CAJ | 학술논문

认知雷达是下一代雷达发展的方向之一。在对认知跟踪反馈环进行分析的基础上，提出了一种线性调频( LFM)信号波形库的建立方法。在应用交互多模型跟踪机动目标的背景下，通过所建的波形库对发射波形进行实时调用，达到减小跟踪误差的目的。研究了具有不同调频率参数与Fr-FT旋转角度组合的不同数量LFM信号波形库的建立，以最小化模型选择不确定性为目的推导波形选择准则，得到了不同的波形选择策略。仿真验证分析其跟踪精度可以看出，构建具有一定数量LFM波形的波形库可以提高认知跟踪雷达的性能。
인지뢰체시하일대뢰체발전적방향지일。재대인지근종반궤배진행분석적기출상，제출료일충선성조빈( LFM)신호파형고적건립방법。재응용교호다모형근종궤동목표적배경하，통과소건적파형고대발사파형진행실시조용，체도감소근종오차적목적。연구료구유불동조빈솔삼수여Fr-FT선전각도조합적불동수량LFM신호파형고적건립，이최소화모형선택불학정성위목적추도파형선택준칙，득도료불동적파형선택책략。방진험증분석기근종정도가이간출，구건구유일정수량LFM파형적파형고가이제고인지근종뢰체적성능。
Cognitive radar is one of the main trend in radarˊs development. A method of building a LFM-waveform library is proposed on the basis of analyzing the feedback in cognitive tracking loop. By applying the interact multiple model ( IMM) algorithm in tracking maneuvering target, waveforms in the library are called timely so as to reduce tracking errors. Waveforms library is built by different combinations of chirp parameters and FrFT rotating angles, the waveform selecting rule is derived through the principle of mini-mum modelˊs uncertainty, and different selection strategies are obtained. Through analyzing the precision of tracking,the conclusion is drawn that the library of certain amount LFM-waveforms can improve the property of cognitive tracking radar.