Description: Example of a digital data transmission implementing GMSK modulation
This Simulink model simulates as an example the transmission and reception of random digital data modulated with GMSK. The purpose of this model is to illustrate how part of the GSM transmission and reception works. It also measures the BER, affected by an AWGN channel -Example of a digital data transmission The need lementing GMSK modulation This Simulink model simulates as an example the transmission and re Arjen of random digital data modulated with G. MSK. The purpose of this model is to illustrate h ow part of the GSM transmission and reception wo rks. It also measures the BER. affected by an AWGN channel Platform: |
Size: 6945 |
Author:李艳芬 |
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Description: This project allows you to learn communication systems in greater depth. It contains the Simulink files (*.mdl) which are block design files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM and Delta Modulation.
The idea here is to implement experiments of a traditional communication lab using Simulink.
Most of the block diagrams are self explanatory. More information on the systems and their implementation can be found in the word documents included in the lab directories Platform: |
Size: 2469104 |
Author:haibak |
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Description: Example of a digital data transmission implementing GMSK modulation
This Simulink model simulates as an example the transmission and reception of random digital data modulated with GMSK. The purpose of this model is to illustrate how part of the GSM transmission and reception works. It also measures the BER, affected by an AWGN channel -Example of a digital data transmission The need lementing GMSK modulation This Simulink model simulates as an example the transmission and re Arjen of random digital data modulated with G. MSK. The purpose of this model is to illustrate h ow part of the GSM transmission and reception wo rks. It also measures the BER. affected by an AWGN channel Platform: |
Size: 7168 |
Author:李艳芬 |
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Description: 数字图像传输是图像编码与压缩技术的另一个重要应用领域。随着现代社会对通信业务要求的不断增长，图像通信和通信网容量的矛盾日益突出。特别是具有庞大数据量的数字图像信息更是难以传输和存储，极大地制约了图像通信的发展，已经成为图像通信发展中的瓶颈。图像压缩技术的应用为传真、视频点播、电视会议、医用图像传输等领域带来了巨大经济效益。快速压缩解压缩算法及其硬件结构在实时视频系统中起着关键的作用。
-digital image transmission of image coding and compression technologies Another important application areas. As modern society to the requirements of the communications business continued to grow, image communication and communication network capacity contradictions are becoming more prominent. Especially with the huge amount of data digital image information more difficult for transmission and storage, has greatly restricted the development of image communication, image communication has become a bottleneck in development. Image compression technology for the application by fax, video-on-demand, video-conferencing, transmission of medical images and other areas has brought huge economic benefits. Rapid compression and decompression algorithms in hardware for real-time video system plays a Platform: |
Size: 2209792 |
Author:陈兵 |
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Description: This project allows you to learn communication systems in greater depth. It contains the Simulink files (*.mdl) which are block design files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM and Delta Modulation.
The idea here is to implement experiments of a traditional communication lab using Simulink.
Most of the block diagrams are self explanatory. More information on the systems and their implementation can be found in the word documents included in the lab directories-This project allows you to learn communication systems in greater depth. It contains the Simulink files (*. mdl) which are block design files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM and Delta Modulation. The idea here is to implement experiments of a traditional communication lab using Simulink.Most of the block diagrams are self explanatory. More information on the systems and their implementation can be found in the word documents included in the lab directories Platform: |
Size: 2468864 |
Author:haibak |
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Description: 数据采集系统作为沟通模拟域与数字域的必不可少的桥梁有着非常重要的作用。本文介绍的重点是数据采集系统。数据采集与通信控制采用了模块化的设计，数据采集与通信控制采用了单片机8051来实现，硬件部分是以单片机为核心，还包括模-数转换模块，显示模块，和串行接口部分，还有一些简单的外围电路。8路被测电压通过通用ADC0809模-数转换，实现对采集到的数据进行模拟量到数字量的转换，由单片机对数据进行处理，用LCD显示模块来显示所采集的结果，并将数据通过串行口传输到PC机上，MCU与 PC机间的电平匹配采用MAX232接口芯片，由PC机完成数据接收和显示，VB程序编写了更加人性化的人机交互界面。-Data Acquisition System Analog domain as communication with the figure of the indispensable bridge between the domain has a very important role. This article focuses on the introduction of data acquisition system. Control data acquisition and communication of the use of a modular design, data collection and communications control to the use of a 8051 single-chip implementation, the hardware part of the single-chip microcomputer as the core, but also mold- digital conversion module, display module, and serial interface part, have some simple external circuit. 8 road test voltage through the common mode ADC0809- conversion, implementation of the collected data to the digital analog conversion, the data from the single-chip processing, with LCD display module to display the result of the acquisition, and data transmission through the serial port on the PC machine, MCU and PC-level matching between the MAX232 interface chip used by the PC-finish data reception and display, VB programmers Platform: |
Size: 61440 |
Author:liusixue |
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Description: This Simulink model simulates as an example the transmission and reception of random digital data modulated with GMSK. The purpose of this model is to illustrate how part of the GSM transmission and reception works. It also measures the BER, affected by an AWGN channel. Platform: |
Size: 7168 |
Author:Ted |
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Description: 数字基带信号的传输是数字通信系统的重要组成部分。在数字通信中，有些场合可不经过载波调制和解调过程，而对基带信号进行直接传输。采用AMI码的信号交替反转，有可能出现四连零现象，这不利于接收端的定时信号提取。而HDB3码因其无直流成份、低频成份少和连0个数最多不超过三个等特点，而对定时信号的恢复十分有利，并已成为CCITT协会推荐使用的基带传输码型之一。为此，本文利用VHDL语言对数据传输系统中的HDB3编码器进行了设计。-Digital baseband signal transmission is an important digital communication system components. In digital communications, some occasions may, after modulation and demodulation process, and on the base-band signals transmitted directly. AMI code using the turn signal inversion, there may be zero Silian phenomenon, which is not conducive to the receiving end of the timing signal extraction. HDB3 code and its non-DC components, and even less low-frequency components of 0 up to more than three the number of characteristics such as timing signals for the recovery of very favorable, and the Association has become the CCITT recommended base-band transmission-type, one code. In this paper, the use of VHDL language in the data transmission system HDB3 encoder has been designed. Platform: |
Size: 108544 |
Author:shashou |
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Description: 包括了对不同通信系统的simulink仿真，如AM, DSB-SC, FM, PLL, Data Acquistion, Digital Data Transmission, PCM and Delta Modulation。通过这些可以帮助用户对通信仿真有更深的理解。-This project allows you to learn the communication systems in greater depth by giving you
the reins to play with it ! It contains the simulink files (*.mdl) which are block design
files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital
Data Transmission, PCM and Delta Modulation. Platform: |
Size: 2022400 |
Author:yinwenyi |
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Description: These M-files are "Communications Toolbox" for
classroom use. It is used by students taking a 4th year communications course where the emphasis is on digital coding of waveforms and on digital
data transmission systems. Platform: |
Size: 278528 |
Author:Morteza Babaee |
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Description: 是一种显示驱动器，它广泛应用在数字时钟、温度计、湿度计等工业仪器仪表显示中。
步行小绿人是利用驱动由个×点阵块组成的×点阵幕来显示小緑人行走动画。采为主芯片来控制进行数据传输，通过三根线数据写入。 有两种显示方式：此设计采用显示方式。
步行小绿人由幅不同姿势的画面来完成一个走路动作。按键用来改变小绿人动作状态。 - is a display driver, it is widely used in digital clock, thermometer, hygrometer and other industrial instrumentation display. little green men on foot is to use drivers from a dot matrix blocks × × dot-matrix screen to show the little green men walking animation. Mining-based chip to control the data transmission, data is written by three lines. There are two display: This design uses a display. little green men on foot in different positions from the pieces of the screen to complete a walking action. Button is used to change the little green men action status. Platform: |
Size: 1024 |
Author:张钧 |
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Description: 文件中包含有AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM和Delta Modulation的simulink环境下的实现 -This project allows you to learn the communication systems in greater depth by giving you
the reins to play with it ! It contains the simulink files (*.mdl) which are block design
files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital
Data Transmission, PCM and Delta Modulation. Platform: |
Size: 2487296 |
Author:胡欣 |
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Description: 该THS5651是一个10位分辨率的数字到模拟转换器（DAC），专为优化数字数据
传输有线和无线通信系统。 10位DAC是一个CommsDAC成员
高速，低功耗CMOS数字系列模拟转换器。该CommsDAC系列由管脚
兼容的14 - ，12 - ，10 - ，和8位DAC。所有设备提供相同的接口选择，小外形封装和
引脚。该THS5651提供优越的AC和DC性能，同时支持更新率高达100 MSPS的。-The THS5651 is a 10-bit resolution digital-to-analog converter (DAC) specifically optimized for digital data
transmission in wired and wireless communication systems. The 10-bit DAC is a member of the CommsDAC
series of high-speed, low-power CMOS digital-to-analog converters. The CommsDAC family consists of pin
compatible 14-, 12-, 10-, and 8-bit DACs. All devices offer identical interface options, small outline package and
pinout. The THS5651 offers superior ac and dc performance while supporting update rates up to 100 MSPS. Platform: |
Size: 580608 |
Author:陈祥 |
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Description: An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. -An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. Platform: |
Size: 11264 |
Author:Griffin Wright |
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Description: 这个Simulink模型实现一个使用GMSK调制的随机数字数据的发射和接收。同时测量AWGN信道对BER的影响。-The Simulink model uses GMSK modulation to achieve a random digital data transmission and reception. AWGN channel simultaneous measurement of the impact on the BER. Platform: |
Size: 7168 |
Author:沈春龙 |
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Description: 该系统是介绍一个基于web service的数字油田监控系统，整个系统分成三个部分：现场监控终端、监控中心和移动控制终端。以嵌入式linux系统作为现场监控终端，分别在windows平台和liunx平台下实现监控中心。移动终端控制利用嵌入式开发板ARM2410S上的相关设备来实现。三端之间的数据传输都是通过web service实现的，只有在视频数据传输时用socket实现。-The system is to introduce a web service based on the number of field monitoring system, the entire system is divided into three parts: on-site monitoring terminal, control centers, and mobile control terminal. Embedded linux system as the on-site monitoring terminal, respectively, in windows platform and liunx platform to achieve the monitoring center. Control the use of mobile devices on embedded development board ARM2410S related equipment to achieve. Three-terminal data transmission between the web service is achieved by only the video data transmission with the socket implementation. Platform: |
Size: 870400 |
Author:liao |
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Description: Orthogonal Fwquency Division Multiplexing
(OFDM) and Discrete MultiTone (DMT) modulation
offer many advantages for digital data transmission and have been adopted for several important standards.
Their primary drawback is a high peak-toaverage
power ratio (PAR). Methods which introduce
compensation signals in unused channels, first developed by Gatherer and Polley, are among the more promising methods for reducing the PAR. However, these methods apply only to systems with unused channels or require the sacrifice of data rate for PAR reduction. We present a new method for PAR reduction using active (data-carrying) channels which dynamically moves outer constellation points, within margin-preserving constraints, to minimize the peak magnitude. This scheme simultaneously decreases the
bit error rate slightly while substantially reducing the peak magnitude simulations show peak reductions of slightly more than 6 dB.-Orthogonal Fwquency Division Multiplexing
(OFDM) and Discrete MultiTone (DMT) modulation
offer many advantages for digital data transmission and have been adopted for several important standards.
Their primary drawback is a high peak-toaverage
power ratio (PAR). Methods which introduce
compensation signals in unused channels, first developed by Gatherer and Polley, are among the more promising methods for reducing the PAR. However, these methods apply only to systems with unused channels or require the sacrifice of data rate for PAR reduction. We present a new method for PAR reduction using active (data-carrying) channels which dynamically moves outer constellation points, within margin-preserving constraints, to minimize the peak magnitude. This scheme simultaneously decreases the
bit error rate slightly while substantially reducing the peak magnitude simulations show peak reductions of slightly more than 6 dB. Platform: |
Size: 339968 |
Author:redami |
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Description: Digital realization of timing recovery circuits for digital data transmission are of growing interest, in this paper, we present a new digital algorithm which can be implemented very efficiently also at high data rates. Platform: |
Size: 462848 |
Author:Joel |
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Search - digital data transmission