all inter-laced signals in frequency domain and locate them with high accuracy up to kilometer level. It shall be suit-able for applications in complicated electromagnetic environment. This paper analyzes the separation and po-sitioning capability of TDOA/FDOA scheme for interlaced signals in frequency domain by the method of sol-ving ambiguity function,and then,according to the composition of U. S. carrier battle group and its electro-magnetic environment, discusses the application of this capability in observing carrier battle group, especial-ly tracking and identifying individual member of carrier battle group. Simulations and analysis prove the ad-vantage of this system and it is of great significance for constructing China's space-borne ISR system.