中文摘要：

软件化雷达PPI光栅显示需完成极坐标测量数据向直角坐标的实时转换，而传统的利用简单数学公式直接转换的方式存在映射非均匀和运算量大等难题。基于整体映射和一一映射等不同逆映射方法，研究并提出了一种改进的一一映射新方案。新方法可有效解决量化漏点和区域重叠的问题，显著提高了映射查找表的形成效率，保证了PPI显示效果和实时性。最后，给出了新方法的具体实现流程，比较了与现有方法的效果，证明了新方法的有效性。

英文摘要：

It is necessary for PPI raster display of software radar to real-time transfer the real measuring data from polar coordination into Cartesian coordination. However, the direct transform via mathematical formula may cause the problems like non-uniformly mapping and large computational burden. Based on exist- ing inverse mapping methods like unitary mapping and one-to-one mapping, a novel mapping solution is pro- posed in this paper based on the modification of one-to-one mapping. The proposed method can effectively solve the missing points and regions overlapping. Also, the forming efficiency of mapping table is improved remarkably to ensure the real-time PPI raster display, and the detailed implementation is further presented for this method. Finally, the effectiveness of the proposed method is demonstrated by the performance com- parisons among different solutions.