基于三元伪随机编码的可控震源信号设计

常规的可控震源Chirp扫描信号的地震响应存在着相关信号旁瓣大、分辨率低的缺点。本文针对可控震源地震勘探的特点，对伪随机编码扫描方式进行研究，并分别采用二元伪随机扫描工作方式和三元伪随机扫描工作方式进行对比，研究了二元、三元伪随机码的生成方法，利用得到的伪随机码得到实际应用的伪随机序列，并将所研制的三元伪随机编码扫描信号发生器嵌入到了具有自主知识产权的电磁驱动可控震源上，通过测试将得到的自相关函数进行分析，得到了适合于地震勘探的伪随机编码扫描信号。

Pseudorandom sweeping and system testing for seismic vibrator

Seismic response to conventional Chirp sweeping vibrator signal has the shortcomings of high side lobs and low resolution. This paper aims at vibrator seismic exploration , investigating pseudo-random encoding sweeps, then contrasting binary encoding sweep working mode and ternary encoding, building binary encoding and ternary encoding , and gaining pseudo-random list by pseudo-random code. The developed ternary pseudo-random encoding sweeps signal generator is embedded into the electromagnetic driving Vibrators with the independent intellectual property rights in the laboratory, at last we analysis auto-correlation function and gained pseudo-random coding sweep signal which can be used in seismic exploration.