Target source detection technology has been widely applied in the fields of military, aviation, and navigation, etc. In order to enable students to master target source detection technology, it is necessary to be applied to the practical education of students. In the paper, one method of planar target source detection based on the time delay estimation and the sensor placed in a line is analyzed. To verify the reliability of the implementation of planar target source detection technology under laboratory conditions, with the aid of INV acceleration sensor, INV signal acquisition instrument and DASP analysis software, the detecting experiment of vibration target source on the plane was carried out by using the target source detection method that has been analyzed. The results of experiment showed that the relative errors of the distance and direction angle between the detected target and each sensor are less than 9%.

The aliasing error resulted from truncating signals incoherently is one of main spectrum errors. The investigation on the error remains quite limited. This restricted the development of high accuracy spectrum analysis. This work discussed the truncation effect and the corresponding aliasing error in quantity, and revealed its dependence upon the truncation conditions. Then a concise technique was proposed to suppress the truncation aliasing error of DFT spectrum by modifying the first datum of the digital signal in time domain. Under general truncation conditions, the simulations show that the error correction of the 5 spectral lines near the main lobe is effective and the maximum absolute error of the main spectral line is decreased from ±2.4‰ to ±0.5‰.