❶ 通信工程專業英語論文翻譯
藍牙技術允許信息存儲在手機上可以顯示在電視上，也可以變換分析的信息，以便在電腦上聽聲。
藍牙技術的傳輸速率設計到1MHz。實現全雙工通信的時間division.The的協議是區為基礎的電路交換和分組交換的組合。
通過無線晶元接收器與藍牙技術的電子產品能夠在十公尺，可連接傳輸速度可以達到每秒1萬億位元組。
藍牙技術是一種新的無線傳輸，在1998年推出。它實際上取代數據電纜的短距離無線通信技術，通過實現低帶寬的點至點廣播，或點對多點鏈路之間的信息交流。
點，以點傳輸，無線紅外傳輸是一種，它是必要的，在准確的方向，而不是很遠的地方。如果在中間有障礙物時，它不能穿過牆壁，且無法控制信息傳輸的速度。
❷ 哪裡可以找到通信工程專業的英語論文，已經翻譯成中文的那種
一般英文谷歌學術，中文知網。
❸ 跪求通信工程方面中英對照文獻資料，10000字以上
找本英文書，再找個中文譯本，就好了嘛。
那個奧本海姆的信號與系統，就有中文和英文的
❹ 求通信工程畢業設計的外文翻譯和文獻綜述~
翻譯的話只能下了自己翻了，EI肯定有。
綜述的話在CNKI上下就行了，反正找標題結尾有綜述倆字的文章。
❺ 求電子通信類的英文參考文獻五篇左右 要求標明 標題 作者 書或者雜志 最好有年限
Features
• CSA/NRTL Approved
• Used for non-intrusive configuration and calibration of SEC 2000 gas detectors
• Calibrates, checks and correlates data from any SEC detector on the data highway
• Bi-directional infrared communication when pointed at any SEC 2000 display board
• Intrinsically safe menu driven device
• Can communicate with SEC 1500, SEC 2000 and SEC DAIM devices
Operation
The SEC 2500 Hand Held Programmer transmits and receives infrared light from the front of the housing. The infrared light is used to establish non-intrusive communication with any SEC 2000 that is equipped with a display mole. When communicating with the SEC 2000, the SEC 2500 must be pointed directly at the display mole of the SEC 2000 which can be up to 15 feet away.
The Hand Held Programmer can communicate with any SEC 2000 gas detector on the same RS-485 network once infrared communication is established. Data exchange, using the infrared link, occurs at a rate of 300 baud.
The programmer has a socket at the bottom of the unit for connecting to a Data Communication Cable (P/N 147-1000C). The Data Communication Cable enables a hardwire communication connection to all SEC devices.
Once communication is established, the devices can be checked, calibrated and information can be correlated with a touch of the keypad located on the SEC 2500 Hand Held Programmer. The SEC 2500 Hand Held Programmer is certified for use in hazardous areas.
The SEC 4100 System Monitor is a multi-channel microprocessor based controller designed to monitor the gas and fire detection network.
Each SEC 4100 System Monitor provides a digital display of each device and alarm level present at each detector. Initiates alarms when any device senses a dangerous condition.
The SEC 4100 System Monitor has 2 sets of 「Data A」 and 「Data B」 terminals, labeled LAN X and LAN Y. This allows the detectors to be connected in a compete loop. The SEC 4100 will transfer communication between the LAN X and LAN Y highway when a communication fault is detected.
The SEC 4100 System Monitor can be used with SEC DAIM Moles to add other types of devices to the network. See SEC 4853 DAIM data sheet for further information.
The SEC 4100 System Monitor can also be used in conjunction with the SEC 4850 Repeater, SEC 4851 Expansion Relay Controller, SEC 4852 High Density Display and SEC Supervision Plus software package.
Other Procts Available:
Infrared Hydrocarbon Gas Detectors
Explosion Proof Gas Detectors
Non-Explosion Proof Gas Detectors
4-20 mA Gas Detectors
Data Logging/Graphics Software Packages
Optical UV/IR Flame Detectors
Fire Suppression Aerosol Generators
Portable Automatic Fire Fighting Systems
Halotron Systems
Twin Agent Units
Dry Chemical Mobile and Stationary Units
❻ 通信類英文論文、英文文獻
基於WIN CE的ADSL線路參數研究
ADSL line parameters research based on WIN CE
http://books.google.com.sg/books?hl=en&id=jDmiKarm_EMC&dq=ADSL&printsec=frontcover&source=web&ots=oJXbatzNWO&sig=fyomvlADYeB7NRS2gjTJAfpSapQ
http://books.google.com.sg/books?hl=en&id=HsXaS5y6SZoC&dq=ADSL&printsec=frontcover&source=web&ots=EdCHuJT2WG&sig=QnNSogd7OIvYS7Z6Vr2UYal4iw8
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Windows CE (also known officially as Windows Embedded CE since version 6.0[2][3], and sometimes abbreviated WinCE) is a variation of Microsoft's Windows operating system for minimalistic computers and embedded systems. Windows CE is a distinctly different kernel, rather than a trimmed-down version of desktop Windows. It is not to be confused with Windows XP Embedded which is NT-based. It is supported on Intel x86 and compatibles, MIPS, ARM, and Hitachi SuperH processors.
Features
Windows CE is optimized for devices that have minimal storage—a Windows CE kernel may run in under a megabyte of memory. Devices are often configured without disk storage, and may be configured as a 「closed」 system that does not allow for end-user extension (for instance, it can be burned into ROM). Windows CE conforms to the definition of a real-time operating system, with a deterministic interrupt latency. It supports 256 priority levels and uses priority inheritance for dealing with priority inversion. The fundamental unit of execution is the thread. This helps to simplify the interface and improve execution time.
Microsoft has stated that the 『CE』 is not an intentional initialism, but many people believe CE stands for 『Consumer Electronics』 or 『Compact Edition』; users often disparagingly called it 「Wince」.[4] Microsoft says it implies a number of Windows CE design precepts, including 「Compact, Connectable, Compatible, Companion, and Efficient.」[5] The first version, known ring development under the codename 「Pegasus」, featured a Windows-like GUI and a number of Microsoft's popular applications, all trimmed down for smaller storage, memory, and speed of the palmtops of the day.
Since then, Windows CE has evolved into a component-based, embedded, real-time operating system. It is no longer targeted solely at hand-held computers. Many platforms have been based on the core Windows CE operating system, including Microsoft's AutoPC, Pocket PC 2000, Pocket PC 2002, Windows Mobile 2003, Windows Mobile 2003 SE, Windows Mobile 5.0, Windows Mobile 6, Smartphone 2002, Smartphone 2003 and many instrial devices and embedded systems. Windows CE even powered select games for the Sega Dreamcast, was the operating system of the controversial Gizmondo handheld, and can partially run on modified Microsoft Xbox game consoles.
A distinctive feature of Windows CE compared to other Microsoft operating systems is that large parts of it are offered in source code form. First, source code was offered to several vendors, so they could adjust it to their hardware. Then procts like Platform Builder (an integrated environment for Windows CE OS image creation and integration, or customized operating system designs based on CE) offered several components in source code form to the general public. However, a number of core components that do not need adaptation to specific hardware environments (other than the CPU family) are still distributed in binary form only.
Development tools
Visual Studio
Late versions of Microsoft Visual Studio support projects for Windows CE / Windows Mobile, procing executable programs and platform images either as an emulator or attached by cable to an actual mobile device. A mobile device is not necessary to develop a CE program. The .NET Compact Framework supports a subset of the .NET Framework with projects in C# and VB.NET, but not Managed C++.
Platform Builder
This programming tool is used for building the platform (BSP + Kernel), device drivers (shared source or custom made) and also the application. This is a one step environment to get the system up and running. One can also use Platform Builder to export an SDK (standard development kit) for the target microprocessor (SuperH, x86, MIPS, ARM etc.) to be used with another associated tool set named below.
Embedded Visual C++ (eVC)
The Embedded Visual C++ tool is for development of embedded application for Windows CE based devices. This tool can be used standalone using the SDK exported from Platform Builder or using the Platform Builder using the Platform Manager connectivity setup.
Relationship to Windows Mobile, Pocket PC, and SmartPhone
Often Windows CE, Windows Mobile, and Pocket PC are used interchangeably. This practice is not entirely accurate. Windows CE is a molar/componentized operating system that serves as the foundation of several classes of devices. Some of these moles provide subsets of other components' features (e.g. varying levels of windowing support; DCOM vs COM), others which are mutually exclusive (Bitmap or TrueType font support), and others which add additional features to another component. One can buy a kit (the Platform Builder) which contains all these components and the tools with which to develop a custom platform. Applications such as Excel Mobile/Pocket Excel are not part of this kit. The older Handheld PC version of Pocket Word and several other older applications are included as samples, however.
Windows Mobile is best described as a subset of platforms based on a Windows CE underpinning. Currently, Pocket PC (now called Windows Mobile Classic), SmartPhone (Windows Mobile Standard), and PocketPC Phone Edition (Windows Mobile Professional) are the three main platforms under the Windows Mobile umbrella. Each platform utilizes different components of Windows CE, as well as supplemental features and applications suited for their respective devices.
Pocket PC and Windows Mobile is a Microsoft-defined custom platform for general PDA use, and consists of a Microsoft-defined set of minimum profiles (Professional Edition, Premium Edition) of software and hardware that is supported. The rules for manufacturing a Pocket PC device are stricter than those for procing a custom Windows CE-based platform. The defining characteristics of the Pocket PC are the digitizer as the primary Human Interface Device and its extremely portable size.
The SmartPhone platform is a feature rich OS and interface for cellular phone handsets. SmartPhone offers proctivity features to business users, such as email, as well as multimedia capabilities for consumers. The SmartPhone interface relies heavily on joystick navigation and PhonePad input. Devices running SmartPhone do not include a touchscreen interface. SmartPhone devices generally resemble other cellular handset form factors, whereas most Phone Edition devices use a PDA form factor with a larger display.
Windows Mobile 5 supports USB 2.0 and new devices running this OS will also conform to the USB Mass Storage Class, meaning the storage on PPC can be accessed from any USB-equipped PC, without requiring any extra software, except requiring a compliant host. In other words, you can use it as a flash drive.
Competing procts
Competitors to consumer CE based PDA platforms like Pocket PC – the main application of Windows CE – are Java, Symbian OS, Palm OS, iPhone OS and Linux based packages like Qtopia Embedded Linux environment from Trolltech, Convergent Linux Platform from a La Mobile, and Access Linux Platform from Orange and Access.
The secondary usage of CE is in devices in need of graphical user interfaces, (point of sale terminals, media centers, web tablets, thin clients) as the main selling point CE is the look and feel being similar to desktop Windows. The competition is Windows XP, Linux and graphical packages for simpler embedded operating systems.
Being an RTOS, Windows CE is also theoretically a competitor to any realtime operating system in the embedded space, like VxWorks, ITRON or eCos. The dominating method, however, of mixing Windows look and feel with realtime on the same hardware, is to run double operating systems using some virtualization technology, like TRANGO Hypervisor from TRANGO Virtual Processors or Intime from TenAsys in the case of Windows, and OS Ware from VirtualLogix, Padded Cell from Green Hills Software, OKL4 from Open Kernel Labs, TRANGO Hypervisor from TRANGO Virtual Processors, RTS Hypervisor from Real-Time Systems or PikeOS from Sysgo, in case of the competition.
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Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. It does this by utilizing frequencies that are not used by a voice telephone call. A splitter - or microfilter - allows a single telephone connection to be used for both ADSL service and voice calls at the same time. Because phone lines vary in quality and were not originally engineered with DSL in mind, it can generally only be used over short distances, typically less than 3mi (5.5 km) [William Stallings' book].
At the telephone exchange the line generally terminates at a DSLAM where another frequency splitter separates the voice band signal for the conventional phone network. Data carried by the ADSL is typically routed over the telephone company's data network and eventually reaches a conventional internet network. In the UK under British Telecom the data network in question is its ATM network which in turn sends it to its IP network IP Colossus.
The distinguishing characteristic of ADSL over other forms of DSL is that the volume of data flow is greater in one direction than the other, i.e. it is asymmetric. Providers usually market ADSL as a service for consumers to connect to the Internet in a relatively passive mode: able to use the higher speed direction for the "download" from the Internet but not needing to run servers that would require high speed in the other direction.
There are both technical and marketing reasons why ADSL is in many places the most common type offered to home users. On the technical side, there is likely to be more crosstalk from other circuits at the DSLAM end (where the wires from many local loops are close to each other) than at the customer premises. Thus the upload signal is weakest at the noisiest part of the local loop, while the download signal is strongest at the noisiest part of the local loop. It therefore makes technical sense to have the DSLAM transmit at a higher bit rate than does the modem on the customer end. Since the typical home user in fact does prefer a higher download speed, the telephone companies chose to make a virtue out of necessity, hence ADSL. On the marketing side, limiting upload speeds limits the attractiveness of this service to business customers, often causing them to purchase higher cost Digital Signal 1 services instead. In this fashion, it segments the digital communications market between business and home users
How ADSL works
On the wire
Currently, most ADSL communication is full plex. Full plex ADSL communication is usually achieved on a wire pair by either frequency division plex (FDD), echo canceling plex (ECD), or time division plexing (TDD). FDM uses two separate frequency bands, referred to as the upstream and downstream bands. The upstream band is used for communication from the end user to the telephone central office. The downstream band is used for communicating from the central office to the end user. With standard ADSL (annex A), the band from 25.875 kHz to 138 kHz is used for upstream communication, while 138 kHz – 1104 kHz is used for downstream communication. Each of these is further divided into smaller frequency channels of 4.3125 kHz. During initial training, the ADSL modem tests which of the available channels have an acceptable signal-to-noise ratio. The distance from the telephone exchange, noise on the copper wire, or interference from AM radio stations may introce errors on some frequencies. By keeping the channels small, a high error rate on one frequency thus need not render the line unusable: the channel will not be used, merely resulting in reced throughput on an otherwise functional ADSL connection.
Vendors may support usage of higher frequencies as a proprietary extension to the standard. However, this requires matching vendor-supplied equipment on both ends of the line, and will likely result in crosstalk issues that affect other lines in the same bundle.
There is a direct relationship between the number of channels available and the throughput capacity of the ADSL connection. The exact data capacity per channel depends on the molation method used.
[edit] Molation
ADSL initially existed in two flavours (similar to VDSL), namely CAP and DMT. CAP was the de facto standard for ADSL deployments up until 1996, deployed in 90 percent of ADSL installs at the time. However, DMT was chosen for the first ITU-T ADSL standards, G.992.1 and G.992.2 (also called G.dmt and G.lite respectively). Therefore all modern installations of ADSL are based on the DMT molation scheme.
Annexes J and M shift the upstream/downstream frequency split up to 276 kHz (from 138 kHz used in the commonly deployed annex A) in order to boost upstream rates. Additionally, the "all-digital-loop" variants of ADSL2 and ADSL2+ (annexes I and J) support an extra 256 kbit/s of upstream if the bandwidth normally used for POTS voice calls is allocated for ADSL usage.
While the ADSL access utilizes the 1.1 MHz band, ADSL2+ utilizes the 2.2 MHz band.
The downstream and upstream rates displayed are theoretical maxima. Note also that because Digital subscriber line access multiplexers and ADSL modems may have been implemented based on differing or incomplete standards some manufacturers may advertise different speeds. For example, Ericsson has several devices that support non-standard upstream speeds of up to 2 Mbit/s in ADSL2 and ADSL2+.
[edit] Installation issues
Due to the way it uses the frequency spectrum, ADSL deployment presents some issues. It is necessary to install appropriate frequency filters at the customer's premises, to avoid interferences with the voice service, while at the same time taking care to keep a clean signal level for the ADSL connection.
In the early days of DSL, installation required a technician to visit the premises. A splitter was installed near the demarcation point, from which a dedicated data line was installed. This way, the DSL signal is separated earlier and is not attenuated inside the customer premises. However, this procere is costly, and also caused problems with customers complaining about having to wait for the technician to perform the installation. As a result, many DSL vendors started offering a self-install option, in which they ship equipment and instructions to the customer. Instead of separating the DSL signal at the demarcation point, the opposite is done: the DSL signal is "filtered off" at each phone outlet by use of a low pass filter, also known as microfilter. This method does not require any rewiring inside the customer premises.
A side effect of the move to the self-install model is that the DSL signal can be degraded, especially if more than 5 voiceband devices are connected to the line. The DSL signal is now present on all telephone wiring in the building, causing attenuation and echo. A way to circumvent this is to go back to the original model, and install one filter upstream from all telephone jacks in the building, except for the jack to which the DSL modem will be connected. Since this requires wiring changes by the customer and may not work on some household telephone wiring, it is rarely done. It is usually much easier to install filters at each telephone jack that is in use.
❼ 關於通訊技術的英語論文一篇
As we all know ,communication has been playing an important part in people『s life. As far as I know there are many kinds of communication, among them mail, telephone and computer are most commonly used.Writing letters is one of them. People use it to exchange information, ideas and thoughts. Slow as the mail is, it is the cheapest means of communication. The second kind is the telephone. By using telephone, people can hear each other even if they are far away. With the development of modern science and technology,the computer has come into being. Communication with computers is fast and easy. In this way, people can send E-mail to each other.
In a word, mail, telephone and computer all help to bring people all over the world closer.
❽ 求一篇近年關於通信工程的外文期刊，5000字，做畢業論文的翻譯，只剩這點分了，見諒
有一份的。，、