盲均衡技术在地震信号反褶积中的应用  

Application of blind equalization algorithm in seismic signal de-convolution processing

作　　者：李艳琴[1] 张立毅[2,3] 张锦[4] 安然[3] 

机构地区：[1]防灾科技学院防灾仪器系,北京101601 [2]天津大学电子信息工程学院,天津300003 [3]天津商业大学信息工程学院,天津300134 [4]山西医科大学第一医院设备科,山西太原030023

出　　处：《计算机工程与设计》2012年第11期4412-4415,共4页Computer Engineering and Design

基　　金：中央高校基本科研业务费专项基金项目(ZY 20120210、ZY 20120104);防灾减灾青年科技基金项目(200909);山西省自然科学基金项目(2011011015-3)

摘　　要：为了消除地震反射系数的影响,有效提取地震子波,提出一种基于最小均方误差准则的SIMO系统的盲均衡算法,该算法利用接收数据的截短协方差矩阵设计了直接均衡器,该方法是盲均衡算法在地震信号处理中的应用,避免传统反褶积运算中对称正定矩阵的限制,从而改善了算法的稳定性并提高收敛速度。计算机仿真表明,新算法可获得较优的地震子波,从而再利用地震子波对反射系数进行分析,并且具有很快的收敛速度。In order to eliminate the impact of seismic reflection coefficient and effectively extract seismic waves, a seismic blind equalization algorithm for SIMO systems based on minimum mean ,square error criterion is proposed. The algorithm uses the trtmcated covadance matrix of the received data to design the direct blind equalizer. The method is a novel application in the seismic signal processing. The novel algo rithm avoids the constraints of symmetric positive definite matrix, and the stability of the algorithm and convergence speed is improved. Corn puter simulations demonstrate the novel algorithm can obtain the better seismic wavelet. Then, the reflection coefficient based on the obtaining seismic wavelet is analyzed, and the algorithm possesses quicker convergence speed.

关 键 词：盲均衡 地震反褶积 地震子波 反射系数 截短协方差矩阵 

分 类 号：TN911.4[电子电信—通信与信息系统]