数字信道

Analog channel ; digital coding ; fault detection

模拟信道；数字编码；故障检测

In this paper, digital baseband transmission system to a simple description, Channel Signal Processor of which are part of a focused on.

本文首先对数字基带传输系统进行了简单的描述，并对其中关于信道信号形成器的部分进行了着重讲解。

The article introduces the channelization technology in WCDMA digital mobile communication system.

本文主要介绍了在WCDMA数字移动通信系统中的信道化技术。

Modeling and simulating of Communication channel characteristics have great importance for development of modern digital communication systems.

移动无线信道特性的建模和仿真对于现代数字移动通信系统的研发具有重要意义。

In this paper applications of diversities directed against the property of the mobile channel for communications are summarized.

本文针对移动信道的特性，综述了分集技术在数字移动通信中的应用。

Multichannel digital I/O, with opto-isolation and Darlington driver facilities.

1多信道数字输入/输出接口，带有光隔离和达林顿驱动设施。

Circuit principles, analogue circuit, digit circuit which laid me a solid foundation of circuit for the study of communication; the study of electronic circuit of communication provided me with the working principles of analog communication system; the study on communication theory made me grasp the working methods of digital communication; the study on electromagnetic field, electromagnetic wave and aerial let me know that how signals travel through signal paths and how to apply signal and linear system, random signal and system to the research of noise's impact on signals

学习了电路原理、模拟电路、数字电路打下了学习通信的电路基础；学习了通信电子线路掌握了模拟通信系统的工作原理；学习了通信原理掌握了数字通信的工作方法；学习了电磁场与电磁波、微波与天线了解了信号如何在信道中传输；学习了信号与线性系统和随机信号与系统来研究噪声对信号的影响。

By using the fauna of digital television broadcasting channel, sue as mass data transmission, less resource occupied than Internet, and QoS guarantee, this system is de signed base on the Redbud DTV front-end sys tem developed by Shenzhen institute of Tsinghua university. The designed system is a low-cost data downloader using more simple protocols than current data broad cast.

利用数字电视广播信道可以实现大容量的数据传送，与互联网相比具有占用资源少、服务质量有保证等特点，在深圳清华大学研究院数字电视前端系统紫荆神网的基础上，设计实现了比现有数据广播协议更简便的低成本数据下载终端。

The primary technical issues with streaming were:· having enough CPU power and bus bandwidth to support the required data rates · creating low-latency interrupt paths in the OS to prevent buffer underrun However, computer networks were still limited, and media was usually delivered over non-streaming channels, such as download of a digital file from a remote web server that was then saved to a local drive on the end users computer or as a digital file stored and played back from CD-ROMs.

与流主要的技术问题是：·有足够的 CPU 电源及巴士的带宽来支持创建低滞后时间的所需的数据率·中断 OS 为防止缓冲区不足中的路径但，计算机网络仍然有限，和媒体通常送非流信道，该等作为数字从远程 Web 服务器的最终用户计算机上的本地驱动器，然后保存文件的下载或作为一种数字文件存储和播放从 CD-ROM 回来。

Its final target is to fully digitize the analogue receiver. The all digital receiver not just means digitizing every unit of the analogue receiver, but is a new receiver architecture. The two outstanding characters of this new architecture is: 1 It uses a high stable oscillator to generate a fixed frequency source. And both the sample signal and the local carrier required are obtained from it. 2 Once the received signal has been sampled by a high speed A/D converter, some digital signal processing algorithms will be used to realize all further processes, such as digital down-converting, match filtering, symbol timing, channel equalizing, carrier synchronizing, demodulating and decoding.

全数字接收机并不是简单地将传统的模拟接收机中所有的部件数字化的结果，而是一种全新的接收机体系结构，这种新的体系结构具有两个最为突出的特点：1）采用高稳定度晶体振荡器产生一个固定的本地频率源，接收机中所需的采样时钟信号和本地载波均从这一固定频率源得到；2）接收信号一旦经过高速模数转换后，余下的工作如频率变换、匹配滤波、定时同步、信道均衡、载波同步、符号解调、判决与译码等全部由数字信号处理算法来实现。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。