A detecting method for the phase drift in excited signals based on wavelet packet analysis is presented.

To enhance the reality and effectiveness of vibration stimulation test,it is necessary to generate random driving signals with non-Gaussian distribution.

The driving signal can use any periodic signal and its signal-to-noise ratio is very low.

Iterative excitation signal design for closed-loop system identification;

By changing transmission aperture and adjusting delayed time of electric excitation signal applied to every transmission elements,not only can the variable focal length be obtained,but also the same acoustic power can be kept in every focusing position.

The domestic and overseas research status of nondestructive detecting in rock bolts are discussed from the aspects of excitation signal and information processing technology.

Effect of drive signals of pump on the sensitivity of piezoelectric fluidic gyro;

Back Projection Imaging I、Q Realization of Impulse Signal SAR;

The relation between BP s azimuth resolution and azimuth angle as well as signal s center frequency is discovered when the radar s transmitted signal is one kind of impulse signal based on the characteristic of the impulse SAR imaging.

This paper discusses the circuit\'s response under the singular signal(as impulse signal for example).