摘要
基于精密可控震源发射信号特性,根据能量均衡原则和信噪比最大原则,设计不同频谱的非线性扫描信号。通过灵活设计角频率—时间关系来分配不同频率的能量,有效改善发射信号的频谱特征和相关子波形态。与线性扫描信号相比,损失部分发射能量,换取分辨能力的提高,对可控震源探测具有一定实际意义。
Taking the feature of the transmitting signal of the Controlled Accurately Seismic Source(CASS)into account,the different sweep signals with different spectrum could be designed based on theenergy balance principle or maximum signal to noise ratio principle.The energy distribution ofdifferent frequency is determined by the frequency-time relationship,and the frequency-timerelationship is designed with good flexibility base on two principles.The spectrum and correlationwavelet of the designed signal would be improved.Compared with linear sweep signal,thedesigned signal loses some energy,but improves the resolution.It is meaningful for vibroseissurveying.
作者
崔仁胜
周银兴
陈阳
林湛
薛兵
王洪体
Cui Rensheng;Zhou Yinxing;Chen Yang;Lin Zhan;Xue Bing;Wang Hongti(Key Laboratory of Earthquake Prediction, China Earthquake Administration, Beijing 100036, China;Institute of Earthquake Science, China Earthquake Administration, Beijing 10036, China)
出处
《地震地磁观测与研究》
2017年第1期117-124,共8页
Seismological and Geomagnetic Observation and Research
基金
中国地震局地震预测研究所基本科研业务费专项(项目编号:2014IES0202
2015IES0307
2015IES010303)
关键词
精密可控震源
扫描信号
能量均衡
信噪比最大
分辨能力
CASS
sweep signal
energy balance principle
maximum signal to noise ratio principle
resolution capability
