数字信道

It is strongly adaptive to improve correctness and efficiency of digital communication channel.

在数字通信信道中，非线性畸变[4]是一个比较棘手的研究课题。

A method for selecting a digital control channel for a mobile station operating in a cellular system.

一种用于为在蜂窝系统中工作的移动站选择一个数字控制信道的方法。

With the development of the techniques of optical storage and digital recording, many advanced optical storage and digital recording channels have been proposed, which have been forwarding the research of the signal processing and coding.

随着光存储技术的不断发展，许多先进的光存储和数字记录信道被相继提出，从而推动了信号处理与编码技术的研究。

As a private mobile communication system, The digital trunkingmobile communication system was boomed in 1990's, and before this, the appliedprivate mobile communication systems in market are almost the analog systemwith analog voice and digital signalling. And there are no data referring to thesystem design and parameters chosen. It includes the wireless channel accessalgorithm of the mobile terminals, single base station capacity in large regional networks, link designing schemes between the switching control center and basestation as well as the study of the service quality for the multiple traffic. Theseindispensable parameters in design a digital trunking communication system arestudied in this dissertation and some instructive achievements can be got. To provethe correction of the theoretical study, the result was tested with the popularsystem of pan-European digital trunking communication system.

数字集群移动通信系统是九十年代中、后期兴起的专用移动通信系统的一种新体制，在此之前国际、国内市场使用的都是数字信令、模拟话音集群移动通信系统其涉及领域是模拟体制，对数字集群的系统设计的有关参数、方法等的选用及其性能表现并无成熟的文献可供参考，如移动终端的无线信道接入算法、大区组网单基站系统的容量、基站和交换控制中心间的链路设计和多业务种类的服务质量等都是数字集群基站子系统进行设计和开发必须解决的关键技术。

The company has participated in the development of many national standards on digital television broadcasting.

公司在数字电视技术及信道传输领域做了大量的工作并取得了可观的成果。

In chapter 3, the basic theory of channel equalization and channel identification is discussed.

本文的第二章给出数字电视地面广播信道的一般性模型。

In chapter 4, the channel estimation and equalization methods in real DTTB receivers are introduced irrespectively with ATSC-8VSB and DVB-T.

第四章以ATSC-8VSB和DVB-T为例，分别介绍了单载波和多载波方案数字电视地面广播接收机中常用的信道估计与均衡算法。

In chapter five, the base band signal process of CDMA base station simulator system is introduced, including channel coding and decoding, interleave and disinterleave, PN sequence generator, orthogonal spread spectrum and quadrature Spreading, scrambling code, power control, digital forming filter, the capture and track of PN code, dispreading and demodulation, etc. Some FPGA design graphic and waveform simulation of base band transmitter module is given and realization algorithm of base band receiver is discussed in detail.

第五章介绍了CDMA基站仿真系统的基带信号处理过程，包括信道编译码、交织与去交织、PN码发生器、正交扩频与四相扩频、扰码、功率控制、数字成形滤波器、PN码的捕获与跟踪、解扩与解调等，并给出了基带发射机模块的部分FPGA设计原理图和波形仿真，详细论述了基带接收机模块的实现算法。

The method includes the process of performing a quick reselection on available digital control channels at points in the selection process, when a first DCCH that meets received signal strength criteria at the mobile station has been located using a conventional process, but a more preferable second DCCH could possibly still be found.

该方法包括在采用常规处理已找到在移动站满足接收信号强度标准的第一DCCH，但仍发现可能更好的第二DCCH时，在选择过程中在这些这些点对可使用的数字控制信道进行快速重新选择。

In order to made realiable communication in low voltage power line for its scurviness of channel characteristic, the communication circuit in our paper adopts the technology of double-frquency spread spectrum based on DSP emused fast CPU.

为了在信道特性十分恶劣的低压电力线上实现可靠通信，本文采用双路扩频技术通过快速CPU用软件进行数字信号处理来实现调制解调。

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。