罗兰-C脉冲水下传播特性高精度预测理论算法研究  

Study on the Prediction Theory and Algorithm of Loran-C Signals Propagation Characteristics Under Water

作　　者：周丽丽[1,2] 穆中林[3] 蒲玉蓉[2] 席晓莉[2] 何立风 ZHOU Li-li MU Zhong-lin PU Yu-rong XI Xiao-li HE Li-feng(College of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xi＇ an, Shaanxi 710021, China College of Automation and Information Engineering, Xi＇ an University of Technology, Xi＇ an, Shaanxi 710048, China College of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi ＇ an, Shaanxi 710038, China)

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021 [2]西安理工大学自动化与信息工程学院,陕西西安710048 [3]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《电子学报》2017年第5期1206-1210,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61401261);中国博士后科学基金(No.2016M600803);陕西省教育厅科研计划基金(No.14JK1084);陕西科技大学科研启动基金(No.BJ11-20)

摘　　要：对罗兰-C脉冲水下传播特性预测模型算法进行推导研究,综合考虑了信号先沿陆海表面、再由空气入水传播时的路径损耗、相位延迟、色散效应及空气海水界面两侧场量的约束条件.分析了0~10m不同海水深度罗兰-C电场幅度与相位的变化,并与无畸变的标准场信号进行比较.结果显示:随着入水深度增加,色散效应导致脉冲前沿展宽,跟踪点相位超前.该结果去除了由参比场量近似引入的误差,精度更高.The prediction theory and algorithm of Loran-C signals propagation characteristics under water are studied. The path loss,phase delay, dispersion effect, as well as boundary condition are all taken into account as the pulse signals propagation along the earth surface and then into the water. The amplitude and phase of the Loran-C signals in different depths （0 - 10m） of water are discussed. The predicted results by the proposed algorithm are compared to the standard ones with no waveform distortion. It is shown that due to dispersion effect, thc envelope of the waveform would broaden and the phase of the tracking point would advance as the depth of water increases. Because the error introduced by the reference fields＇ approximation is deleted,the result should be more accurate.

关 键 词：罗兰-C 水下接收 色散效应 

分 类 号：TN011[电子电信—物理电子学]