光学精密工程2009，Vol.17Issue(10)：2569-2575,7.
可控震源的伪随机扫描与系统测试
Pseudorandom sweeping and system testing for seismic vibrator
摘要
Abstract
To improve the resolution and Signal to Noise Ratio(SNR) of seismic signals,the sweeping mode of pseudo-random code of a seismic vibrator was investigated.The sweeping mode of binary pseudo-random code was discussed,then a new sweeping mode for ternary pseudo-random code was presented.The principle of the pseudo-random code was researched and how to generate the pseudorandom code was given.Based on the obtained pseudo-random code,a pseudo-random code sequence was designed for practical applications.Furthermore,a signal generator of ternary sweeping for the pseudo-random code was embedded into the vibrator,and tested results show that modulation frequency has significant effects on the final self-correlation results.Analysis results on self-correlation function indicate that the SNR obtained from the sweeping mode of ternary pseudo-random code has been improved by 9% as compared with that of the sweeping mode of binary pseudo-random code,which means that obtained sweeping signals are suitable for the seismic exploration.关键词
可控震源/三元伪随机序列/编码/相关噪声Key words
seismic vibrator/ternary pseudo-random sequence/code/correlation noise分类
天文与地球科学引用本文复制引用
孙锋,王忠仁,陈祖斌,樊丹丹..可控震源的伪随机扫描与系统测试[J].光学精密工程,2009,17(10):2569-2575,7.基金项目
国家自然科学基金资助项目(No.40574079 （）
No.40774097) （）
国家863高技术研究发展计划资助项目(No.2006AA09Z335) （No.2006AA09Z335）
