基于FPGA的反正切函数的优化算法

The Design and optimization of arc tangent calculate circuit based on FPGA

主要描述了一种基于FPGA利用Verilog HDL实现的反正切函数计算的优化算法。反正切函数的计算在相位检测,偏振光检测等检测系统有重要的应用。讨论了泰勒展开式法和直接LUT查找表法缺点,提出一种新的优化LUT查找表算法。该算法能够被综合器综合实现,可以直接集成在FPGA应用系统、SOC系统或SOPC系统上,并且经软件仿真和硬件验证,达到了设计要求。

This paper mainly describes an Design and optimization of arc tangent calculate circuit based on FPGA. Arc tangent calculation is vital in such systems for phasic detection ,polarizable optic detection. The flaws of Taylor launched and LUT are discussed, a optimized algorithm for LUT is presented. This algorithm would be completed by integrative unit, integrated on FPGA SOPC circuit system. Software simulation and hardware experiment have been done for this algorithm, the results demonstrate the algorithm is suitable for our project.