地震勘探技术在地震学研究的有关领域中起着重要作用,地震数据处理正确与否,直接影响了解释的准确性与精确度。为了验证动校正速度对最终叠加剖面的影响,对实际某地区的地震资料处理分析,最终得到了最佳动校正速度的叠加图像。实验结果...地震勘探技术在地震学研究的有关领域中起着重要作用,地震数据处理正确与否,直接影响了解释的准确性与精确度。为了验证动校正速度对最终叠加剖面的影响,对实际某地区的地震资料处理分析,最终得到了最佳动校正速度的叠加图像。实验结果表明,选择正确的动校正速度改善了叠加剖面图的信噪比。同时,选择最佳的动校正速度是得到信噪比高的图像的必要选择,这对现实中处理野外采集的地震数据处理有一定的借鉴作用。Seismic exploration techniques play a crucial role in seismic research, directly affecting the accuracy and precision of interpretation based on the correctness of seismic data processing. In order to verify the impact of different dynamic correction speeds on the final superimposed profile, seismic data processing analysis was conducted in a specific region. The optimal dynamic correction speed was finally obtained for the superposition image. The experimental results show that selecting the correct dynamic correction speed can improve the signal-to-noise ratio of the superimposed profile image. At the same time, choosing the optimal dynamic correction speed is a necessary choice to obtain high signal-to-noise ratio images, which has certain reference significance for the seismic data processing of field acquisition in reality.展开更多
针对现有正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统信道估计和迭代检测算法中频谱效率低和鲁棒性差等问题,提出了一种基于酉近似消息传递和叠加导频的信道估计与联合检测方法。首先,在软调制/解调中叠加导频...针对现有正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统信道估计和迭代检测算法中频谱效率低和鲁棒性差等问题,提出了一种基于酉近似消息传递和叠加导频的信道估计与联合检测方法。首先,在软调制/解调中叠加导频对正交幅度调制的星座点进行预处理,检测时将叠加的导频作为频域符号的先验分布,利用置信传播算法进行调制和解调,实现检测模型的简化。然后,应用因子图-消息传递算法对OFDM传输系统和信道进行建模和全局优化,引入酉变换加强信道估计算法的鲁棒性。最后,建立OFDM仿真环境对现有方法进行仿真分析。仿真结果表明,相对于现有的独立导频类算法,所提算法能够以相同复杂度显著提升OFDM系统的频谱效率和鲁棒性。展开更多
文摘地震勘探技术在地震学研究的有关领域中起着重要作用,地震数据处理正确与否,直接影响了解释的准确性与精确度。为了验证动校正速度对最终叠加剖面的影响,对实际某地区的地震资料处理分析,最终得到了最佳动校正速度的叠加图像。实验结果表明,选择正确的动校正速度改善了叠加剖面图的信噪比。同时,选择最佳的动校正速度是得到信噪比高的图像的必要选择,这对现实中处理野外采集的地震数据处理有一定的借鉴作用。Seismic exploration techniques play a crucial role in seismic research, directly affecting the accuracy and precision of interpretation based on the correctness of seismic data processing. In order to verify the impact of different dynamic correction speeds on the final superimposed profile, seismic data processing analysis was conducted in a specific region. The optimal dynamic correction speed was finally obtained for the superposition image. The experimental results show that selecting the correct dynamic correction speed can improve the signal-to-noise ratio of the superimposed profile image. At the same time, choosing the optimal dynamic correction speed is a necessary choice to obtain high signal-to-noise ratio images, which has certain reference significance for the seismic data processing of field acquisition in reality.
文摘针对现有正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统信道估计和迭代检测算法中频谱效率低和鲁棒性差等问题,提出了一种基于酉近似消息传递和叠加导频的信道估计与联合检测方法。首先,在软调制/解调中叠加导频对正交幅度调制的星座点进行预处理,检测时将叠加的导频作为频域符号的先验分布,利用置信传播算法进行调制和解调,实现检测模型的简化。然后,应用因子图-消息传递算法对OFDM传输系统和信道进行建模和全局优化,引入酉变换加强信道估计算法的鲁棒性。最后,建立OFDM仿真环境对现有方法进行仿真分析。仿真结果表明,相对于现有的独立导频类算法,所提算法能够以相同复杂度显著提升OFDM系统的频谱效率和鲁棒性。
