Continue the intersection of resurgence and communication bear the weight of network 7 products, succeed in, finish the intersection of EANTC and many interoperability, MPLS-TP of manufacturer, after the test will it be January 2010, will it be August 2010, the intersection of resurgence and communication bear the weight of the intersection of network and the intersection of products and family, have an effect again, 11 the intersection of star and products join by the intersection of European and the intersection of high level network and test center ‘ ” EANTC” ) Many manufacturer’s apparatus interconnection tests of organizing.
European high level network test center (” EANTC” ) It is global maximum, most famous bearing the weight of the technological intercommunication centre of the apparatus of the network, its technical force is rich, have very strong authoritativeness and appeal, join the famous communication manufacturer’s producer o... Read more
Recently, Britain’s communication and media regulator Ofcom show, Ofcom is accelerating 2.1GHz and 800MHz spectral auction, move the spectral competitive bidding plan of network insertion to already issue, it is estimated formal frequency spectrum is auctioned and held in 2011.
Ofcom aims at auctioning promoting to use frequency spectrum to come in a flexible way through new frequency spectrum ” Support to move innovation and competition in technology ” ,Improve the village and cover the state, accelerate moving broadband and developing and improving the indoor and covering the state. The development of this job means Britain can pass and obtain new frequency spectrum to move the operator, promote the Off-The-Shelf wireless broadband service quality. Operator and analyst think, the operator has been already very urgent to the new spectral demand, they need the frequency spectrum to offer better services to user.... Read more
Different from general business, the characteristic business that the video flows, the data bulk is very large. For example, SIF form, NTSC, colored, 4 in the digital televised image: 4: 4 is sampled, the data bulk of every frame is 2028Kb, the flowrate reachable 60.8Mb of data per second; CCIR form, PAL, 4: 4: Flowrate reachable 148.8Mbps of data of 4 colored videos sampled. Experiment show, 176* 144 the intersection of YUV and primitive video transfer rate 3 about frames per second at LAN of 10Mbps. It is obvious, the transmissive result on Internet of video not compressed can’t be tolerated, and will swallow up Internet resources very easily, cause network congestion to even collapse. So, the first step of IP video communication is video compression.
The coded theoretical basis of video compression is an information theory. Compression is to remove redundant information from the time domain, null field two respect, the definite information that can be extrapolated soon is r... Read more
China will have already become car manufacturer and market of global maximum in 2009, as China becomes car making country and consumer market of global maximum, and the value that the local automaker of China desires most ardently and promotes the middle-grade car by electronic system upgrade of the car, space and prospect of market of Telematics service demand are very enormous.
Global Telematics market scale is 22,100 million dollars in 2008, have already risen to 27,400 million dollars by 2009. Telematics market share will be roughly in 2009: 45.3% of U.S.A., 32.3% of Europe, 22.4% of Asia.
The car electronic department general manager Xu Peng of CCID Consulting Co., Ltd. has been in the international Telematics industry alliance (ITIF) recently Say on three aqueous inaugural meeting and 2010 first international Telematics industry development summit forums in Shenzhen: “Developing countries and Telematics market of the new developing market will increase fas... Read more
According to investigation of Linley Group Company, in the first half of the year, the wired semi-conductive market for communication increased by 20%, among them Ethernet chip has the quickest speedup, the income will increase to 40% in advance in 2010. Meanwhile, from 2009 to 2014, the annual compound growth rate of sales amount of the communication processor of polykaryon will be up to 28%, and the annual compound growth rate of network handler will be also up to 11%.
Such as the investment of IPTV and 4G cellular network, can include the fiber optic net, the Home Networking with higher speed, development of FPGA and embedded processor. Pass a large number of construction and the intersection of cloud and assumed development of data centre, can to the intersection of 40G/100G and development of Ethernet.
“With the development of new network technique, the recovery level of the market totally compounds our expectancy. ” Linley senior analyst... Read more
China’s communication president of electronec industries association Wang BingKe was held in Shenyang on the 18th ” The international mobile phone fair news briefing of first China Shenyang ” On if you can’t show by 3G with China what has been researched and developed, have industry the completions of chain more standard to merge as three network, Chinese mobile phone industry has already entered 3G era in an all-round way, has estimated the mobile phone output will exceed 700 million this year, accounts for 60% of the output of the world.
Statistics reveal, industry’s value added of China’s communication will increase by 7% compared with the same period of last year in 2009, among them produce 620 million mobile phones, increase 9.8% compared with the same period of last year, China become world cell-phone produce big countries and the big consuming country all one’s life already; The business income of China’s communicati... Read more
O Foreword
Profibus is open and having nothing to do, having no protective standard of intellectual property right with manufacturers. So anyone can obtain this standard and design their own software and hardware solutions in the world. The development of Pro-fibus-DP communication interface has two kinds of schemes that are chosen: One-chip computer + software; One-chip computer +Profibus communication chip ASIC.
It is realized that Profibus-DP agreement is totally communicated ASIC by Profibus in the scheme 2, the one-chip computer mainly deals with the user program. So the intersection of scheme and 2 relatively little and a lot of development cycle, this text realize the intersection of Profibus and design of communication interface by one-chip computer +Profibus communication ASIC.
1 Profibus-DP basic characteristic
Profibus includes three compatible series: Profibus-FMS, Profibus-DP, Profibus-PA. Circulation and acyclic communication service used for finishing bei... Read more
The well-informed person reveals, the apple has already developed one and allocated NFC (the communication of near-field) IPhone primitive machine of the chip, has and already begun to test on Tuesday.
Last weekend, medias reported, the apple had already linked NFC expert Benjamin Gill (Benjamin Vigier) It is under one’s command to cause. NFC is a kind of short distance radio protocol, nearly with ” avoid touching and paying ” (contactless payment) It is a synonym. The insider thinks, the apple, this move, is being nearly announced publicly, this company plans to utilize NFC technology to establish miniaturely and pay (micropayment) The function, break traditional moving the commercial retail dot pattern.
Undoubted, the apple hopes to support to move and pay and authorize voluntarily, 100 million pieces of credit card information stored have confirmed this in a series of relevant patent and iTunes of this company.
Well-informed person show apple develop o... Read more
Summary: On the basis of the phase characteristics of the left hand material, have proposed receiving the broadband work and dividing the phaser by loading the structure in lumped capacity, inductance, then utilize this work to divide the phaser and combine the structure of feeding of the L-shaped metal bar to expand the microstrip antenna bandwidth, thus design and make operating frequency as 1. 8 GHz, the intersection of axial ratio and less than relative bandwidth of 3 dB smaller than as 40%, S11 - for 32% (1 relative bandwidth of 10 dB. 40-1. 95 GHz) Aerial design method.
Key word: Microstrip line of left hand; Power distributor; Circular polarization patch antenna of broadband
O Foreword
In recent years, with the development of modern microwave communication, the development of the broadband circular polarization microstrip antenna is paid attention to more and more by researcher, various broadband circular polarization microstrip antennas emerge in an endless s... Read more
Spread spectrum communication is an effective daily interference-free communication mode, it is a military communication main means, divided into basic fundamentals such as direct sequence spread spectrum, frequency hopping, linear frequency modulation and time hopping,etc. and made hybrid technique formed up by the basic fundamental, the design of the pseudo-code concerns the interference-free characteristic of the system in all technology. The commonly used pseudo-random sequence of the existing spread spectrum communication system has commonly used C/ A yard (thick / catching yard) in m-sequence, Gold array, Walsh array, m-sequence and satellite communications And P-code (P yard) When. In these arrays, the characteristic of P yard is outstanding, it is the longest, in 10. Under the clock rate of 23 MHz, one yard of time cycles is probably 266 days.
This text is on the basis of studying P one yard of principles, propose one cycle is longer, it is of good performance to keep ... Read more
