ISAR成像中MTRC校正的新插值算法  

New Interpolation Algorithm of MTRC Compensation Algorithm in ISAR Imaging

作　　者：李栋[1] 李建周[1] 齐玉涛[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129

出　　处：《计算机仿真》2012年第11期268-271,共4页Computer Simulation

基　　金：陕西省自然科学基础研究计划(2009JM8001-2);西北工业大学基础理论研究(NPU-FFR-JC201039)

摘　　要：研究雷达成像优化问题,在雷达成像中,双线性插值方法是一种常用、而且高效的校正散射点越分辨单元走动(MTRC)现象的插值算法,但由于其插值精度不高,会产生图像模糊的问题。为解决上述问题,采用目标回雷达波数据结构,并借鉴双线性插值方法进行仿真试验,提高了插值的精度,改善最终成像质量。通过对不同目标进行成像,验证所推导出的新的插值格式,不仅对越分辨单元走动现象有良好的校正能力,而且与应用双线性插值方法所取得的雷达成像仿真结果相比较,使用所推的双线插值格式所得结果更加清晰。针对复杂目标的仿真结果表明,改进插值格式能很好地适用于复杂目标的成像计算,具有较好的实用性。In radar imaging, the bilinear interpolation method is a common and efficient interpolation algorithm of correcting Migration Through Resolution Cell （MTRC）. However, due to its low interpolation accuracy, blurred ima- ges can be produced. To overcome this problem, drawing on the structure of target radar data and the ideas of the bi- linear interpolation method, a new method was derived in this paper, which can improve the interpolation accuracy and the quality of the final image. The simulations of different targets have demonstrated the high MTRC calibration a- bility and more clearer simulation picture of this method. The simulation results of the complex target show that such interpolation format can be well applied in imaging calculation of complex targets, and has good engineering practica- bility.

关 键 词：雷达成像 散射点越分辨单元走动 双线性插值算法 复杂目标 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]