Description: 正交频分复用基于IEEE802.11a的PTA跟踪法，同学自己编的，较复杂，运用了锁相环-Orthogonal frequency division multiplexing IEEE802.11a-based tracking method of the PTA, the students made their own, and more complex, using a phase-locked loop Platform: |
Size: 1024 |
Author:kongnan |
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Description: 在软件接收机的基础上,利用鉴频器辅助鉴相器的输出,引入一个模糊逻辑控制器,使得环路能够智能跟踪信号的动态变化.实验结果证明所提出的设计方法与传统环路相比可大幅度缩短跟踪时间,减小环路滤波器带宽,并能消除周跳.-In the software receiver, based on the use of auxiliary frequency discriminator phase detector output, the introduction of a fuzzy logic controller, the loop can be intelligent tracking signal dynamics. The experimental results demonstrate that the proposed design method with the traditional loop phase than we might have to significantly reduce the tracking time, reduce the loop filter bandwidth, and can eliminate the cycle slips. Platform: |
Size: 344064 |
Author:何宁 |
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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: 经典载波跟踪环costas环simulink建模仿真，采用QPSK调制，包含上下变频以及三种不同鉴相方式。-Classic costas loop carrier tracking loop simulink modeling and simulation, using QPSK modulation, including the upper and lower frequency, as well as phase three different ways. Platform: |
Size: 13312 |
Author:李辉 |
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Description: A Matlab script to simulate a Phase-Locked Loop (PLL). This is a type II PLL ie it has two integrators (one of these is the VCO itself).
It is simulated with an FM (frequency modulation) input. The output is the demodulated baseband signal Platform: |
Size: 1024 |
Author:Tom_M |
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Description: 使用costas环实现载波同步，绘制出了载波频率跟踪曲线-Achieve carrier synchronization using the costas loop, draw the curve of the carrier frequency tracking Platform: |
Size: 1024 |
Author:shang |
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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: 锁频环又称为自动频率控制（AFC）环，其利用反馈回路对输入频率变化进行调整，最后达到对频率的跟踪，广泛应用于雷达，卫星导航等领域对多普勒频率的跟踪。-Locked loop, also known as automatic frequency control (AFC) loop, the use of feedback loop to adjust the input frequency changes, and finally achieve frequency tracking is widely used in radar, satellite navigation and other fields on the Doppler frequency tracking. Platform: |
Size: 1024 |
Author:刀刀 |
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Description: 本程序是用matlab程序语言编写的costas环仿真程序，并对于模拟的costas环的性能进行了分析，costas环主要用于载波同步，本设计实现了对于载波频率跟踪的实现，并且给出图形对比-The program is written in matlab program costas loop simulation program, and the simulated performance of costas loop analysis, costas loop is mainly used for carrier synchronization, the design achieved the realization of the carrier frequency tracking, and gives graphic correlation Platform: |
Size: 2048 |
Author:liujiaxin |
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Description: 本书介绍了部分关键算法的VLSI有效实现结构。全书共8章,包括伪噪声序列基本理论、数字锁相环的基本原理、数字下变频器的算法设计、直接数字频率合成器的基本理论和基于有限域的数字压控振荡器、数字抑制载波跟踪环的算法设计、伪噪声序列的快速捕获算法、数字延迟跟踪环的算法设计,以及它们的VLSI结构等内容.-This book presents some of the key algorithm for VLSI effective realization of the structure. The book is Chapter 8, including the basic principles of the basic theory of pseudo-noise sequence, the digital phase-locked loop, the algorithm design of the digital down converter, the basic theory of direct digital frequency synthesizer based on the finite field of digital voltage-controlled oscillator, digital suppressed carrier tracking loop of the algorithm design, rapid acquisition of pseudo-noise sequence algorithm, digital delay in the tracking loop of the algorithm design, and VLSI architecture. Platform: |
Size: 5265408 |
Author: |
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Description: 光伏逆变器双闭环控制 电流环相位频率的跟踪
电压的前馈补偿-PV inverter dual closed-loop control of the frequency of the current loop phase tracking voltage feedforward compensation Platform: |
Size: 11264 |
Author:黄鹏程 |
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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: 设计一个LabVIEW的锁相环程序，实现频率跟踪。-LabVIEW program to design a phase-locked loop to achieve a frequency tracking. Platform: |
Size: 229376 |
Author:胡星 |
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Description: 对DQPSK调制解调技术的FPGA实现进行了比较全面的研究，利用nQpSK调制技术实现了码速20oKbps的调制器。调制载频3.2MHz、带宽18oKHz、带外抑制大于45dB，调制器设计达到预定要求。解调器硬件完成，软件未全部实现，但完成了CIC滤波器、载波跟踪环、位定时同步、并串转换等几个关键模块的设计。对解调器做了实验测试，验证了相关模块设计的正确性，解调器中重要的载波同步功能己能实现-DQPSK modulation and demodulation techniques for FPGA implementation of a more comprehensive study conducted by nQpSK modulation technique to achieve a code rate 20oKbps modulator. Modulated carrier frequency 3.2MHz, bandwidth 18oKHz, band rejection greater than 45dB, modulator design reaches the predetermined requirements. Demodulator hardware, the software is not fully realized, but the completion of the CIC filter, carrier tracking loop, bit timing synchronization, and converts the string design, and several other key modules. Demodulator do laboratory tests to verify the correctness of the design related modules, an important carrier demodulator synchronization has been able to achieve Platform: |
Size: 8906752 |
Author:lvhenan |
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Description: 光伏并网系统以MSP430F169 单片机为核心，单片机输出SPWM 波形经IR2110驱动H桥，实现DC-AC 逆变。最大功率点跟（MPPT）绝对误差小于1 ，利用430单片机软件实现锁相环，用参考频率作为基准频率，对MSP430单片机的外中断和定时器测定相位，当反馈的电压信号相位滞后（超前）于参考信号的相位时，就增大（减小）SPWM的频率；达到相位和频率同步。包括阻性负载，以及非阻性负载，实现了频率跟踪，相位跟踪。DC-AC 转换效率达88 ，人机接口LCD液晶显示器，界面直观、简洁，显示输出电压、电流，具有良好的人机交互性能。-Photovoltaic (pv) grid system to MSP430F169 microcontroller as the core, the microcontroller output SPWM waveform by IR2110 driver H bridge, realize DC- AC inverter. Maximum power point (MPPT) with absolute error less than 1 , using 430 single chip microcomputer software phase-locked loop, with the reference frequency as a benchmark, external interrupt and timer of MSP430 single chip microcomputer phase, when the voltage feedback signal phase lag (advanced) in the phase of reference signal, will increase (decrease) of SPWM frequency To achieve phase and frequency synchronization. Including impedance load, as well as non resistance load, has realized the frequency tracking and phase tracking. DC- AC conversion efficiency up to 88 , and the man-machine interface LCD liquid crystal display, intuitive interface, concise, shows that the output voltage, current, has the good man-machine interactive performance. Platform: |
Size: 380928 |
Author:Tim Denve |
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Search - frequency tracking loop