Analysts attribute the decline to such factors as advances in digital databases and communication systems.
分析师将这种下降归因于数字数据库和通信系统的进步等因素。
Reliability and speediness are contradictory in the digital communication systems which adopt error control in order to solve reliability .
在数字通信系统中可靠与快速往往是一对矛盾。为了解决可靠性，通信系统都采用了差错控制。
IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.
引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。
The modern communication theory is used in the analysis of imaging systems. The object information density model is built for analogue and digital image respectively.
应用现代通信理论对成像系统进行了分析，建立了模拟和数字图像的目标信息密度模型。
Picture Achieving and Communication Systems (PACS) is a hot-point in the field of processing and transmission of digital medical images.
医学影像归档及通信系统(PACS)是国内医学数字图像处理及传输领域的一个研究热点。
This paper proposes and discusses a blind equalization algorithm for multilevel digital communication systems.
本文提出并讨论了一个适用于多电平数字通信系统的盲均衡算法。
They could assemble the baseband part of several digital communication systems and have great significance in the future research and realization.
本论文对今后数字通信系统基带部分的研究和实现具有很强的借鉴意义。
Random-walk filter is widely used in Bit Synchronizer of modern telemetry system and other digital communication systems in order to enhance anti-jamming ability and reliability of a system.
在现代遥测系统和其它相关的数字通信系统的码同步器中广泛采用了随机徘徊滤波器技术以提高电路的抗干扰能力和系统工作的可靠性。
Reliability and speediness are contradictory in the digital communication systems which adopt error control in order to solve reliability.
在数字通信系统中可靠与快速往往是一对矛盾。为了解决可靠性，通信系统都采用了差错控制。
Serial communication is widely used in digital information systems and control systems.
串行通信在数字信息系统以及控制系统中得到了广泛的应用。
In this paper, the problem of blind identification and blind equalization of digital communication systems based on the second-order statistics (SOS) are addressed.
本文主要介绍了基于二阶统计量(SOS)的数字通信系统的盲辨识和盲均衡。
This course can be viewed as the prerequisite for the advanced courses such as linear systems, communication systems and digital signal processing.
本课程可做为线性系统、通讯系统与数位讯号处理等较进阶课程之基础课程。
Based on the narrow communication systems and disregarding memory effects, the paper describes an adaptive digital predistortion method which can restrain the noise effect caused by applications.
利用设计的实验平台，在窄带通信系统中不考虑记忆效应的情况下，提出了一种基于查询表的能够有效抑制器件噪声的自适应数字预失真方案。
Conventional multi channel speech communication recording systems consist of analog or digital tape recorder with large size and costs.
传统的多通道通信记录设备是由模拟磁带机或数字磁带机构成，设备庞大复杂，价格高昂。
The circuit types approaching the realization of the optimal transfer function of the receiver in low- and high-dispersion digital fiber-optic communication systems are given.
给出了在小色散和大色散光纤通信系统中近似实现光接收机最佳传递函数的电路型式；
Digital processing of signals has become an attractive option in mixed-signal systems, such as digital communication and medical instrumentation.
数字信号处理作为混合模拟信号系统中一种优良方法，在数字通信和医疗器械中得到了广泛采用。
Digital systems such as CAD are introduced to the design and product development processes. Technology is also essential for communication between retailers, manufacturers and consumers.
如CAD等数字系统被运用于设计和产品开发流程上，当然，零售商之间的通信技术也是必不可少的，包括制造商和消费者之间的也是如此。
A method is proposed for the approximation and realization of the optimal transfer function of the receivers in full-response digital fiber-optic communication systems.
本文提出了全响应数字光纤通信接收机最佳传递函数的逼近和实现方法；
The purpose of channel coding is to improve the transmission quality of digital communication systems, and it always is a research hotspot in communication systems.
信道编码一直是通信系统的研究热点，它的目的正是为了改善数字通信系统的传输质量。
The hardware equipments are suitable for different real-time digital processing and apply to radar, communication, remote, instruments, voice and intelligence systems.
该成果的硬件设备可适应不同的实时数字信号处理要求，应用于雷达、通讯、遥控、仪器、语音、智能等各种场合。
The coherent quadrature detector is one of the key technologies for providing high quality quadrature signal for digital signal processing in radar, sonar, communication and other systems.
正交相干检波是雷达、声纳和通信等系统中为数字信号处理提供高质量的正交信号的关键技术之一。
Thus the quality of transmission is dependent on the pulse repetition rate, and for digital communication systems these two variables may be interchanged most efficiently.
因而传输质量是取决于脉冲重复速率的。对于数字通信系统，这两个量之间极明显的互相影响着。
With the rapid development of signal processing technology and micro-electronics technology, Digital Beam Forming (DBF) technique has been widely researched in modern radar and communication systems.
随着信号处理技术和微电子技术的飞速发展，数字波束形成(DBF)技术在现代雷达和通信系统中的应用越来越广泛。
And wireless communication and digital audio decoding, is the next generation of wireless digital communication systems PCM audio.
而无线数字式音频传播与解码，是新一代的无线数字P CM音频传播系统。
Finally, we conclude with a brief discussion on a few key techniques and challenges of employing chaos-based digital communication systems in the future.
最后总结和讨论了未来混沌数字通信研究的几个关键技术和方向。
On the other hand, with the rapid development of VLSI, digital receiver and software defined radio have become a popular area in modern communication systems.
另外，随着集成电路技术的飞速发展，数字接收机和软件无线电也已经是现代通信研究的一个热点。
This thesis investigates some stability and robust control problems of networked control systems (NCSs), and some behavior of swarm under digital communication network.
本文研究了离散网络化控制系统(NCSs)的镇定、鲁棒控制以及数字网络下群体的行为。
This thesis investigates some stability and robust control problems of networked control systems (NCSs), and some behavior of swarm under digital communication network.
本文研究了离散网络化控制系统(NCSs)的镇定、鲁棒控制以及数字网络下群体的行为。
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