动目标异源雷达相参配准研究

Research on Coherent Compensation Method of Moving Target Under Multiple Radars

异源雷达带宽相参合成是时下的一个研究热点,相参配准是其关键和基础,但目前对动目标的研究较少。在研究动目标幅相差异的基础上,利用动目标检测(Moving Target Detection,MTD)方法在各子带估计目标速度并作速度补偿。对累加一维像依据熵最小准则求解线性相位差异的方法进行改进,保证精度前提下大大降低了计算量。构造表征雷达间相参性的相关系数,通过全局搜索求解固定相位差异。最后仿真验证了该方法处理动目标相参合成问题的有效性以及对最小熵方法改进后的优势。

Bandwidth coherent fusion technology of multiple radars is a research hotspot now.Coherent compensation is the key and foundation.But less research on moving target is made at present.The target speeds measured by each subband are estimated by moving target detection（MTD）on the basis of the research on the moving target amplitude-phase differences.Then the speeds are compensated in each subband.And linear phase difference that is estimated according to the entropy-minimization principle by accumulating range profile is mended to greatly reduce the amount of calculation on the premise of assuring precision.The fixed phase difference is solved by structuring a correlation coefficient describing radars＇ coherent via searching globally.The effectiveness of the moving target coherent fusion and the advantage of the improved minimum entropy method are proved by the simulation.