Rapid progress in information and communications technology (ICT) induces improved and new telecommunicATions services and contributes greatly to society in general and to vendors and network and service providers. In addition to existing services such as telephony or leased line services, spread of the Internet, the Internet Protocol (IP) phone, and new communications services like IPTV are making great progress with the development of digital subscriber lines (DSL) and high - speed communications technologies like fi ber to the home (FTTH).
標(biāo)簽： telecommunicATions Networks
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Each of us is interested in optimization, and telecommunicATions. Via several meetings, conferences, chats, and other opportunities, we have discovered these joint interests and decided to put together this book.
標(biāo)簽： telecommunicATions optimization heuristics
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Changes in telecommunicATions are impacting all types of user group, which include business users, traveling users, small and home offices, and residential users. The acceptance rate of telecom- munications and information services is accelerating significantly. Voice services needed approximately 50 years to reach a very high teledensity; television needed just 15 years to change the culture and lives of many families; the Internet and its related services have been penetrating and changing business practices and private com- munications over the last 2 to 3 years.
標(biāo)簽： telecommunicATions Handbook The
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
The dictionary definition of telecommunicATions is ‘communication over long distance by cable, telegraph, telephone or broadcasting’, but since its initiation over 100yearsagothingshavemovedrapidly.telecommunicATionsisnowaverycomplex industrywithmanydifferentpressures,operatinginahighlydynamic environment.It is best viewed as part of a wider industry known as information and communication technology (ICT). The purpose of this chapter is to explain where telecommunication fits in, to highlight some of the complexities – hopefully to simplify them – and to position the industry in today’s dynamic business environment.
標(biāo)簽： telecommunicATions Understanding Business
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
telecommunicATions is today widely understood to mean the electrical means of communicating over a distance. The first form of telecommunicATions was that of the Telegraph, which was invented quite independently in 1837 by two scientists, Wheatstone and Morse. Telegraphy was on a point-to-point unidirectional basis and relied on trained operators to interpret between the spoken or written word and the special signals sent over the telegraph wire. However, the use of telegraphy did greatly enhance the operations of railways and, of course, the dissemination of news and personal messages between towns.
標(biāo)簽： telecommunicATions Understanding Networks
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Many telecommunicATions and computing applicationsneed high effi ciency step-down DC/DC converters thatcan operate from a very low input voltage. The highoutput power synchronous controller LT3740 is idealfor these applications, converting input supplies rangingfrom 2.2V to 22V to outputs as low as 0.8V with loadcurrents from 2A to 20A. Applications include distributedpower systems, point-of-load regulation and conversionof logic supplies.
上傳時(shí)間： 2013-11-05
上傳用戶：zhf01y
In an increasing trend, telecommunicATions, networking,audio and instrumentation require low noise power supplies.In particular, there is interest in low noise, lowdropout linear regulators (LDO). These components powernoise-sensitive circuitry, circuitry that contains noisesensitiveelements or both. Additionally, to conserve power,particularly in battery driven apparatus such as cellulartelephones, the regulators must operate with low input-tooutputvoltages.1 Devices presently becoming availablemeet these requirements (see separate section, “A Familyof 20mVRMS Noise, Low Dropout Regulators”).
標(biāo)簽： 低噪聲 低壓差穩(wěn)壓器 性能
上傳時(shí)間： 2013-10-30
上傳用戶：yeling1919
Abstract: The application note addresses how G3-PLC, a powerline communications protocol approvedby the International telecommunicATions Union (ITU), enables mesh networking in advanced metering
標(biāo)簽： 網(wǎng)狀網(wǎng)絡(luò) 應(yīng)用筆記 通信
上傳時(shí)間： 2013-11-17
上傳用戶：erkuizhang
In today’s world of modular networking and telecommunicATions design, it is becomingincreasingly difficult to keep alignment with the many different and often changing interfaces,both inter-board and intra-board. Each manufacturer has their own spin on the way in whichdevices are connected. To satisfy the needs of our customers, we must be able to support alltheir interface requirements. For us to be able to make products for many customers, we mustadopt a modular approach to the design. This modularity is the one issue that drives the majorproblem of shifting our bits from one modular interface to another.
標(biāo)簽： 150 WP 兆兆 網(wǎng)絡(luò)
上傳時(shí)間： 2013-11-25
上傳用戶：suicone
Abstract: This article describes the Antenna Interface Standards Group (AISG) standard in telecommunicATions and details itshardware implementation. It explains how a fully integrated transceiver such as the MAX9947 can help reduce space and cost, andsolve bus arbitrations in base-station tower equipment.
標(biāo)簽： AISG 硬件 分立收發(fā)器 控制系統(tǒng)
上傳時(shí)間： 2014-12-30
上傳用戶：wangchong
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