文章摘要
徐世军,许伟杰.复相关法测频的硬件实现[J].声学技术,2009,(2):180~183
复相关法测频的硬件实现
A hardware efficient implementation of frequency estimation based on complex correlation method
投稿时间:2008-08-29  修订日期:2008-12-03
DOI:
中文关键词: 多普勒频移  复相关  反正切  正交变换
英文关键词: Doppler shift  complex correlation  arc tangent  orthogonal transform
基金项目:
作者单位E-mail
徐世军 中国科学院声学研究所东海研究站, 上海, 200032 xsj10243388@163.com 
许伟杰 中国科学院声学研究所东海研究站, 上海, 200032  
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中文摘要:
      复相关算法适用于多普勒频移的测量,通过选用FPGA作为硬件实现平台,可以满足实际的多普勒测频工作。根据复相关算法测频原理和硬件平台的实际特点,分别对反正切、低通滤波器和正交变换进行了优化,降低了硬件的消耗。高效的反正切函数算法通过预先存入值省去了每次反正切函数的运算,优化的FIR滤波器和正交变换器进一步节约了查找表(LUT)资源。通过仿真实验,结合数据的质量保证和控制算法,结果验证了硬件平台的可行性。
英文摘要:
      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.
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