CAJ | 학술논문

针对目前多输入多输出（multiple-input multiple-output，MIMO）雷达中通常基于某一种而不是整体性能的波形优化问题，提出一种提高 MIMO 雷达检测和参数估计性能的波形优化方法。该方法基于提高检测概率、降低参数估计方差及抑制旁瓣3种性能约束优化发射波形相关矩阵（waveform covariance matrix，WCM）。首先推导了检测概率及克拉美罗界（Cramer-Rao bound，CRB）的等价表达式，而后联合最大化主旁瓣差约束，并对各约束条件加权，从而得到可灵活调整加权系数以满足实际应用中不同需要的波形优化问题。此波形优化问题可表示为线性规划问题，因而可高效求解。仿真实验对3种约束条件对雷达性能的影响进行了详细分析，实验结果验证了所提方法的有效性。
침대목전다수입다수출（multiple-input multiple-output，MIMO）뢰체중통상기우모일충이불시정체성능적파형우화문제，제출일충제고 MIMO 뢰체검측화삼수고계성능적파형우화방법。해방법기우제고검측개솔、강저삼수고계방차급억제방판3충성능약속우화발사파형상관구진（waveform covariance matrix，WCM）。수선추도료검측개솔급극랍미라계（Cramer-Rao bound，CRB）적등개표체식，이후연합최대화주방판차약속，병대각약속조건가권，종이득도가령활조정가권계수이만족실제응용중불동수요적파형우화문제。차파형우화문제가표시위선성규화문제，인이가고효구해。방진실험대3충약속조건대뢰체성능적영향진행료상세분석，실험결과험증료소제방법적유효성。
In multiple-input multiple-output (MIMO)systems,the waveform optimization usually focuses on certain one other than the overall performance.A novel waveform design method is proposed to improve MIMO radar’s overall performance of target detection and parameter estimation.In the proposed method,the waveform covariance matrix (WCM)is optimized under the three following constraints:improving target detec-tion probability,lowering parameter estimation variance and suppressing sidelobe.Firstly,the equivalent for-mulas of detection probability and Cramer-Rao bound (CRB)are derived.After that,with maximizing the difference between the sidelobe and mainlobe as well as weighting each constraint,the waveform optimization problem,the constraints of which can be adjusted flexibly to satisfy the practical demands,is formulated.This waveform optimization problem can be recast as a linear programming,so it can be solved efficiently.The simu-lation results verify the effectiveness of the proposed design.