Description: 介绍了一种基于锁频锁相环(FPLL)的载波跟踪算法。频率跟踪模块可以适应较大动态范围的频率变化，基于软件的数控振荡器(NCO)模块可以达到极高的频率跟踪精度。由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。因此，该基于FPLL的载波跟踪算法可以适应信号存在较大的动态范围和噪声干扰的应用环境；同时，其鉴频鉴相算法表达式简单，易于用可编程数字器件实现。-Introduce an approach based on frequency-locking phase-locked loop (FPLL) carrier tracking algorithm. Frequency tracking module can adapt to a larger dynamic range of the frequency change, software-based numerical control oscillator (NCO) module can achieve the very high frequency tracking accuracy. Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking. Therefore, the FPLL carrier-based tracking algorithm can be adapted to signal the existence of a larger dynamic range and noise of the application environment at the same time, the PFD algorithm expression is simple, easy to use programmable digital devices. Platform: |
Size: 162816 |
Author:何宁 |
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Description: GPS信号的基带处理在IEEE发表的文章有关信号捕获和跟踪的-GPS baseband signal in the IEEE published articles related to signal acquisition and tracking of Platform: |
Size: 103424 |
Author:刘旭东 |
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Description: GPS信号的基带处理在IEEE发表的文章有关信号捕获和跟踪的-GPS baseband signal in the IEEE published articles related to signal acquisition and tracking of Platform: |
Size: 2856960 |
Author:刘旭东 |
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Description: A context-aware system is one that gracefully adapts to user
environment changes, rendering its applications/services more personalized.
Location has been long considered as the most important context
and numerous Location Based Services have been introduced. Proximity
detection is considered as a high level proactive location based function
that detects proximity between two mobile users. This function is needed
in diverse applications such as dating services, gaming and child tracking.
This paper presents Direction-based Dynamic Shifted Circle (DDSC)
approach which takes users direction as context in providing an efficient
proximity detection technique. Simulation experiments proved that DDSC
outperforms similar algorithms that have been introduced in literature
previously, in terms of the number of messages exchanged. Platform: |
Size: 689152 |
Author:serag |
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Description: 高动态GPS信号的快速捕获与跟踪方法研究，为系统设计提供依据-High Dynamic GPS Signal Acquisition and Tracking Method for Rapid, in order to provide a basis for system design Platform: |
Size: 1797120 |
Author:党秀 |
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Description: 用泰勒级数展开的形式表示高动态的载波相位参数, 给出了对高动态载体和各阶频率参数
估计的四阶加权扩展卡尔漫滤波器(EKF) , 以及实现高动态跟踪滤波器必须的状态转移矩阵和动
态噪声协方差矩阵. 计算机模拟实验分析了对载波相位和各阶频率的跟踪结果.-Taylor series expansion with the form that the carrier phase high-dynamic parameters, given the high-order dynamic frequency carrier and the fourth-order parameter estimation Carl diffuse filter weighted extended (EKF), and to achieve the necessary high dynamic tracking filter state transition matrix and dynamic noise covariance matrix. The computer simulation analysis of carrier phase and frequency tracking results of each order. Platform: |
Size: 256000 |
Author:herui |
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Description: 鉴于载波相位观测量可提供高精度定位信息的特点,分析了在高动态环境获得载波相位观测量的三种可
能方法,对三种方法的估计精度和动态跟踪能力进行了比较. 提出了一种适合GPS 系统的高动态环境载波相位
测量方案.-View of the carrier phase measurements can provide accurate location information, analyzes the dynamic environment in the high carrier phase measurements to obtain three possible methods, three methods of estimation accuracy and dynamic tracking ability was compared. Presents a GPS system for high dynamic carrier phase measurement program. Platform: |
Size: 267264 |
Author:herui |
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Description: 该载波同步方案可应用于低信噪比和高动态同存的条件下
接收机设计中,通过对该方案进行MATLAB 仿真,结果表明了该方案能有效地解决了载波快速捕获与精确跟踪的
问题。-The carrier synchronization scheme can be applied with low SNR and high dynamic receiver design under the conditions of existence, through the program MATLAB simulation results show that the scheme can effectively solve the fast carrier capture and accurate tracking of the problem . Platform: |
Size: 386048 |
Author:herui |
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Description: 高动态给载波的跟踪带来了很大的困难,本文研究采用锁频环( FLL) 和锁相环( PLL) 相结合的方法来实现
载波跟踪-High dynamic to the carrier' s tracking has led to great difficulties, this paper uses frequency-locked loop (FLL) and phase-locked loop (PLL) methods to achieve a combination of carrier tracking Platform: |
Size: 181248 |
Author:herui |
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Description: 《深空微弱高动态信号捕获与跟踪算法研究与实现》深空通信领域载波同步恢复需要初步了解，其中信号多普勒斜率动态特性分析和解决办法值得借鉴。-"Weak deep-space high dynamic signal acquisition and tracking algorithm research and to achieve" deep space communications field carrier synchronization recovery requires a preliminary understanding of where the signal Doppler slope of the dynamic characteristics analysis and the solution is worth learning. Platform: |
Size: 2079744 |
Author:yangyi |
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Description: anburn 大学 学位论文：主要研究了各种GPS软件接收机中的高动态跟踪算法-A thesis of anburn university : mainly on kinds of tracking algorithm in high dynamic GPS software receiver Platform: |
Size: 3005440 |
Author:xiaoxiao |
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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:
由于载体对象的高动态特点，其上装载的GNSS 接收机在捕获信号和跟踪定位上面临很大的挑战，因此致使 GNSS/INS 组合系统的定位效果受到严重影响。本论文以 MEMS IMU/GNSS 超紧组合为研究目标，并以 MEMS IMU 环路辅助的GNSS/INS 紧组合技术为研究重点，深入研究了 MEMS IMU 辅助的 GNSS 信号捕获、MEMS IMU 辅助的 GNSS 信号跟踪、MEMS IMU 辅助的 GNSS/INS 紧组合导航定位算法和基于矢量跟踪结构的 GNSS/INS 超紧组合算法，旨在改善MEMS IMU/GNSS 组合导航系统在卫星信号衰减场合中的性能。
-High dynamic characteristics of the carrier object loaded on GNSS receivers face a lot of challenges in the capture of the signal and track positioning on GNSS/INS positioning effect of the combined system, therefore resulting in severely affected. This thesis, MEMS IMU/GNSS super tight combination of research objectives, and to the MEMS IMU loop auxiliary GNSS/INS tight combination of technology with a focus on in-depth study the MEMS IMU Assisted GNSS signal acquisition, MEMS IMU auxiliary of GNSS signal tracking , the MEMS IMU Assisted GNSS/INS tightly integrated navigation positioning algorithm based on the structure of vector tracking GNSS/INS the super tight combination algorithm, designed to improve the performance of MEMS IMU/GNSS integrated navigation system of the satellite signal attenuation occasions. Platform: |
Size: 22207488 |
Author:LeeYJ |
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Description: 高动态GPS接收机载波跟踪算法研究与实现
里面有各种参数的设计与选择 这篇文章讲的比较详细-High dynamic GPS receiver carrier tracking algorithm to achieve
The design and selection of various parameters of this article talking about a more detailed Platform: |
Size: 1438720 |
Author:余玉揆 |
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Description: 基于凸极追踪的思想，讨论了两种高频信号注入法——旋转高频电压信号注入法和脉动高频电压信号注入法在永磁同步电机无位置/速度传感器运行控制中的应用。分别介绍了两种高频信号注入法的转子位置自检测原理，指出了两种方法实现中的技术关键，并应用这两种位置自检测方法建立了永磁同步电机无传感器矢量控制系统的仿真模型，进行了仿真比较。对比结果表明，采用脉动高频电压信号注入的凸极跟踪系统结构简单，静、动态调速性能较好；但采用旋转高频电压信号注入法的系统更易于实现。-Based on the idea of salient pole tracking, the two high-frequency signal injection method- rotating high-frequency voltage signal injection method and pulsating high frequency voltage signal injection method in the operation control of permanent magnet synchronous motor position/speed sensor. Introduced the rotor position of the two high-frequency signal injection method since the detection principle, pointed out that the key technology in two ways, and the application of these two positions since the detection methods to establish a permanent magnet synchronous motor sensorless vector control system simulation model for the simulation comparison. The comparison results show that the pulse of high-frequency voltage signal injection Salient tracking system is simple, static, dynamic speed performance However, the system of rotating high-frequency voltage signal injection method is easier to implement. Platform: |
Size: 336896 |
Author:林弯弯 |
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Description: 在有限的实验条件下，为验证高动态软件GPS接收机信号的捕获和跟踪模型，提出了一种基于软件GPS
接收平台的高动态GPS数字中频信号模拟方法。介绍了软件GPS接收平台的基本结构框架，并根据高动态环境
下伪随机码的多普勒效应及本地振荡器的频率误差对接收信号的影响，推导并建立了一种较精确的高动态GPS
数字中频信号模型。为使模型适用于更加复杂的环境，通过设置接收信号的噪声幅值来调整信噪比大小，以确
定所需的信号强度；在信号参数的设置过程中调整入射信号与反射信号的幅度比值及反射信号的时间延迟参
数，以模拟不同程度的多路径效应对中频信号的影响。仿真结果表明了该方法的有效性。-In order to validate the model for capturing and tracking the high dynamic signal of the software GPS
receiver on limited experiment condition, a method for modeling the high dynamic numeric IF signal was presented
based on the software GPS receiver platform. The basic frame of the software GPS receiver platform structure was
introduced, and according to the impact of the Doppler effect of the pseudo-noise code and the frequency error of the
local oscillator on the received signal in high dynamic environment, a more precise model of high dynamic GPS
numeric IF signal was deduced and established. To make the model be applicable in more complicated environment,
the required intensity of the signal was obtained by setting the noise’s magnitude of the received signal and adjusting
the Signal-to-Noise ratio. In the process of setting the signal parameters, the ratio of the incident signal’s magnitude to
the reflected one and the time delay of the reflected signal were adjust Platform: |
Size: 721920 |
Author:luchan |
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Description: 提出了一种基于电网电流反馈内环和重复控制外环的双闭环控制策略。利用数字控制固有的一拍延时特性，设计了控制系统内环，实现LCL 滤波器的稳定控制；根据内环闭环传递函数特性，设计了相应陷波器、二阶滤波器以及超前环节作为控制系统外环；同时，引入了给定前馈和电网电压前馈控制环节来抑制电网电压对系统的影响，以增强系统的动态性能。理论分析和实验结果表明，该方法使LCL 型并网逆变器具有稳态精度高、动态性能好以及抗干扰能力强的优点。(the repetitive dual closed-loop control strategy based on grid current feedback was proposed in this paper. The LCL filter was stable due to effective utilization of inherent one-beat delay of digital control. Based on the inner closed-loop transfer function, the corresponding notch filter, the second-order filter and lead-link were designed as a compensator of epetitive control. The gird voltage and current reference feed-forward control suppressed grid disturbance and increased dynamic tracking performances. Theoretical analysis and experimental results show that, the proposed method has the advantages of high steady accuracy, fast dynamic response and strong robustness.) Platform: |
Size: 1813504 |
Author:罗伊斯彭
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Search - high dynamic tracking