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[Communication] HDB3code

Description: 光纤通信中的编码方式hdb3，编解码的vhdl实现-Optical fiber communications in encoding hdb3, codec realize the VHDL
Platform: | Size: 5120 | Author: 江泽民 | Hits:

[VHDL-FPGA-Verilog] CPLDtemperatureinthefiredetectionsystemof

Description: 介绍了光纤光栅感温火灾探测系统的应用原 理，并重点阐述了用CPLD 设计虚拟MC14499 器件模 块，给出并解释了用Verilog HDL 语言实现的部分程 序和仿真测试结果。-Introduction of Fiber Bragg Grating temperature fire detection system principles, and focuses on the use of CPLD design virtual MC14499 device module, are given and explained using the Verilog HDL language to achieve some of the procedures and simulation test results.
Platform: | Size: 345088 | Author: hjh | Hits:

[Windows Develop] sdh

Description: SDH是现代光纤通信中广泛应用的数据传输格式,在SDH帧结构中，前9列为开销字节，它包含了很多重要的信息，本程序为SDH开销的接收处理，查找帧头，分频，勤务话字节E1异步fifo。可拆为三段源代码，不知道能不能抵三个程序-SDH is a modern optical fiber communication is widely used in data transmission format, in the SDH frame structure, as the former 9 overhead bytes, it contains a lot of important information, the procedures for receiving SDH overhead processing, search header, sub-frequency ,勤務if E1 asynchronous byte fifo. Removable for three source code, I do not know the three procedures can be arrived
Platform: | Size: 6144 | Author: 韩冰 | Hits:

[VHDL-FPGA-Verilog] SDHAnalysis

Description: 光纤通信中的SDH数据帧解析及提取的VHDL实现源代码，共包含帧同步、E1及F1码流提取、DCC1码流提取、帧头开销串行输出四个主要模块-SDH fiber-optic communication data frame analysis and retrieval implementation of VHDL source code, include the frame synchronization, E1 and F1 stream extraction, DCC1 stream extraction, header overhead serial output four main modules
Platform: | Size: 31744 | Author: 张晓彬 | Hits:

[VHDL-FPGA-Verilog] pcm

Description: 　　在光纤通信系统中，光纤中传输的是二进制光脉冲"0"码和"1"码，它由二进制数字信号对光源进行通断调制而产生。而数字信号是对连续变化的模拟信号进行抽样、量化和编码产生的，称为PCM（pulse code modulation），即脉冲编码调制。这种电的数字信号称为数字基带信号，由PCM电端机产生。-In optical fiber communication systems, fiber-optic transmission of light pulses is a binary " 0" code and " 1" code, which is a binary digital signal to carry out on-off modulation source derived. The digital signal is a continuously variable analog signal sampling, quantization and coding generated is called PCM (pulse code modulation), or pulse code modulation. Such as digital signal power digital baseband signal by the PCM client machine generated electricity.
Platform: | Size: 1024 | Author: 圈石 | Hits:

[Software Engineering] 123

Description: 基于FPGA 的光纤纵差保护同步接口的设计与实现-FPGA-based fiber-optic longitudinal differential protection synchronous interface design and implementation. Pdf
Platform: | Size: 308224 | Author: 军 | Hits:

[Software Engineering] fjq3

Description: 提出了一种基于FPGA 的数字复接电路的设计方法, 将多路视频信息复用为一路信息, 利用光纤传输平台进行传输, 提高了传输效率和传输质量, 改善了环境适应性. 在AL TERA 公司 的Q uartu s II 软件平台下, 应用VHDL 语言进行硬件电路的设计, 并给出了仿真结果. 关键词　视频信息, FPGA , 数字复接, 光纤通信-Presents a FPGA-based digital multiplexing circuit design method, multi-channel video information re-used as a way of information, the use of optical fiber transmission platform transmission, improve transmission efficiency and transmission quality, and improve the adaptability to environment. In AL TERA Q uartu s II the company' s software platform, the application of VHDL language hardware circuit design and simulation results. Keywords video information, FPGA, digital multiplexer, optical fiber communication
Platform: | Size: 157696 | Author: renxiang | Hits:

[Software Engineering] fjq4

Description: 光纤通信以其损耗低、高带宽、抗电磁干扰、保密性好等优点越来越多地应用在视频通信中[1～ 5 ]. 针对 光纤综合业务传输平台, 本文提出了一种将三路视频信息复用为一路视频信息的数字复接器的硬件电路 设计. 提高了传输容量和传输效率, 达到抗干扰、抗噪声的能力, 从而改善了传输平台的环境适应性及工作 性能. 该复接器硬件电路的设计采用EDA 技术, 以FPGA 器件为载体, 使用VHDL 硬件描述语言进行电路-Optical fiber communication with its low loss, high bandwidth, anti-electromagnetic interference, security and good benefits are increasingly used in video communications in the [1 ~ 5]. For the fiber optic integrated services delivery platform, this paper presents a three-way will be video information re-used as the way digital video multiplexer hardware circuit design. to improve the transmission capacity and transmission efficiency, to achieve anti-jamming, anti-noise capability, thereby improving the transmission platform, environmental adaptability and work performance. The re- connector hardware circuit design using EDA technology to FPGA devices as the carrier, using the VHDL hardware description language circuit
Platform: | Size: 325632 | Author: renxiang | Hits:

[VHDL-FPGA-Verilog] OpticalFiber

Description: 利用VHDL语言编写的光纤通信，将上位机的命令通过主站处理后，用光纤发送到从站。-VHDL language using fiber-optic communication, the host computer commands through the main points are treated, the fiber is sent to from the station.
Platform: | Size: 4542464 | Author: Harvey | Hits:

[VHDL-FPGA-Verilog] 5b6b

Description: 5B6B码是光纤数字通信系统中使用比较广泛的一种线路码型! 数据经过5B6B编码和并串转换后在光纤上传输，串行码序列中连续的比特0或比特1的长度不超过5，数据在0和1之间变换的密度很高,并具有直流平衡的特性，有利于接收电路和时钟恢复电路的设计。-5B6B code is used in fiber optic digital communication systems a more extensive line pattern! Data are 5B6B encoding and conversion, and string after the fiber transmission, serial code sequences in continuous bit 0 or bit 1 of the length of not more than 5, data between 0 and 1, the high density of transformation, and has the characteristics of DC balance, favorable reception circuit and clock recovery circuit.
Platform: | Size: 3072 | Author: 王彬 | Hits:

[VHDL-FPGA-Verilog] screw

Description: 一个好用的扰码器，主要用在光纤通信上面。因为为了保持送给光模块的信号不是全1或者全0-A nice scrambler, mainly used in optical fiber communication above. Because in order to maintain the optical module of the signal is not sent to all 1 or all 0
Platform: | Size: 1024 | Author: 刘金华 | Hits:

[Software Engineering] Baseband-optical-based-on-Gigabit

Description: 提出一种适用于数字微波接力系统的基 带光纤拉远的接口方案 采用高性能千兆以太网物理层芯片 88E1111 和 1.25G 光收发器 SSFF3151 完成基带接口 基带信号可以通过数字光纤传输技术传到远端 并恢复射频信号 介绍了 88E1111 的工作原理 性能 接口等 并给出硬件电路设计的原理 以及各部分的具体实现方法和原理图 -Compared with the traditional RF and IF pulls distant technology the baseband optical pulls distant technology has some obvious superiority,especially in feeder line processing and choice of station site it has become the main pulls distant technology in 3G network such as TD SCDMA.Refering to the baseband optical pulls distant technology in 3G network the paper proposes a scheme which is suitable for the digital microwave relay system.The design uses high performance Gigabit chip 88E1111 and 1.25G optical transceiver SSFF3151 to compelete the baseband interface.The signal transmits to the remote through the digital fiber and restores the radio frequency signal.This paper introduces 88E1111 s principle performance interface the hardware circuit design principles as well as part of the concrete implementation and schematic diagrams.The scheme satisfies the baseband transmision in the stability and the error rate aspect.It can be used in kinds of digital microwave relay systems.
Platform: | Size: 143360 | Author: moon | Hits:

[VHDL-FPGA-Verilog] VHDL_SDH

Description: 现代光纤通信SDH的VHDL源码，实现SDH开销的接收处理。-VHDL source code of modern fiber-optic communication SDH the SDH overhead of receiving and processing.
Platform: | Size: 57344 | Author: 张雷 | Hits:

[Embeded Linux] asas

Description: 系统应用FPGA技术，通过VHDL编程，在CPLD上实现。电子琴的基本原理是产生各个音符对应的频率，将频率放大后驱动喇叭发出音响。该电子琴包括手动弹奏与自动演奏两种功能，其中手动弹奏时还可录音回放。文中叙述了电子琴的设计原理和分块实现的方法，详细介绍各模块的设计及模块之间的连接组合方法，还包括电子琴 -According to incomplete statistics, these companies represent about 40 of the domestic fiber laser marking market. It should be noted that this part of the market there is a significant reduction in price, a price close to the cost almost achieved. Although this is to walk in front of several vendors in a sufficient amount to promote the production scale, improve quality, and reduce costs, but to the entire industry brought "a good product but can not profit"
Platform: | Size: 6144 | Author: 黎明 | Hits:

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