| 题名 | 水声定位标定系统中的信号检测技术研究 |
| 作者 | 严鹏 |
| 学位类别 | 博士 |
| 答辩日期 | 2008-05-30 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 声学研究所 |
| 关键词 | 水声定位系统 定位精度 Lenner滤波器 Notch滤波器 瞬时频率序列方差检测器 复相关 |
| 其他题名 | The research signal detection technology of the Acoustic Position System |
| 学位专业 | 信号与信息处理 |
| 中文摘要 | 水声定位技术是水下定位导航的主流技术，近年来得到了很大的发展，比较典型的应用系统有：长基线定位系统，短基线定位系统，超短基线定位系统和水下弹道测量系统等。定位精度是这些水声定位应用系统的核心指标。影响定位精度的因素非常多，如外围传感器的精度、系统结构设计和系统工作环境等，所以需要对水声定位系统进行大量的标校工作。 由于水声定位系统标定的需要，有必要研制出一种可以标定出不同类型的水声定位系统的实时工作精度以及通过分析数据来改进和提高水声定位系统的定位精度的定位标定系统。 本论文的任务就是对一个高精度的水声定位标定系统中的信号检测技术进行研究，研究内容主要是接收并处理水声信号，找出有效的探测脉冲，并估计脉冲的频率和时延等参数。根据信号的特点，选取了Lenner滤波器阈值判断、Notch自适应滤波器和VIFD联合判断以及复相关检测三种算法，建立仿真模型对三种信号检测算法分别进行仿真以及用实际的海试数据来选出一个比较合适的算法，保证标定系统的标定精度，满足指标的要求。 |
| 英文摘要 | The acoustic positioning technique has undergone great development in underwater navigation in recent years. Its typical applications include LBL(long baseline positioning system), SBL(short baseline positioning systems), USBL(ultra-short baseline positioning systems) and underwater trajectory measurement systems. As a key indicator in acoustic positioning, positioning accuracy is one of the core parameter of these acoustic positioning system. Positioning accuracy, can be affected by many factors, such as the external sensor accuracy, system architecture design and operation of the system environment, and it is usually indispensible to carry out vast calibration on these systems. In acoustic positioning system calibration, it is necessary to develop an acoustic positioning system, which can figure out the real-time precision for different types of systems, thus improvement of positioning accuracy can be achieved through the analysis of data. In this paper, the signal detection technology of a high-precision calibration of acoustic positioning system is explored. An algorithm to receive and process acoustic signals, to identify effective detection pulse, and to estimate the frequency and pulse parameters such as delay is needed. According to the signal characteristics, three candidates algorithms, threshold judgment through Lenner Filter Banks, Notch adaptive filter and VIFD(Variance of Instaneous Frequency Detector), and complex correlation detection, have been selected and tested. To maximize the accuracy and fulfill other parametric requirements of the system, simulation models are established on these selected algorithms, and data analysis work is done basing upon vast sampling. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 64 |
| 内容类型 | 学位论文 |
| 源URL | [http://159.226.59.140/handle/311008/430]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 严鹏. 水声定位标定系统中的信号检测技术研究[D]. 声学研究所. 中国科学院声学研究所. 2008. |
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