Description: The Global Positioning System (GPS) includes 24 satellites, in circular
orbits around Earth with orbital period of 12 hours, distributed in six
orbital planes equally spaced in angle. Each satellite carries an operating
atomic clock (along with several backup clocks) and emits timed signals
that include a code telling its location. By analyzing signals from at least
four of these satellites, a receiver on the surface of Earth with a built-in
microprocessor can display the location of the receiver (latitude, longitude,
and altitude). Consumer receivers are the approximate size of a
hand-held calculator, cost a few hundred dollars, and provide a position
accurate to 100 meters or so. Military versions decode the signal to provide
position readings that are more accurate—the exact accuracy a
military secret. GPS satellites are gradually revolutionizing driving, flying,
hiking, exploring, rescuing, and map making. Platform: |
Size: 25600 |
Author:Divya Hiremath |
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Description: 本文是一篇模拟GPS接收机实时接收卫星信号并显示的设计论文，主要目的是模拟从GPS接收机接收数据并通过RS-232串行通信标准接口传输，然后按照一定格式显示出来。本设计主要是利用Visual C++ 强大的集成开发环境和快速创建各种应用程序的能力，创建各种图形操作界面，来编写一个实时接收并显示信息的窗体应用程序。本文介绍了GPS的一些历史和发展前景，GPS定位系统概况，GPS的数据传输码制、输出格式和Visual C++ 的发展、作用、集成开发环境和基础知识，以及完成该程序的关键技术： VC++的串口控件MSComm，最终完成了程序的编写，实现了毕业设计的要求。程序的结果是实时的显示了接收机接收来的数据。- This article is a piece of design dissertation , it simulations the GPS receiver real-time receive satellite signal and display it ,The paper mostly aims is Simulation the data received from the GPS receiver and through RS-232 Serial communication standard connection transmission , then displaying the data with certain form .This design mainly take use of the powerful collection exploitation environment of Visual C++ and the ability of double-quick establishing kinds of application, which includes very popular multimedia application and kinds of graph operation, compiles a real-time receive and the displayed information window application procedure. This article introduced GPS some history and the prospects for development, the GPS positioning system survey, the GPS data transmission code system, the output form and the Visual C++ development, the function, the integrated development environment and the elementary knowledge as well as completes this procedure the essential technology Platform: |
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Author:张利 |
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Description: 超紧耦合是 GPS/INS 组合导航系统的最新研究方向，它采用 INS 测得的载体动态信息辅助 GPS 接收机跟踪环
路，消除卫星信号中由于载体与卫星之间相对运动所产生的频率偏移，提高接收机在高动态环境下载波跟踪性能，同时还
可以压缩带宽，有效增强接收机抗干扰性能。介绍 GPS/INS 超紧耦合技术，给出 INS 辅助 GPS 载波跟踪环路结构图和相应
的数学模型，分析 INS 辅助 GPS 跟踪环路在动态环境下的动态残留及其对环路相位误差的影响，并进行了模型仿真，最后
对仿真结果进行了验证分析。仿真结果显示，辅助动态残留及其导致的环路相位误差的大小与加加速度、环路辅助时间间
隔成正比。
-The ultra-tightly coupled GPS/INS integrated navigation system latest research direction, it adopted the INS measured the carrier dynamic information auxiliary GPS receiver tracking loop to eliminate the satellite signal frequency due to the relative motion between the carrier and the satellite offset improve the receiver in high dynamic environment download wave tracking performance, but also can compress bandwidth, effectively enhance the anti-jamming performance of the receiver. Introduced GPS/INS ultra-tight coupling technology gives INS assisted GPS carrier tracking loop diagram and the corresponding mathematical model to analyze the impact of the INS assisted GPS tracking loop dynamic residues in a dynamic environment and the loop phase error, and model simulation, and analysis of simulation results verified. Simulation results show that the the residual secondary dynamic its resulting size of the error loop phase and jerk loop secondary is proportional to the time interval. Platform: |
Size: 197632 |
Author:LeeYJ |
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Description: 在GPS软件接收机和SINS辅助GPS跟踪技术的基础上,提出了一种SINS/GPS超紧致组合导航方案。该超紧致方案在GPS软件接收机的捕获环节中加入了基于相位估计的精细捕获算法,从而提高了频率捕获精度,省略了频率跟踪牵引过程 在信号跟踪环节中,利用SINS位置、速度信息与卫星参数,求取接收机与卫星之间的径向距离和径向距离率,为码环、载波环提供辅助,从而降低了载体动态变化对跟踪环的影响,提高了跟踪环的动态跟踪性能 同时,降低载波环噪声带宽,减小码环相关间隔,从而提高了载波环和码环的跟踪精度。-On the basis of the software GPS receiver and SINS assisted GPS tracking technology, ultra-compact combination of an SINS/GPS navigation scheme. The Super Compact program was added in the capture of the GPS receiver software link based the phase estimate Narrow capture algorithm, thereby improving the accuracy of frequency acquisition, frequency tracking traction process is omitted signal tracking link SINS position, speed information and satellite parameters, to strike a radial distance between the receiver and satellite and the radial distance rate, to provide auxiliary code loop, carrier loop and thereby reducing the influence of the carrier dynamic changes of the tracking loop, and to improve the dynamic tracking of the tracking loop performance while reducing the noise bandwidth of the carrier loop, to reduce the code ring associated interval, thereby improving the accuracy of the tracking of the carrier ring and the code ring. Platform: |
Size: 17408 |
Author:LeeYJ |
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Description: 根据GPS软件接收机的基本原理编写的，卫星捕获到跟踪到解算的完整程序星对用户进行定位-Been prepared in accordance with the basic principles of the GPS receiver software, satellite capture positioning to the user to track to solving the complete program Star Platform: |
Size: 2048 |
Author:hello |
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Description: 很好的GPS/INS超紧组合导航的文章，关键词：GPS,INS，超紧组合导航，抗干扰-The performance of an Ultra-Tightly Coupled
(UTC) Global Positioning System/Inertial Navigation System
(GPS/INS) is evaluated using a system simulation of the GPS
receiver and navigation processing. The UTC system being
analyzed uses a bank of pre-filters to estimate code delay error
and Doppler frequency error for each satellite. These outputs are
sent to a central Kalman navigation filter. This central processor
generates estimates of inertial navigation position, velocity, and
attitude errors IMU biases and user clock errors, which are
used to correct the navigation solution. In the UTC approach,
outputs from the central navigation processor, after projection
into satellite line-of-sight coordinates, are used to control the
code and carrier replica signals for each satellite channel. In
contrast, a conventional tightly coupled GPS/INS system uses
separate tracking loops for each satellite channel, which operate
autonomously. As a result, the UTC desig Platform: |
Size: 461824 |
Author:lili |
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Description: This paper deals with using of low-cost Global
Navigation Satellite System (GNSS) sensors in a localization
process for an autonomous guidance system of mobile robots.
Generally, this process is made using a Kalman Filter (KF) to
fuse information coming from different sensors. But as GNSS
error is an unpredictable stochastiscal process, the localization
estimated by the KF becomes unreliable. To solve this problem,
the error of a cheap GNSS receiver is analyzed. Then, an
AutoRegressive process (AR process) is used to establish a reliable
prediction model. A second problem of GNSS systems concerns
the disturbances in the observation of satellites. To detect this
disturbance, we use a condition based on the Mahalanobis
distance. This model and condition are taken into account in
the localization system to improve its Platform: |
Size: 344064 |
Author:hassan |
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Description: 用MATLAB编写求解伪距定位方程的程序，对实际数据进行处理，解算出接收机的位置及钟差信息。提供8个通道的两组数据如下，X, Y, Z 为WGS-84坐标系下各通道所跟踪卫星的坐标，Range为与之对应的校正后的伪距测量值。-Using MATLAB pseudorange positioning equation solver, and the actual data processing, solution and calculate the position of the receiver clock error information. 8 provides the following two data channels, X, Y, Z coordinates of the WGS-84 coordinate system of each channel of the satellite tracking, Range for the pseudo-range measurements corresponding corrected. Platform: |
Size: 3072 |
Author:马龙 |
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Description: GPS实施的是“到达时间差”（时延）的概念：利用每一颗GPS卫星的精确位置和连续发送的星上原子钟生成的导航信息获得从卫星至接收机的到达时间差-GPS implementation is the " time difference of arrival" (delay) concept: the use of each GPS satellite and the exact location of the satellite atomic clocks generated by the continuous transmission of information obtained from the satellite navigation receiver to the time difference of arrival Platform: |
Size: 31744 |
Author:叶生 |
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Description: 根据星历数据，求解GPS卫星位置和速度，求解位置和速度的步骤与鲁豫老师的《GPS全球定位接收机-原理与软件实现》中描述的方法一致。-According to the ephemeris data, solving the GPS satellite position and velocity, solution of position and velocity step accordding to Lu Yu teacher s method in "GPS global positioning receiver- principle and software implementation" Platform: |
Size: 4096 |
Author:cxq |
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Description: 伪距单点定位程序，最佳卫星组合选取以及接收机位置解算-Pseudorange single point positioning program, the best combination of satellite position receiver selection and calculating Platform: |
Size: 2048 |
Author:王春兰 |
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Description: 对流层误差延迟,可根据输入的卫星位置，接收机位置，及大气压等计算对流层延迟时间-Tropospheric delay, tropospheric delay time can be calculated based on the input of the satellite position, receiver position, and atmospheric pressure, etc. Platform: |
Size: 2048 |
Author:田兆 |
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Description: 基于卡尔曼滤波的GNSS卫星导航PVT解算例程，实测可用。输入参数为至少四颗卫星的XYZ坐标和伪距，输出结果为接收机经纬度值。-GNSS satellite navigation PVT Calman filter solution based routines, can be measured. The input parameters for the XYZ coordinates of at least four satellites and pseudo distance, the output for the receiver latitude and longitude value. Platform: |
Size: 8192 |
Author:btop |
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