提高雷达液位测量精度的频率估计算法研究

Improve the accuracy of radar level measurement frequency estimation algorithm

线性调频连续波(LFMCW)雷达液位测量系统中,回波信号的频率精确估计是实现液位测量的关键步骤.分析三谱线频偏校正法和双线性幅度(RIFE)改进法两种频率估计算法在频率估计中的优缺点及噪声对频率估计的影响.结合两者的优势,提出一种提高雷达液位测量精度的精确频率估计的优化算法,通过matlab实验仿真,该方法测量精度高、计算量小、具有实现简单、快速实时处理等优点,并且在TMS320VC5509A的DSP信号处理芯片上实现该算法应用.

Linear Frequency Modulated Continuous Wave （LFMCW） radar level measurement system, the accurate estimation of the frequency of the echo signal level measurement is to achieve a critical step. Analysis of three spectral amplitude offset correction method and bilinear Improvement method of two frequencies in the frequency estimation algorithm estimates the advantages and disadvantages of the im- pact of noise on frequency estimation. Combines the advantages of both, proposed a way to improve the accuracy of radar level measurement frequency estimation precision optimization algorithm, matlab simu- lation experiments, the method of high accuracy, small amount of calculation, with a simple and fast re- al-time processing, etc. , and in the TMS320VC5509A the DSP signal processing chip to achieve the al- gorithm.