查询词典 digital transmission

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The simulation results show that the ISI can be eliminated effectively with adaptable equalizers in baseband transmission ,and the digital communication system takes.

仿真结果表明，自适应均衡器能够有效地消除码间干扰，增强基带传输系统的传输特性。

Suitable for digital cameras, cellular phones, DVD, HVD precision electronic products, computer communication and electrical wire and cable, high-frequency electromagnetic interference, transmission.

适应于数码相机，手机，DVD，HVD精密电子产品，电脑通信，电线，电缆，高频传输时，隔离电磁波干扰。

Use way: suitable for digital cameras, cellular phones, DVD, HVD precision electronic products, computer communication and electrical wire and cable, high-frequency electromagnetic interference, transmission.

用 途：适应于数码相机，手机，DVD，HVD精密电子产品，电脑通信，电线，电缆，高频传输时，隔离电磁波干扰。

Imbursed by the sub-item"Research on System Framework of Joint Source-Channel Coding under Wireless Circumstance"of national high-tech research and development plan(863 plan)"Digital Audio, Video Encoding, Transmission, Testing and Applying Model"(No.2002AA119010), and the great item"Research of Future Communication System Fundamental Theory and Technology (No.60496315)", the dissertation studies several key techniques of Low-Density Parity-Check Codes that were considered much in error correction codes field.

本文正是在国家高技术研究发展计划(863计划)&数字音视频编码、传输、测试与应用示范&(No.2002AA119010)的子课题&基于无线环境的联合信源信道系统框架研究&、国家自然科学基金重大项目&未来移动通信系统基础理论与技术研究(No.60496315)&等研究项目的资助下，对近年来在纠错码领域表现抢眼的低密度校验码(Low-Density Parity-Check Codes，LDPC)的若干关键技术展开了研究。

Voice requests could be fed into a personal digital assistant , for example, which could compress the speech for transmission via radio or other medium at 4 kilobits/sec across the Internet.

例如，声音请求可以送进&个人数字助理&，该装置对话音进行压缩，以便在Internet网上以4Kb/s的速度通过无线电或其它介质传输。

Meanwhile, there need a further study in digital TV MUDS transmission system in countryside and outlying district.

本文结合四川宜宾广播电视局的数字电视MUDS系统及工程项目情况，提出了一个实际的应用解决方案，为边远地区和分散的农村地区的数字电视系统的实施提供一个理想传输的选择平台，解决了边远地区和分散的农村地区的用户收看数字电视节目的困难。

Based on an analysis on the present situation and development of three kinds of signal systems (the point system based on interrogator responsor, the quasi moving block system based on digital track circuit and the moving block system based on wireless data transmission) in urban rail transit, some suggestions on the localization of signal system of urban rail transit are put forward.

在分析三种城市轨道交通信号系统制式(基于查询应答器的点式系统、基于数字轨道电路的准移动闭塞和基于无线数据传输的移动闭塞)的现状和发展基础上，对实现我国城市轨道交通信号系统国产化提出建议。

The stability, flexibility and transmission efficiency of system can be improved by using digital technology too.

数字技术相比于模拟技术明显有利于增强系统的稳定性和灵活性，并能有效的提高传输效率和保证传输性能。

In the last new years , as the demands of wireless communication system grows rapidly , the bands of microwave frequency had been saturated with various communication applications . To achieve wider spectrum for high-speed and high-capacity transmission , bands of millimeter-wave frequency are the solution of this problem . The advantage of MMW wireless communication systems is wider bandwidth comparing with microwave communication systems . To utilize the spectrum efficiently , many methods of complexly digital modulation is proposed . The more complex modulation , the higher linearity is required , and more various phase of signals are required to accomplish process of modulation . Therefore high-linearity and quadrature-phase modulator and demodulator are the emphasis of this thesis . For high level of integration , high performance and low cost , this chip is fabricated by the complementary oxide semi-conductor 0.13um process . A compact size of direct down-conversion and direct up conversion circuits will be presented in this thesis .

近年来随著无线通讯产业的蓬勃发展，微波频带已经趋近於饱和，为了追求更宽的频谱来达到更快传输速率及高资料容量的传输，宽频的毫米波频段提供了解决此问题的途径，毫米波无线通讯系统提供了相对於微波通讯系统宽频的优点，且为了更有效的使用频谱，各种不同且复杂的数位调变方式及方法被发表出来，越复杂的调变方式其所需的线性度越高，且需要更多不同的相位讯号来完成调变的过程，因此高线性度及四相位的调变及解调器将是此篇论文的研究重点，为了达到高整合性，高效能，及低成本的电路设计，我门利用互补式金氧半导体制程来完成此电路设计，因此一小面积的直接降频(Direct down-conversion)及直接升频(direct up-conversion)电路将在文中介绍。

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。