查询词典 digital signal processing

In order to realize the compatible communications system between digital TETRA and analogy MPT1327. Communications protocol between digital radio and control center is defined. Emergency call software flow for TETRA and MPT module is designed, and also state information sending and receiving for TETRA and MPT module is designed in this communication system. By comparing several solutions, switch methods between analogy TETRA communications and digital TETRA communications are designed including manual-switch and soft-switch. In the article, coding module of receiving and sending equipments in TATT analogy TETRA communications is described, so that it can be compatible with NOKIA network equipments and it also can improve the availability rate of the trunk system. In order to realize the integration of digital TETRA communication and analogy MPT1327 communications, double- frequency antenna system is researched.

通过几种车载电台解决方案比较，设计了相应的模拟集群通信系统与数字集群通信系统的切换方法，其中包括人工切换和软切换，实现了模拟与数字集群兼容的一体化移动列车调度电台解决方案；为了实现数字集群通信系统与模拟集群通信系统以及NOKIA与TAIT模拟集群通信系统之间的相互兼容，设计了新的数字车载电台与控制中心之间的通信协议；系统设计了用于数字集群通信模块的紧急呼叫通讯流程，以及设计了用于模拟集群通信模块状态信息发送与接收流程，以满足列车无线调度的运营要求；论文还论述了对TAIT模拟集群收发设备编码模块的改造，使之能与NOKIA的集群设备相兼容，提高了集群设备的利用率，为在NOKIA模拟集群通讯模块停产后寻找了一种可替代的兼容解决方案；为了实现数字集群通信系统与模拟集群通信系统设备的综合，论文还探讨了本工作所需专用的双频段的天线系统。

Taking use of the redundant data and randomicity of the digital products, the digital watermarking technology embeds the unperceivable but recognizable secret information--watermark containing the copyright information into the digital products, which can protect the copyright and integrality of the digital products.

数字水印技术利用数字作品中普遍存在的冗余数据与随机性，向数字作品中加入不易察觉但可以判定区分的秘密信息－水印，从而保护数字作品版权或完整性。

Altera Corporation system to the Cyclone FPGA series of digital platform, microprocessor, bus, Digital Frequency Synthesizer, memory and I / O interface hardware concentrated in an FPGA, the use of direct digital frequency synthesis technology and digital modulation waveforms required to achieve the rise, Using FPGA ROM storage of the DDS waveform table, and make full use of on-chip resources, improve the system's accuracy, stability and robustness.

系统以 ALTERA公司的 Cyclone 系列 FPGA 为数字平台，将微处理器、总线、数字频率合成器、存储器和 I/O 接口等硬件设备集中在一片 FPGA 上，利用直接数字频率合成技术、数字调制技术实现所要求波形的产生，用 FPGA 中的 ROM 储存 DDS 所需的波形表，充分利用片上资源，提高了系统的精确度、稳定性和抗干扰性能。

Digital clock is a kind of modern calculagraph which is composed of digital integrated circuit and can show decimal digital. Compared with mechanical clock, it is exact and can be see frankly. It is very popular in some public places, such as station, airport.Keywords: Multisim2001; Circuit Simulation; Digital Circuit; Answer Bell

数字钟是用数字集成电路构成的、用数码显示的一种现代计时器，与机械表比，它走时准、显示直观、无机械传动装置等特点，广泛应用于车站、码头、机场等公共场所。

Based on the ideas of undeniable digital signature and confirmer digital signature,a new zero-knowledge proof scheme of possessing a DSA digital signature is proposed which can be used to prevent the arbitrary distribution of digital signature.

引言 DSS[1] 是美国政府数字签名标准的缩写。DSS主要采用DSA数字签名算法[1] 及安全哈希函数SHA 1[2 ] 。

After detailed expatiation about digital output characteristic, the paper puts forward a set of digital interface scheme. Followingly, the digital interface based on IEC61850 standard is developed.At the bottom of this paper, a calibration experiment is carried out toward the designed digital interface.

在对电子式互感器数字输出特性做了详细阐述之后，提出了一套符合IEC 标准的数字接口实现方案，并研制了基于IEC61850 标准的数字接口。

Digital meter will be a trend with the development and generalization of sensor and digital display technology. Digital instruments have many inapproachable advantages. So in the paper, the design project of digital torque meter is presented.

由于传感器和数字显示技术的不断发展和进一步的推广，数字仪表将是未来的发展趋势，数字仪表具有机械式仪表无可比拟的优越性，因此本论文还给出了数字式液压扭矩表的设计方案。

In this paper, the principles and methods of digital image rectification based on digital photogrammetrical mapping system and the overlay of rectified stereo images with raster data or vector map data are described. Further more, under the platform of digital photogrammetrical system, the quick updating of 3D stereo digital relief map is realized.

本文论述了基于数字摄影测量系统的数字影像几何纠正的原理与方法，以及利用纠正后的立体影像和栅格或矢量地形图数据叠加，在数字摄影测量系统下，实现三维立体数字地形图快速修测。

Senior research and development of the talent of 25 per cent of the total number of staff. With the digital TV industry in rapid development, the company has in Israel SCOPUS, with the NTD, the United Kingdom TENDBERG Television, Shenzhen strong, the United States - TU, digital video, digital television, such as Haier Group forefront of vendors in-depth cooperation, as a present Sichuan Province, the largest cable digital television system integrators.

随着数字电视产业的迅猛发展，公司先后于以色列SCOPUS、永新同方、英国TENDBERG Television、深圳茁壮、美国恩讯、数码视讯、海尔集团等数字电视前沿厂商进行了深度合作，截止目前成为四川省内最大的有线数字电视系统集成商。

Bei Kenda Technology is a leading interactive digital TV headend overall value-added business solutions provider, the company products are widely involved in interactive digital television platform, digital TV value-added services, high-definition digital TV broadcast and home entertainment solutions in areas such as information .

贝肯达科技是领先的互动数字电视增值业务头端整体解决方案供应商，公司产品广泛涉及互动数字电视平台、数字电视增值业务、高清数字电视播出及家庭娱乐信息解决方案等领域。

"Yes, now you can give yourself airs," she said, you have got what you wanted.

"对了，您现在高兴了，"她说道，这是您所期待的。

Then the LORD said to me: Rebel Israel is inwardly more just than traitorous Judah.

上主于是对我说：＂失节的以色列比失信的犹大，更显得正义。