软件卫星接收机技术及实验研究

发布时间：2018-01-28 10:17

本文关键词： 软件接收机捕获跟踪算法优化滤波　出处：《南京理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着硬件卫星接收机技术的日益成熟,目前导航定位接收机的研究热点逐渐转移到了软件卫星接收机,而随着我国北斗二号卫星的成功建设,掌握拥有自主知识产权的接收机核心技术也势在必行。软件卫星接收机除了能实现硬件卫星接收机的常用功能,还能为商业硬件接收机的开发和性能优化作研发依据,因此,对软件接收机的关键技术进行优化设计作为一项基础知识的研究,有着一定的应用前景。本论文在简要介绍了卫星导航定位的原理后,对软件卫星接收机的关键技术进行了详细的分析,比较了经典热门算法,并在此基础上进行了优化。主要分析和优化了捕获环节和跟踪环节的算法：总结了串行搜索法、并行搜索法等的优缺点,并且将比特分割算法与差分相关算法进行了更好的组合,能针对微弱信号进行良好的捕获；总结了码跟踪和载波跟踪的原理,针对载波跟踪的环路滤波器进行了分析设计,并且通过仿真分析,验证了加入惯性辅助和卡尔曼滤波技术的载波环具有良好的动态跟踪效果。最后,使用了通用的高性能的接收机芯片MAX2769和带有微处理器的USB芯片CY7C68013,对接收机中的硬件部分——中频前端进行了合理设计。分别进行了静态和动态实验,采集了中频数据,使用优化的算法对中频数据进行处理,并与高精度的硬件接收机输出数据进行对比,验证了算法的可行性；在对定位数据进行滤波处理后,可得出符合用户精度需求的位置信息。
[Abstract]:With the development of hardware satellite receiver technology, the research focus of navigation and positioning receiver is gradually transferred to software satellite receiver, and with the successful construction of Beidou 2 satellite in China. It is also imperative to master the core technology of the receiver with independent intellectual property rights. The software satellite receiver can not only realize the common functions of the hardware satellite receiver. It can also be used as the basis for the development and performance optimization of commercial hardware receivers. Therefore, the optimization design of the key technologies of software receivers as a basic knowledge has a certain application prospects. After a brief introduction of the principle of satellite navigation and positioning, the key technologies of the software satellite receiver are analyzed in detail, and the classical popular algorithms are compared. And on this basis, the optimization. The main analysis and optimization of the capture and tracking links of the algorithm: summed up the serial search method, parallel search method and so on advantages and disadvantages. The bit segmentation algorithm and the differential correlation algorithm are combined better, which can capture the weak signal well. The principles of code tracking and carrier tracking are summarized. The loop filter of carrier tracking is analyzed and designed, and the simulation analysis is carried out. It is verified that the carrier loop with inertial assistant and Kalman filter has good dynamic tracking effect. Finally. The general high performance receiver chip MAX2769 and the USB chip CY7C68013 with microprocessor are used. The hardware part of the receiver, if front-end, is designed reasonably. The static and dynamic experiments were carried out, the if data were collected, and the if data were processed by the optimized algorithm, and compared with the output data of the high precision hardware receiver, the feasibility of the algorithm was verified. After filtering the location data, the location information can be obtained.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN965.5

【参考文献】