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Description: 针对于OFDM系统同步算法问题，提出S&C算法。该仿真查看S&C算法的定时估计性能和定时估计均方误差。-Aim at the OFDM systems synchronous algorithm, this paper puts forward the S&C algorithm. The simulation algorithm of the timing check S&C estimated performance and regular estimates mean square error.
Platform: |
Size: 2048 |
Author: 郭菲菲 |
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Description: 【作者申明】
本插件免费开源，可任意下载传播！
【适用环境】
通达OA 2011及以上版本（5.0++）
更新说明：
2012-03-05
增加飞信支持
2012-03-02
增加定时发送功能，在手机短信模块发送短信时，选择发送时间的，将不再直接发送，或直接发送未成功的（可能网络不通等原因），现修正为仅提交记录保存于数据表中，由定时任务来完成定时发送，定时任务设置请在【系统管理】--【定时任务管理】修改。
修正因保存完整邮件地址致【收信人】为“未知”的错误。
插件说明：
1、功能说明
支持移动、联通、电信手机用户
-【Affirm
This plugin is free and open source, you can download any spread.
[Applicable environmental
Mastery in the OA 2011 and above (5.0)
Update:
2012-03-05
Increase Fetion support
2012-03-02
Increase regularly sent in the SMS module to send text messages, select the send time reasons, will no longer be sent directly, or sent directly was not successful (and possibly the network is disconnected) would be amended to only submit the records stored in the data table, regularly sent by the timer task to complete set of timing tasks in system management- [timed task management] to modify.
Correction induced to save the complete e-mail address [recipient] as "unknown" error.
Plug-in instructions:
1, function
Support Mobile, China Unicom, Telecom mobile phone users
Platform: |
Size: 22528 |
Author: liangyingchun |
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Description: 利用AT89S51单片机的T0、T1的定时计数器功能，来完成对输入的信号进行频率计数，计数的频率结果通过8位动态数码管显示出来。要求能够对0－250KHZ的信号频率进行准确计数，计数误差不超过±1HZ。-AT89S51 microcontroller T0, T1 timing counter to the input signal frequency count, and count the frequency of results through eight dynamic digital tube display. Requires the ability to 0-to 250KHZ the signal frequency, an accurate count, counting error of less than ± 1HZ.
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Size: 254976 |
Author: fanyi |
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Description: 本程序用AT89S51单片机的T0、T1的定时计数器功能，来完成对输入的信号进行频率计数，计数的频率结果通过8位动态数码管显示出来。可对0－250KHZ的信号频率进行准确计数，计数误差不超过±1HZ。-AT89S51 microcontroller T0, T1 timing counter function of this program, to complete the input signal frequency count, count the frequency of the results of eight dynamic digital tube display.0-to 250KHZ the signal frequency for accurate counting, counting error does not exceed ± 1HZ.
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Size: 1024 |
Author: bqrm |
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Description: STM32延迟库函数，采用SysTick计时，包含delay_us、delay_ms功能，实测误差0.6us。-Delay functions of STM32 library, Using ysTick timer for timing. It includes delay_us and delay_ms function. The measured error is 0.6us according to the oscilloscope.
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Size: 2048 |
Author: |
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Description: 这是一个复位延时程序，对复位信号进行定时的延时，确保抖动多产生的信号误差-This is a reset delay procedures, the timing delay of the reset signal, to ensure jitter and more signals generated error
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Size: 13312 |
Author: 张丽丽 |
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Description: （1）、实时显示秒、分、时、年等（可自动或手动设置显示）
（2）、具有定时功能
（3）、能调整时间、日期
（4）、能调整定时时间
（5）、时钟走时误差一天少于1分钟
-(1), real-time display seconds, minutes, and year (automatically or manually set) (2), with a timer (3), can adjust the time, date, (4), can adjust the timing (5) clock walk error of less than one minute a day
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Size: 56320 |
Author: 任飞 |
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Description: Orthogonal Frequency Division Multiplexing (OFDM)
systems are more sensitive to timing and frequency offsets than
single carrier systems. This Paper presents a method of joint time
and frequency synchronization for OFDM systems. The
synchronization technique is examined in both AWGN and
multipath fading environments. Compared with conventional
schemes, the proposed schemes can achieve smaller mean and mean
square error (MSE) obtained by simulations.
Platform: |
Size: 2048 |
Author: monia |
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Description: Orthogonal Frequency Division Multiplexing (OFDM)
systems are more sensitive to timing and frequency offsets than
single carrier systems. This Paper presents a method of joint time
and frequency synchronization for OFDM systems. The
synchronization technique is examined in both AWGN and
multipath fading environments. Compared with conventional
schemes, the proposed schemes can achieve smaller mean and mean
square error (MSE) obtained by simulations.
Platform: |
Size: 3072 |
Author: monia |
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Description: Orthogonal Frequency Division Multiplexing (OFDM)
systems are more sensitive to timing and frequency offsets than
single carrier systems. This Paper presents a method of joint time
and frequency synchronization for OFDM systems. The
synchronization technique is examined in both AWGN and
multipath fading environments. Compared with conventional
schemes, the proposed schemes can achieve smaller mean and mean
square error (MSE) obtained by simulations.
Platform: |
Size: 2048 |
Author: monia |
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Description: Orthogonal Frequency Division Multiplexing (OFDM)
systems are more sensitive to timing and frequency offsets than
single carrier systems. This Paper presents a method of joint time
and frequency synchronization for OFDM systems. The
synchronization technique is examined in both AWGN and
multipath fading environments. Compared with conventional
schemes, the proposed schemes can achieve smaller mean and mean
square error (MSE) obtained by simulations.
Platform: |
Size: 8192 |
Author: monia |
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Description: QPSK的Matlab/Simulink的调制解调仿真系统，给出接收信号眼图及系系统仿真误码率，包含载波恢复，匹配滤波，定时恢复等重要模块，帮助理解QPSK的系统
-QPSK modulation and demodulation of Matlab/Simulink simulation system, given the received signal eye diagram and other system simulation error rate, including carrier recovery, matched filtering, timing recovery and other important modules to help understand the QPSK system
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Size: 7168 |
Author: |
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Description: MC33035无刷直流电机控制器采用双极性模拟工艺制造，可在任何恶劣的工业环境条件下保证高品质和高稳定性。该控制器内含可用于正确整流时序的转子位置译码器，以及可对传感器的温度进行补偿的参考电平，同时它还具有一个频率可编程的锯齿波振荡器、一个误差信号放大器、一个脉冲调制器比较器、三个集电极开路顶端驱动输出和三个非常适用于驱动功率场效应管（MOSFET）的大电流图腾柱式底部输出器。此外，MC33035还有欠锁定功能，同时带有可选时间延迟锁存关断模式的逐周限流特性以及内部热关断等特性。其典型的电机控制功能包括开环速度、正向或反向、以及运行使能等。-The MC33035 brushless DC motor controller uses bipolar analog process manufacturing, to ensure high-quality and high stability in harsh industrial environmental conditions. The controller contains can be used for the rotor position decoder of the correct timing of the rectifier, as well as of the temperature of the sensor to compensate for the reference level, while it also has a programmable frequency sawtooth oscillator, an error signal amplifier, a pulse modulator comparator, three open collector top drive output and three very suitable for high-current drive power field-effect transistor (MOSFET) the bottom of the totem pole output. In addition, MC33035 also owe lock function with selectable time delayed latched shutdown mode cycle-by-cycle current limiting characteristics, and internal thermal shutdown. Typical motor control functions include open loop speed, forward or reverse, and run enable.
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Size: 35840 |
Author: lushuai |
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Description: art.Dialog 是一个轻巧且高度兼容的javascript对话框组件，可让你的网页交互拥有桌面软件般的用户体验。
功能： 支持锁定屏幕(遮罩)、模拟alert和confirm、多窗口弹出、静止定位、支持Ese键关闭对话框、定时关闭、自定义位置、拖动、鼠标调节窗口大小、换肤……
art.Dialog4.1.6更新说明:
修复刷新框架后脚本报错的问题-art.Dialog is a lightweight and highly compatible javascript dialog components, can let you interact with the web like desktop software user experience. Features: support for the lock screen (mask), analog alert and confirm, multi-window pop-stationary positioning support the Ese button to close the dialog box, timing closure, custom location, drag the mouse to adjust the window size, peels ...... art. Dialog4.1.6 update: script error repair refresh framework
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Size: 508928 |
Author: lnos |
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Description: 通信协议要求:
1. 定时数据通信：每秒钟每台计算机分别交换10、20、30、40、50个字节的数据。
2. 广播通信：每十秒中，发布广播数据对各个计算机的时钟进行同步。
3. 错误检测：CRC错误检测，有错误时，采用相应的错误处理程序。
4. 网络管理：随时获知网络中各节点的工作状态，当有节点故障退出网络或新的节点加入网络时，能够记录网络状态。
-Communication protocol requirements: 1. The timing data communication: every seconds each computer respectively exchange ten and twenty, thirty, forty, fifty bytes of data. 2. Broadcast communication: every ten seconds, release broadcast data to each computer s clock for synchronization. 3. Error detection: CRC error detection, error, the corresponding error handling procedure. 4. Network management: always acknowledge of each node in network work state, when a node fault exit network or the new node to join the network, to record the network state.
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Size: 70656 |
Author: 张鹏 |
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Description: 以单片机AT89C2051为核心，74HC164和ULN2003为外围，采用独特的编程思想，使得作品具有日历，闹钟，时钟和整点提醒功能，并可以随时更改设置、查看当前日历或闹钟,各显示状态均有明显的特征。其中，日历具有闰年补偿功能，并可对日历设置进行纠错，在时钟工作状态下进行的查看操作不影响计时，在此状态可以撤消或重启闹钟。-AT89C2051 microcontroller as the core, 74HC164 and ULN2003 peripheral, unique programming ideas, makes the work calendar, alarm clock, clock, and the whole point of reminder, and you can change the settings at any time, to view the current calendar or alarm clock, each display status significantly characteristics. Which calendar with leap year compensation, and calendar settings, error correction clock state to see if the operation does not affect the timing in this state can undo or restart the alarm clock.
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Size: 18432 |
Author: 黄盛海 |
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Description: ATmega128实时时钟程序，可精确定时，一天的计时时间误差不超过2秒-The ATmega128 real-time clock procedures, can be precisely timed timing time error of not more than 2 seconds
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Size: 19456 |
Author: 黄一琪 |
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Description: 利用AT89S51单片机的T0、T1的定时计数器功能，来完成对输入的信号进行频率计数，计数的频率结果通过8位动态数码管显示出来。要求能够对0－250KHZ的信号频率进行准确计数，计数误差不超过±1HZ。-The AT89S51 microcontroller T0, T1 timing counter function to complete the input signal frequency count, counting the frequency of the results of an 8-bit dynamic digital tube display. Requirement to accurately count the frequency of the signal of 0-250KHZ, counting error of not more than 1 Hz.
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Size: 1024 |
Author: 谭泽华 |
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Description: 比较完成的OFDM系统仿真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。-Compare completed received OFDM symbols OFDM system simulation algorithms and program flow with the sender sends the end frame structure used in a relationship. Concrete frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can reference algorithm documentation.
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Size: 128000 |
Author: maomao |
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Description: Time and Frequency Synchronization Techniques for
OFDM Systems operating in Gaussian and Fading
Channels: A Tutorial
The aim of this paper is to survey and compare
previous methods for Data-aided timing and frequency
synchronization of OFDM System. In the sequel, we propose a fast
and accurate FFT-based frequency offset estimation. The
synchronization techniques are examined in Gaussian andMultipath fading environments for comparison. The results of the
performance comparison are presented in terms of mean andmean-square error (MSE) obtained by simulations. The timing
offset estimator with best performance is chosen for system timingsynchronization. The FFT-based frequency offset estimation
method has significantly smaller MSE than others can beperformed using the same timing training symbol. Therefore,there is only one training symbol needed as preamble in whole
synchronization process.
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Size: 340992 |
Author: Mohamed |
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