为将Burg算法应用在汽车测速中, 在多普勒效应原理的基础上, 推导出移动物体发射波频率与接收波频率之间的关系, 并分别用直接法和Burg算法估计测速模型中发射波频率82 Hz与接收波频率81 Hz。经Matlab仿真表明: 直接法估计的发射波与接收波主频率分别接近于82 Hz和81 Hz, 但频率主峰旁边存在大量噪声频率的假峰；Burg算法估计出的发射波与接收波主频率更准确, 同时主峰清晰且较其他噪声频率突出明显。故Burg算法对间隔不大的发射波与接收波的频率分辨力远远优于直接法, 可应用于测速环境中。

In order to apply Burg algorithm in the vehicle speed measurement environment, based on the principle of Doppler effect, the relationship between the transmitted wave frequency and received wave frequency of moving vehicles is derived, then the transmitted wave of 82 Hz and received wave of 81 Hz are estimated with the direct method and the Burg algorithm respectively in the vehicle speed measurement model. The Matlab simulation shows that the estimated values of transmitted wave and received wave are separately close to 82 Hz and 81 Hz by the direct method, but there are a lot of false peaks of noise frequency near the peak frequency. The estimated values of transmitted wave and received wave are accurate by the Burg algorithm, and the main peak is clear and prominent than other noise frequencies. Therefore, the Burg algorithm performs better than the direct method in resolving the frequency difference which is small between the transmitted wave and received wave, and it can be applied to the speed measurement environment.