Description: 一款程序源代码发布管理系统的源码，比之初始状态更新了若干内容，主要有： 1.重新定义了表格 2.修正了左侧导航栏的高度问题 3.改变了浏览内容时回到顶端的显示方式 4.增加了制表符和换行符的过滤 5.增加了行数显示 6.加入了静态页面预览功能 7.更新了界面 8.修改了数据库未同步的错误 9.增加了显示管理，控制文件是否显示 10.为每个文件增加了水平滚动条-new source code management system released the source code, which compared to the initial state updated several elements, including : 1. Re-definition of the two forms. Amendments to the left navigation bar height 3. Change the View content to the top of the display mode 4. Increased tab and newline filter 5. a few firms showed 6. join a static page preview function 7. updated interface 8. the database did not change the synchronization error 9. showed an increase of management, control documents show 10. for each document increased the level of the rolling Platform: |
Size: 52427 |
Author:蔡思洋 |
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Description: 由于使用了大量数目的子载波，这就使得多载波系统对多种同步误差都很敏
感。同步误差可分为两大类:载波相位
-due to the use of the large number of subcarriers, which makes multi-carrier systems for a variety of synchronization errors are very sensitive. Synchronization error can be divided into two categories : carrier phase Platform: |
Size: 11007 |
Author:张开 |
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Description: 一款程序源代码发布管理系统的源码，比之初始状态更新了若干内容，主要有： 1.重新定义了表格 2.修正了左侧导航栏的高度问题 3.改变了浏览内容时回到顶端的显示方式 4.增加了制表符和换行符的过滤 5.增加了行数显示 6.加入了静态页面预览功能 7.更新了界面 8.修改了数据库未同步的错误 9.增加了显示管理，控制文件是否显示 10.为每个文件增加了水平滚动条-new source code management system released the source code, which compared to the initial state updated several elements, including : 1. Re-definition of the two forms. Amendments to the left navigation bar height 3. Change the View content to the top of the display mode 4. Increased tab and newline filter 5. a few firms showed 6. join a static page preview function 7. updated interface 8. the database did not change the synchronization error 9. showed an increase of management, control documents show 10. for each document increased the level of the rolling Platform: |
Size: 52224 |
Author:蔡思洋 |
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Description: 一个产生PN15伪随机序列并模拟噪声干扰和统计误码率的通讯系统仿真程序，主要实现了PN序列的同步算法和实时误码统计-PN15 have a pseudo-random sequence and noise simulation and statistical error rate communications system simulation program, the main PN sequence of real-time synchronization algorithm and error statistics Platform: |
Size: 259072 |
Author:辉辉 |
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Description: 由于使用了大量数目的子载波，这就使得多载波系统对多种同步误差都很敏
感。同步误差可分为两大类:载波相位
-due to the use of the large number of subcarriers, which makes multi-carrier systems for a variety of synchronization errors are very sensitive. Synchronization error can be divided into two categories : carrier phase Platform: |
Size: 10240 |
Author:张开 |
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Description: 北邮通信仿真教程第10章的源程序，教程网上可以搜到，程序包括BPSK,QPSK的调制解调，载波同步，误比特率的计算等。-Beijing University of Posts and Telecommunications Communication Simulation Guide to Chapter 10 of the source, the Guide can be found online that included BPSK, QPSK modulation and demodulation, carrier synchronization, bit error rate calculation. Platform: |
Size: 12288 |
Author:到达 |
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Description: This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz –
16,000Hz). The test files used as information files were text files.
This goal was attained both in an incoherent scheme and in a coherent scheme.
Build under Matlab code, our modem uses OFDM (orthogonal frequency division
multiplexing) modulation, synchronization by LMS sequence, channel estimation (no
equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of
2 or 4. To optimize the probability of error, these symbols were mapped using Gray
mapping.
Report-This project aim was to build wireless software modem for data communicationbetween two computers using an acoustic interface in the voice frequency range (20Hz-20000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz-20000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz-16000Hz). The test files used as information files were text files.This goal was attained both in an incoherent scheme and in a coherent scheme.Build under Matlab code, our modem uses OFDM ( orthogonal frequency divisionmultiplexing) modulation, synchronization by LMS sequence, channel estimation (noequalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of2 or 4. To optimize the probability of error, these symbols were mapped using Graymapping.Report Platform: |
Size: 559104 |
Author: |
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Description: 有关信号的调制，解扩解调的主要的时间同步方面的程序
-On the signal modulation, demodulation despreading the main time synchronization procedures Platform: |
Size: 6675456 |
Author:飞天 |
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Description: 本文首先概述了OFDM 的原理、特征和关键技术，介绍了系统需要的几种同步。然后就同步误差对系统性能的影响进行了简单的分析，表明定时偏差和采样频率偏差将会引入码间干扰，载波频率偏差导致载波间干扰的发生。因此，在OFDM系统接收机中定时的确定、载波频率偏差和采样频率偏差的纠正是信号恢复的关键。之后对OFDM系统同步的几种实现方法进行了介绍，分析了各同步方法的性能。-The paper first outlines the principles of OFDM, features and key technologies, the system needs to introduce several synchronization. Synchronization error and then the impact on system performance for a simple analysis, show that the timing deviation and the sampling frequency deviation will introduce inter-symbol interference, the carrier frequency deviation led to the occurrence of ICI. Therefore, in OFDM system receiver to determine the timing, carrier frequency offset and sampling frequency offset correction signal to restore the key. After the OFDM system to achieve synchronization of several methods of introduction, an analysis of the performance of the synchronization method. Platform: |
Size: 268288 |
Author:dajinyu |
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Description: 值得深刻阅读的基于CP的OFDM同步程序
这是一个非常好的用于OFDM的基于CP的 最大似然符号定时同步和载波同步的MATLAB仿真程序，经本人深入阅读吸收经典文献，反复编程调试而提炼而成，代码精炼有序，绝对没有错误，由此程序仿真得到的同步曲线与经典文献完全一致。同仁们阅读此程序一定受益匪浅！ 这里不吝成果，特上载与诸位网友共享。也欢迎同仁们提供更多的优秀程序。 由于文献要求采用N＝1024个子载波的OFDM，运行此程序需2分钟－3分钟的时间。
-Worthy of profound reading of the CP-based OFDM synchronization process this is a very good CP for OFDM-based maximum likelihood symbol timing synchronization and carrier synchronization of the MATLAB simulation program, after I read the absorption of classical literature in depth, repeated programming and debugging extracted from the symbol of refined and orderly, there is no error, this procedure has been synchronized simulation curve is fully consistent with classical literature. Tongren have read this procedure will definitely benefit! Spared the outcome here, especially to upload to share with you friends. Tongren also welcome to provide more excellent program. Documentation required as a result of N = 1024 sub-carrier OFDM, to run this process will take 2 minutes-3 minutes. Platform: |
Size: 1024 |
Author:张华 |
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Description: Matlab的OFDM在多径Rayleigh信道下的同步
1. 假设频率已同步，设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
2. 设时间已同步，设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线.-Matlab-OFDM in multipath Rayleigh channel synchronization 1. Assume that the frequency has been synchronized, the design of a specific OFDM cyclic prefix for time synchronization method, using Simulink simulation to depict the bit signal to noise ratio and the capture probability curve. 2. Set up time is synchronized to design a specific OFDM cyclic prefix for frequency synchronization method, using Simulink simulation to depict the bit signal to noise ratio and frequency synchronization error of the curve. Platform: |
Size: 21504 |
Author:the13thstone |
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Description: In this paper, we investigate the timing and carrier
frequency offset (CFO) synchronization problem in decode and
forward cooperative systems operating over frequency selective
channels. A training sequence which consists of one orthogonal
frequency-division multiplexing (OFDM) block having a tile
structure in the frequency domain is proposed to perform synchronization.
Timing offsets are estimated using correlation-type
algorithms. By inserting some null subcarriers in the proposed tile
structure, we propose a computationally efficient subspace decomposition-
based algorithm for CFO estimation. The issue of optimal
tile length is studied both theoretically and through simulations.
By judiciously designing the tile size of the pilot, the proposed
algorithms are shown to have better performance, in terms of
synchronization errors and bit error rate, than the time-division
multiplexing-based training method and the computationally demanding
space-alternating generalized expectation-maximization Platform: |
Size: 728064 |
Author:ashish |
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Description: 6. 在三条径的瑞利信道中，对于OFDM：
(1) 请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真，测量BPSK调制时的误码率性能。画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线。
(2) 设频率已同步，请设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已同步，请设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。
-。
6 In the three path Rayleigh channel for OFDM:
(1) Please design a specific guide-assisted channel estimation method, the Simulink simulation, BPSK modulation measuring the bit error rate performance. Draw-bit signal to noise ratio and channel estimation mean square error curve, draw-bit signal to noise ratio and bit error rate curve.
(2) set the frequency has been synchronized, the design of a specific OFDM cyclic prefix used for time synchronization method, the Simulink simulation, draw-bit signal to noise ratio and capture probability curve.
(3) set time has been synchronized, the design of a specific OFDM cyclic prefix used for frequency synchronization method, the Simulink simulation, draw-bit signal to noise ratio and frequency synchronization error curves. Platform: |
Size: 175104 |
Author:童俊贺 |
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Description: 本项目充分地利用了DSP 强大的信号处理能力和现代数值分析方法。设计了
电能表前端采样及计量模块的硬件，以及一套符合国标GB/T 17883-1999 的0.2S
级精度要求的算法，同时扩展了谐波分析功能。系统概述为：三相电压、电流
AD 采样，采样数据通过串口送至处理器(DSP)，由DSP 对采样数据作电参数计
量和谐波分析，处理结果通过定制LCD 显示，并通过脉冲口发出有功、无功校
表脉冲。DSP 采用ADI 公司的BLACKFIN531-16 位定点芯片，最高处理能力可
达800MIPS，采样芯片为16bit 的AD73360，支持六通道同步转换，无同步误差。
数字化、高精度、创新性和可扩展性是本项目的特点，准同步采样算法和谐波分
析是本项目的新颖之处。-This project fully utilize the DSP s signal processing capability and powerful modern numerical analysis. Design
Meter sampling and measurement module front-end hardware, and are consistent with national standard GB/T 17883-1999 of the 0.2S
Level accuracy of the algorithm, and extends the harmonic analysis. System is summarized as: three-phase voltage, current
AD sampling, sampling data sent through the serial processor (DSP), the sampled data from the DSP design for electrical parameters
Volume and harmonic analysis, the results through customizable LCD display, and issued by the pulse port active and reactive school
Table pulse. DSP ADI s BLACKFIN531-16 bit fixed-point chip, the maximum processing capability
Of 800MIPS, 16bit chip sampling of AD73360, support six-channel simultaneous conversion, no synchronization error.
Digital, high-precision, innovation and scalability characteristics of this project, quasi-synchronous sampling algorithm and sub-harmonic
Analysis i Platform: |
Size: 681984 |
Author:李易 |
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Description: 在电力系统通信中，数字光纤通信由于其本身的优点得到越来越广泛的应用。数字光纤通信系统中，从电端机传输过来的电信号均要结合数字光纤通信传输的特点经过线路码型的转换。通过线路码型的转变平衡数字码流中的“0”和“1”码字，从而避免码流中出现长“0”或者长“1”的现象。在数字光纤通信系统中比较常用的线路码型就是mBnB码型，mBnB线路码型的最大优点就是最大相同码元连码和少、定时信息丰富、并且有简单成熟的误码监测与码组同步的方法。
-In the power system communications, digital optical fiber communication because of its own merits to be more widely used. Digital optical fiber communication systems, from electrical signals transmitted over end machines have to combine the characteristics of digital optical communication transmission line pattern after the conversion. Through the balance of the line pattern of change in the digital stream, " 0" and " 1" code word, thus avoiding the emergence of a long stream of " 0" or long " a" phenomenon. In digital fiber optic communication systems commonly used in the line pattern is mBnB pattern, mBnB line coding of the biggest advantage is the greatest symbol with the same code and less time information-rich, mature and have a simple code group synchronization error monitoring and the method. Platform: |
Size: 1456128 |
Author:chenyingying |
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Description: 在蜂窝系统中，移动站台必须能够进行初始同步和搜索基站来开始下行接入。这个过程被称为初始小区搜索。在这篇文章中，同步和小区搜索被具体化。一个新颖的主同步信号的算法，包括理论分析和推导展现出来。-In cellular communication systems the mobile station (MS) must be able to perform initial synchronization and search for a base station to set up
the downlink access. This process is called the initial cell search.In this paper all the procedures of synchronization and initial cell search are specified. An innovative
processing algorithm for PSS, including the theoretical
analysis and deduction, is provided. Most important of all, the proposed scheme is able to evaluate the integer
carrier frequency offset (ICFO) more accurately and improve the detection error rate effectively. Platform: |
Size: 1120256 |
Author:陈伟 |
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Description: 在TOA测距的基础上，提出了一种三维无线传感器网络节点定位算法，并对其性能进行了分析，给出了算法的时间同步误差和定位误差。最后在现有仿真平台OMNET++的基础上构建三维仿真模块，对算法进行了仿真实现，给出了该算法的定位精度和覆盖率-This paper proposes one three-dimensional localization algorithm based on TOA distance measurement and analyzed the performance of the algorithm calculated time synchronization error and localization error. Finally it constructed three-dimensional simulation modules based on OMNET++ and implemented the algorithm educed the localization precision and coverage. Platform: |
Size: 296960 |
Author:于文娟 |
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Description: 这是一篇关于信道编码的文章，同传统的FEC不同，这篇文章考虑的不仅仅是替代错误，同时考虑可能出现的同步错误-This is an article about the channel coding, different from a traditional FEC, this article consider not only the substitution errors might occur, taking synchronization error Platform: |
Size: 206848 |
Author:阳诚 |
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Description: 主要介绍了现代MIMO—OFDM无线通信系统的事实过程，包括信道估计，同步，纠错的内容-The fact modern MIMO-OFDM wireless communication system processes, including channel estimation and synchronization, error correction Platform: |
Size: 922624 |
Author:dsz |
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Search - synchronization error