基于FPGA的CSR高频控制系统相位求解模块设计

Design of Phase Computation Model for CSR RF Control System Based on FPGA

CSR高频控制系统需要对高频正弦波激励信号的幅度、相位、频率进行稳定控制。相位arctan(Q/I)求解是必不可少的模块。论述了一种新的基于FPGA平台和对称查找表法(SBTM)的求解相位arctan(Q/I)的方法,做了详细的理论分析,给出了具体实现的代码和结果。该模块精度高,消耗资源少,可直接应用于CSR高频控制系统。

CSR RF control system needs to do stable control of amplitude,phase and frequency of sinusoidal wave RF drive signal.And model for computing arctan（Q/I） is indispensable.It discusses one new way to calculate arctan（Q/I） based on FPGA platform and symmetric bipartite table method（SBTM）.Detailed theoretical analysis,VHDL codes and realization result are given.The model with high accuracy and low cost can be used directly in CSR RF control system.