A hardware efficient implementation of frequency estimation based on complex correlation method
XU Wei-jie · Shengxue jishu · 2009
Complex correlation method is applicable to the Doppler frequency shift measurements through selecting FPGA as a hardware platform to meet the actual work of the Doppler frequency shift measurement.According to this Complex correlation method and the characteristics of hardware platforms,the arctangent,low pass filter and orthogonal converter have been optimized,so that the consumption of hardware resources is reduced.By use of the stored values in advance,the highly effective arctangent algorithm can omit the arctangent operation each time.Optimized low pass filter and orthogonal converter further save the search table(LUT) resources.The simulation experiment associated with the data quality assurance and the control algorithm verifies the feasibility of the hardware platform.