基于Welch谱估计和能量重心法的多普勒速度测量

Doppler Velocity Measurement Based on Welch Power Spectral Estimation and Energy Centro-baric Method

在内弹道雷达测速的工程应用背景下,针对多普勒信号处理中时域法测量精度低和时-频域法处理计算量大的问题,提出了一种基于Welch功率谱估计和能量重心法的多普勒速度测量方法。在分析其基本数学原理的基础上,进行了该测量算法的计算机仿真和误差分析。仿真结果表明:在Welch功率谱分析的基础上,先利用改进的能量重心法进行多普勒频率测量,再根据多普勒原理完成运动目标的速度计算,无论有无噪声的干扰都可以达到比较高的测速精度。

Under engineering application of radar velocity measurement in interior ballistics, a measurement of Doppler velocity was presented based on Welch power spectral estimation and energy centro-baric method, which focused on the problems that are lowly measuring accuracy with time domain and large calculation with time-frequency domain in the Doppler signal processing. According to basic math principle, simulations and the accuracy analysis were conducted. The simulation results indicate that whether there is noise interrupt, higher accuracy can be achieved, which measured the Doppler frequency by improved energy centro-baric method based on Welch power spectral estimation and completed the calculation of the Doppler velocity of the mobile according to the principle of Doppler.