Simulation and research on the ternary pseudorandom scanning signal to vibroseis
Ling‐Yun Wu, Yang Xuan, Yicheng Liu · 2011
Vibroseis technology is one kind of important techniques for seismic exploration, and scanning technique is a vital part of vibroseis. The main factor on affecting the resolution and Signal to Noise ratio of vibroseis is the shape of scanning signal's autocorrelation. Therefore, it is the best way to enhance the effect of seismic exploration through improving performances. In this paper, according to the characteristics of vibroseis and the effect of scanning signals it was researched how to generate the ternary pseudo-random code. The ternary pseudo-random scanning signals based on pseudo-random codes are given, and scanning signals of the ternary pseudo-random are simulated and analyzed. The relationships of an autocorrelation function and the order of primitive polynomials and the carrier frequency are gotten by simulated results. Furthermore, it provides corresponding theoretical basis and the scanning signals which is suitable to seismic exploration for improving vibroseis' performance .Thus it has a good researching value and applied prospect.