Description: 二阶锁相环的基本MATLAB仿真模型
说明了二阶环对频率阶跃的有效跟踪-second-order PLL basic MATLAB simulation model shows the second part of the effective frequency tracking Step Platform: |
Size: 3759 |
Author:任前义 |
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Description: 将提升小波用于目标跟踪。
小波提升的核心就是更新算法和预测算法,通过预测算法可以得到高频信息,而通过更新算子可以得到正确的低频信息.提升样式可以实现原位计算和整数提升,并且变换的中间结果是交织排列的.其中原位计算和整数提升在硬件实现中很有价值.-will enhance wavelet for target tracking. Lifting the core algorithm and is updated prediction algorithm, algorithm can be predicted high-frequency information, and by updating operator can correct the low-frequency information. upgrade format can achieve in-situ upgrade and Integer calculations, and transform the intermediate results are intertwined with a. which integer calculation and in-situ upgrading the hardware realization of great value. Platform: |
Size: 218112 |
Author:大仙 |
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Description: OFDM仿真程序MATLAB
接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档-MATLAB simulation program OFDM receiver algorithm and procedures used in processes and the sending end to send the frame structure of OFDM symbols are. Concrete frame structure, as well as the timing estimation, frequency offset estimation, the remaining error tracking algorithm algorithm can refer to documentation Platform: |
Size: 124928 |
Author: |
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Description: 快速可靠的GPS (全球定位系统)系统仿真可对双频GPS 接收机的设计、接收算法的研究
提供有效的帮助。文中详细介绍了在MatLab/Simulink 环境下GPS 系统仿真平台构建的基本方法。
首先分析了GPS 系统的各个环节，说明了各模型在仿真中的实现方法；然后给出了完整的系统仿
真框图，并在此平台上实现了GPS L2 载波相位跟踪的仿真。结果表明该仿真平台有效、可靠-Fast and reliable GPS (Global Positioning System) system simulation of dual-frequency GPS receiver design, receiver algorithm to provide effective help. Text in detail in the MatLab/Simulink environment GPS system simulation platform to build the basic method. First, we analyze the various segments of GPS systems shows that the model in the realization of simulation methods and then given a complete system simulation block diagram, and on this platform realize the GPS L2 carrier phase tracking of the simulation. The results show that the simulation platform for effective, reliable Platform: |
Size: 233472 |
Author:luoluo |
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Description: 1、 假定有一目标沿水平方向运动，起始位置为(-2000米，500米)，运动速度为10米/秒，扫描周期 秒， , 米，采用蒙特卡洛方法对跟踪滤波器进行仿真分析，仿真次数为100次-1, it is assumed that the target has one movement along the horizontal direction, the starting position for the (-2000 meters, 500 meters), velocity of 10 m/s, scanning cycle of seconds, and rice, using the Monte Carlo method for simulation analysis of tracking filter The simulation frequency was 100 times Platform: |
Size: 124928 |
Author:刘思 |
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Description: 数据辅助的载波相位跟踪，在第n个接收符号的DFT之后，导引子载波等于信道频率响应和已知符号的乘积根据余下的频率误差旋转以后的结果。-Data-aided carrier phase tracking in the first n months after receiving DFT symbols, guided subcarriers equivalent channel frequency response and known symbol of the product in accordance with rotation frequency error remaining after the results. Platform: |
Size: 1024 |
Author:李贞铭 |
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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: 详细介绍了(同步信号块处理)方法在静态软件接收机数据处理方面的应用。首先说明了的基本思想,然后具体介绍了捕获时根据相位差求精频的方法,以及在跟踪时使用理想相关方法进行码跟踪,使用相位差方法频率跟踪的详细过程，最后,在一个码周期内数字化码非整数的采样率下,提出了首尾相接的改进方法,成功实现了软件数据的跟踪。-Described in detail (synchronous signal block treatment) method in the static receiver data processing software applications. First of all, illustrates the basic idea, and then introduce a specific capture refinement based on phase-frequency method, as well as in tracking the use of the ideal correlation method for code tracking, frequency tracking using the phase difference method of the detailed process, finally, 1 yards in the cycle within the digital code of non-integer sampling rate, the proposed improvements in both phase methods, the successful implementation of data tracking software. Platform: |
Size: 522240 |
Author:何宁 |
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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: 基于PI_DPLL的高频逆变电源频率跟踪系统的研究-Based on the high-frequency inverter power source PI_DPLL frequency tracking system Platform: |
Size: 1019904 |
Author:AngleKing |
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Description: 在机动目标跟踪中，机动目标模型是机动目标跟踪的基本要素之一，一般希望机动目标模型能准确表征目标机动时的各种运动状态。比较常用的模型有匀速运动(CV)模型、匀加速运动(CA) 模型、时间相关模型（Singer）和机动目标“当前”统计模型。上述模型均采用机动频率表征目标的机动情况。在应用当中，通常采用固定的机动频率，这就表示机动目标的机动时间是一定的，而实际上机动目标的机动时间是不断变化的，也就是说机动频率是不断变化的，采用固定机动频率必然会带来误差。采样周期在0.5—2S时，机动频率越小跟踪精度越高[1]，但机动频率仍然是固定值。本文提出的基于神经网络的机动频率自适应调整方法可以使机动频率随机动而变化，从而提高状态估计的准确性，提高跟踪精度。本文将小波神经网络用于机动目标跟踪中机动频率的自适应调整，该算法对机动目标“当前”统计模型中的机动频率进行实时修改, 从而自适应的改变机动频率,使跟踪算法与目标的真实状态更接近。该算法采用小波神经网络的离线训练，实时性好。-The maneuver of the maneuvering target is uncertain. The maneuvering frequency is constantly changeable, but traditionally it is beforehand determined as a constant based on the target state estimation in the state model of the maneuvering target. The maneuver of the maneuvering target makes the kinematics equation of the target model mismatch with the practical motion model and the tracking error will be increased. Based on the advantages of the self-learning, the rapid convergence rate and the nonlinear approximation ability of the wavelet neural network, it was put forward to be used in the field of target tracking in the paper. The new residual is used as the input of the wavelet neural network, the output of the network is used to adjust adaptively the maneuvering frequency of the CS model. The algorithm is more close to the real state of the target. The simulation results showed that tracking error can be reduced and the tracking accuracy can be improved. Platform: |
Size: 4096 |
Author:李隆基 |
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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: gps单频软件接收机跟踪程序，用c语言在vc++6.0开发环境下写成，并且对载波产生和码产生使用x87的浮点汇编指令集提高速度。-single-frequency software receiver gps tracking program, using c language in vc++6.0 development environment, written and produced for use of carrier generation and code compilation of x87 floating-point instruction set speed. Platform: |
Size: 5120 |
Author:zhgl926 |
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Description: 大功率高Q值超声振动系统频率自动跟踪.pdf-High-power ultrasonic vibration system with high Q value of the automatic frequency tracking. Pdf Platform: |
Size: 131072 |
Author:YUANRUI |
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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: 这是一些关于旋转机械的频率追踪的参考资料，希望对大家有所帮助。-This is some of the rotating machinery frequency tracking reference, and they hope to help everyone. Platform: |
Size: 4192256 |
Author:wud_upc |
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Description: 频率测量vi，包括ESTI、比例法、多项式逼近法、多周期平均计数法、仿真信号源、能量矩平衡、频率跟踪、三点法-Frequency measurement vi, including ESTI, ratio method, polynomial approximation method, average more cycle counting method, the simulation signal source, energy moment balance, frequency tracking, three point method Platform: |
Size: 153600 |
Author:李玟 |
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Search - frequency tracking