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| | Code division multiple access - Wikipedia, the free encyclopedia |
 | | CDMA also refers to digital cellular telephony systems that makes use of this multiple access scheme, such as those pioneered by Qualcomm, or W-CDMA. | | | The QUALCOMM CDMA system includes highly accurate time signals (usually referenced to a GPS receiver in the cell base station), so cellphone CDMA-based clocks are an increasingly popular type of Radio clock for use in computer networks. | | | A number of different terms are used to refer to CDMA implementations. |
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http://en.wikipedia.org/wiki/CDMA
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| | CDMA: Definition and Much More From Answers.com |
| | Providing more than 10 times the capacity of the analog cellphone system (AMPS), CDMA has become widely used in North America and is also expected to become the third-generation (3G) technology for GSM. | | | A single bit example is used to take you through the Boolean math. | | | For more information, contact the CDMA Development Group (CDG) at www.cdg.org. |
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http://www.answers.com/topic/cdma
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| | USS Clueless - GSM 3G |
| | CDMA and TDMA are fundamentally incompatible and there's no way to create a new system (which they're calling WCDMA) which can support existing TDMA handsets. | | | Sprint eventually implemented a reasonable nationwide system also based on CDMA. | | | There are two other nationwide cellular systems: ATandT currently uses IS-136 TDMA, which is obsolete and has no upgrade path. |
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http://www.denbeste.nu/cd_log_entries/2002/10/GSM3G.shtml
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| | Network Computing |
| | Yes, the consensus from operators is that CDMA delivers at best an 8x-to-10x capacity improvement over analog, not the 10x-to-20x still brazenly touted by QUALCOMM. | | | With an analog subscriber base growing many times faster than the paltry rate at which subscribers are switching to digital, this looks a lot like thinly veiled face-saving. | | | Back From the Brink For a time, matters looked rather desperate as cellular operators overlaying CDMA channels on their existing analog systems got bogged down in a morass of schedule delays, technical glitches and inferior first-generation products. |
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http://www.networkcomputing.com/807/807colfrezza.html
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| | CDMA Information Page for Spread Spectrum Scene Online |
| | The CDMA Technology Site -- an introduction to this technology. | | | Handbook of CDMA System Design, Engineering and Optimization, by Kyoung Il Kim (Editor). | | | Kizito Tshilumba Kasengulu's (Berocom Inc.) -- "About The Capacity of a DS Spread Spectrum CDMA Cellular System" -- Study of System Capacity |
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http://www.sss-mag.com/cdma.html
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| | CDMA FAQ: Glossary |
| | Bit within the context of CDMA is distinct from chip and refers to a payload binary digit. | | | The relevant signal will be encoded with a known | | | Long code in CDMA is a chip sequence which is 2 |
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http://home.san.rr.com/denbeste/glossary.html
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| | What is CDMA Cell Phone Technology |
| | A perfect analogy of CDMA wide-band technology and narrow-band analog would be the Internet. | | | Produced by Interdigital Communications (IDCC), IDCC has developed intellectual property for both hardware and software products for the wide-band code division multiple access (WCDMA) air-interface protocols of the third-generation (3G) standards. | | | Picture CDMA technology as a Cable or DSL Line, and analog technology as a dial-up Internet connection. |
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http://www.cellphonecarriers.com/cdma-wireless-phone.html
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| | What is CDMA? - A Word Definition From the Webopedia Computer Dictionary |
| | Because Qualcomm created communications chips for CDMA technology, it was privy to the classified information. | | | Technical overview of CDMA and how it differs from TDMA-based systems. | | | Page Computer 343.40711622 KYOKX2VZCE Kyocera PHONE - KYOCERA KX2 TRIMODE CAMERA CDMA, COLOR DISPLAY, VIDEO, AND SPEAKERPHONE W/ MANUFACT. |
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http://www.webopedia.com/TERM/C/CDMA.html
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| | CDMA Online: CDMA Interactive |
| | - CDMA Glossary & Examples - Our A to Z Glossary offers definitions of many CDMA terms and includes Applications and Examples. | | | Choose a Floor below to begin exploring information on CDMA concepts, IS-95 topics, Cellular and PCS Networks and more. | | | - Interactive Workshop - Presentations featuring various CDMA concepts and IS-95 topics presented in an easy to use Interactive online format. |
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http://www.cdmaonline.com/interactive/index.html
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| | CDMA Resource Center |
| | CDMA is a "spread spectrum" technology, allowing many users to occupy the same time and frequency allocations in a given band/space. | | | In a world of finite spectrum resources, CDMA enables many more people to share the airwaves at the same time than do alternative technologies. | | | CDMA Technology CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built. |
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http://www.palowireless.com/3g/cdma.asp
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| | Spread Spectrum & CDMA Tutorial, Theory, Circuit Diagrams, Tools, OEM Products, Consultants, and More |
| | The article is so easy to read, yet so comprehensive, that we have included it in both the Primers and Advance Topics sections of our Spread Spectrum Resources directory. | | | You might consider doing a search for the title at Google.com to see if it has re-posted somewhere on the Web. | | | The site uses frames, which allows for fast and easy navigation through a well organized table of contents. |
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http://www.newwaveinstruments.com/resources
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| | Cdma Rf System Engineering (Artech House Mobile Communications Library) |
| | This book is particularly best reference for research students working in the area of CDMA systems design or algorithm development. | | | Good discussion of fading channels, overview of the major wireless protocols that were in use at the time the book was written, and well thought... | | | IS-95 CDMA and cdma 2000: Cellular/PCS Systems Implementation |
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http://www.freeglossary.com/p:0890069913
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| | CDMA Technology |
| | CDMA, for Code Division Multiple Access, is different than those traditional ways in that it does not allocate frequency or time in user slots but gives the right to use both to all users simultaneously. | | | Walsh-Hadamard codes do not have the best spreading behavior. | | | Each user is assigned one or many orthogonal waveform derived from an orthogonal code. |
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http://www.tsp.ece.mcgill.ca/Telecom/Docs/cdma.html
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| | What is IS-95: CDMA? |
| | For more information on CDMA, visit the CDMA Development Group. | | | Covers mobile radio propagation considerations, basic cellular systems engineering, Walsh functions and CRC codes, pseudonoise sequences, diversity techniques and rake processing, CDMA cellular system design, and CDMA optimization issues. | | | IS-95 CDMA and cdma 2000: Cellular/PCS Systems Implementation |
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http://www.tech-faq.com/cdma-is-95.shtml
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| | CNP: CDMA Digital Cellular and PCS |
| | In the TIA-95 implementation of CDMA, the bandwidth of a single channel is 1.25 MHz, which is claimed to support 10 to 20 times as many users as the equivalent spectrum dedicated to analog cellular. | | | CDMA digital systems get their name, Code Division Multiple Access, by assigning a unique code to each user and by spreading the transmission of all users in parallel across a wide band of frequencies. | | | The TIA-95 CDMA digital cellular standard is described, from a network perspective, in the February, 1996 and March, 1996 issues of Cellular Networking Perspectives. |
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http://www.cnp-wireless.com/cdma.html
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| | CDMA Online |
| | Our Distance Learning Center has 56 Q & A on CDMA Optimization. | | | Click on a Seminar below to see a brief overview or visit our Seminars Department for more detailed information. | | | See our A - Z CDMA Glossary with Examples and Applications. |
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http://www.cdmaonline.com
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| | CDMA Tutorial |
| | The rate of a spreading code is referred to as chip rate rather than bit rate. | | | One of the main advantages of CDMA systems is the capability of using signals that arrive in the receivers with different time delays. | | | CDMA uses unique spreading codes to spread the baseband data before transmission. |
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http://www.umtsworld.com/technology/cdmabasics.htm
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| | Nokia - Mainpage |
| | The Nokia 6030 has all the essential features in a comfortable and reliable design. | | | Blending the latest technology with useful business features. | | | The Nokia 3155 CDMA phone gives you the latest technology to tap into for work and entertainment. |
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http://www.nokia-asia.com
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| | Nortel: Solution: CDMA Networks: Overview |
| | CDMA OAM&P Solutions are designed to help operators manage and maintain their networks as effectively as possible to ensure efficient and cost-saving operations. | | | On the cutting edge of technology, Nortel's market-leading 1xEVDO offering is expanding the depth and reach of wireless access. | | | Nortel's CDMA Access Network solution is based on the strength of the Metro Cell family of base transceiver stations (BTS) and the base station controller (BSC). |
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http://www.nortelnetworks.com/solutions/cdma
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| | *** This thesis has moved; Please update your bookmarks *** |
| | The home page for the dissertation "Packet Data Communications Over Coded CDMA with Hybrid Type-II ARQ" authored by Seokhyun Yoon has been moved to http://www.library.njit.edu/etd/2000s/2003/njit-etd2003-030/njit-etd2003-030.html. | | | You will automatically be redirected to the new page in 10 seconds. |
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http://www.library.njit.edu/etd/njit-etd2003-030/njit-etd2003-030.html
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| | Freelance Propaganda: Clarifying CDMA vs GSM |
| | It does use “CDMA the technology”, but it certainly isn’t related in any way, shape, or form to IS-95. | | | CDMA the technology is rather better and is being used in a number of newer systems. | | | CDMA is both a mobile phone standard (IS-95) and a technology (Code Division Multiple Access) and if youand#8217;re comparing and#8220;GSMand#8221; to and#8220;TDMAand#8221; to and#8220;CDMAand#8221; then youand#8217;re refering to phone standards. |
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http://www.freelancepropaganda.com/archives/000298.html
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| | Defcon Forums - Rumors of a CDMA OKI-900 |
| | That's the phrase that sticks in my mind in relation to how they were being described, so this may be where the question you're asking springs from. | | | This may also be where the CDMA Oki 900 thing is originating from. | | | There are also many issues to overcome with doing (essentially) scanning under IS-95 CDMA, both radio- and software-related - notably, that IS-95 uses FHSS which would require an FHSS synthesiser capable of locking to another phone's seeded hopping pattern; also the generation of A-Keys capable of decrypting the intercepted signal was another issue. |
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http://forum.defcon.org/printthread.php?t=4341
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| | GSM World - 3GSM Platform |
| | Some of the most prestigious minds seeking to anticipate the immediate future, with a horizon of 3-6 years, detecting social trends, economic trends and technological currents on the takeoff runway, analysing their potential implication in various contexts and determining the conclusions that should be disseminated to the strategic points of society. | | | In recent years a growing body of expert analysis has concluded, doubtless correctly, that compelling applications and attractive content services will be key to the commercial success of 3GSM... | | | Presumably W-CDMA is a member of the CDMA family? |
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http://www.gsmworld.com/technology/3g/index.shtml
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| | WCDMA: research |
| | Applicability of the currently proposed IS-95 CDMA system to support future wideband multimedia services: Simulation and/or analysis will be performed to evaluate the system performance in terms of delay-throughput, packet loss, and capacity utilization. | | | This proposed 3-year research project will deal with the application of wideband multimedia services include voice, data (mainly for internet applications), and possibly low-rate video. | | | Development of suitable CDMA techniques for wideband cellular communications: As a result of the studies on the above mentioned issue, we will propose a better scheme. |
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http://www.ece.concordia.ca/Research/wcdma/project.html
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| | CDMA University |
| | This unit is staffed by engineering experts who work in the field optimizing 3G network rollouts, when they are not teaching. | | | QUALCOMM’s CDMA University educates 3G wireless carriers and infrastructure manufacturers in the design, deployment and optimization of CDMA networks. | | | Whether you are a telecommunications expert or a novice to the wireless industry, QUALCOMM has the right CDMA class for you. |
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http://www.cdmauniversity.com
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| | Technorati Tag: cdma |
| | "3G CDMA technologies have added more than 50 million new users so far in 2005, and now serve 214 million people across six continents," said Perry... | | | In India’s great telecom sweepstakes game, the trendsetter was C Sivasankaran, the first to milk his equity by selling out to Essar in Sterling... | | | Gemplus has been selected by TELUS Mobility to develop R-UIM cards that will tie together the Canadian wireless carrier’s CDMA and iDEN networks and... |
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http://www.technorati.com/tag/cdma
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| | CDMA Online |
| | The latest thinking in all aspects of the commercial development process, from strategy to research to production to sales and marketing | | | Click here for a list of CDMA Educational Foundation Events, including their Basic Market Research Course. |
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http://www.cdmaonline.org/home.html
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| | Training at CDMA-Wireless Academy |
| | In addition, we offer Consulting Services that specialize in design, analysis, optimization, and training in radio broadcast and point-to-point communication systems. | | | Our lead instructors hold PhDs in electrical engineering, and have advanced experience in CDMA as well as wireless communications technology. | | | Contact us to further discuss how to make your product or technology more successful. |
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http://www.cdma-wirelessacademy.com
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| | CDMA |
| | Say hello to a phone that lives up to its name. | | | The 1.2 megapixel camera phone also features a built-in flash and 5X digital zoom to expand picture-taking options, MPEG-4 video record and playback, and 16 megabytes of onboard memory for storing high- and low-resolution images, up to 200 photo caller ID entries, multimedia files and downloaded games. | | | The Kyocera Koi's unique "swivel" form factor makes it stand out in a crowd and offers easy one-button operation of the camera, which can be used with the phone swiveled open or closed. |
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http://www.kk-dwi.com/cdma.htm
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| | e-clips: CDMA |
| | This three-day international conference will serve an audience of decision makers who are interested in learning about and contributing to the latest commercial advancements and anticipated future developments related to advanced power management and efficient energy utilization. | | | e-clips has found new items on ' CDMA ': | | | To browse all sites for 'CDMA,' click here. |
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http://www.eg3.com/eclips/html/2005-03-21/mobile_cdma_blank.html
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| | Lucent - Mobility Solutions - CDMA2000 Solutions for Service Providers |
| | Benefit from flexible and scalable core network solutions, designed with the all-IP future in mind. | | | With our unmatched expertise in complex CDMA network deployment, we can help you rapidly introduce profitable new services and maximize your network value. | | | Lucent Technologies Announces Contracts With China Unicom Totaling $107 Million for CDMA Expansion Projects More |
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http://www.lucent.com/solutions/cdma.html
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| | MobilMania.cz - CDMA: sedm dní poté |
| | 04.08.2004 11:26 CDMA bude pořád rychlejší než obyčejný připojení. | | | Při uvádění CDMA modemu do provozu se mnozí uživatelé potýkali s řadou problémů s modemy. | | | Během prvního týdne spuštění Eurotel Data Expres vyšla na MobilManii analýza nové služby a také test a zkušenosti s používáním CDMA modemu. |
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http://www.mobilmania.cz/Operatori/AR.asp?ARI=107887
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| | Qualcomm invests in CDMA start-ups |
| | "Qualcomm has been working to expand its presence in Greater China by simultaneously working in partnership with the Chinese government, China Unicom, CDMA manufacturers, BREW and gpsOne application developers, and other businesses." | | | We expect to see a rapid increase in the number of new CDMA-related companies in China as third-generation CDMA technology is deployed worldwide." | | | Chinese companies receiving investments from Qualcomm will benefit from access to Qualcomm's products and technologies, as well as business and strategic relationships throughout the industry. |
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http://www.cellular-news.com/story/8991_print.shtml
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| | CDMA definition (Phone Scoop) |
| | CDMA systems have been in commercial operation since 1995. | | | IS-95 CDMA systems are sometimes referred to as cdmaOne. | | | But the term "CDMA" is also commonly used to refer to one specific implementation: IS-95 - a mobile-phone technology that competes with technologies such as GSM. |
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http://www.phonescoop.com/glossary/term.php?gid=8
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| | CDMA - Glossary - CNET.com |
| | CDMA digitizes the conversation and tags it with a special frequency code. | | | CDMA is a digital spread-spectrum modulation technique used mainly with personal communications devices such as mobile phones. | | | The receiving device is instructed to decipher only the data corresponding to a particular code to reconstruct the signal. |
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http://www.cnet.com/Resources/Info/Glossary/Terms/cdma.html
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| | CDMA Glossary |
| | Second-generation cellular systems are based on digital communications technology. | | | of a CDMA system is affected by many factors. | | | Multiple-access techniques aim to share a channel between two or more signals in such a way that each signal can be received without interference from another. |
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http://www.argospress.com/Resources/cdma-mobile
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| | broadband » Canadian Wireless FAQ 7. CDMA |
| | CDMA works by converting speech into digital information, which is then transmitted as a radio signal over a wireless network. | | | Code Division Multiple Access (CDMA) is a digital wireless technology that was pioneered and commercially developed by Qualcomm. | | | Using a unique code to distinguish each different call, CDMA enables many more people to share the airwaves at the same time - without static, cross-talk or interference. |
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http://www.broadbandreports.com/faq/7400
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| | CDMA Home Page |
| | CDMA, on the other hand, uses a technique known as soft handoff to eliminate this problem. | | | The maximum number of CDMA subscribers is relative to the system environment, application, and the trade off in terms of coverage and quality. | | | The coverage generated by CDMA technology is better than that of AMPS or TDMA (by 3-6 dB). |
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http://www.gemplus.com/techno/cdma
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| | USS Clueless CDMA FAQ -- How is CDMA superior to TDMA? |
| | CDMA systems constantly adjust power to make sure as little is used as necessary, and compensate for this by using coding gain through the use of forward error correction and other approaches which are much too complicated to go into here. | | | GSM is based on TDMA, but the next generation will use a CDMA air interface. | | | CDMA is more efficient about that kind of thing. |
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http://denbeste.nu/cdmafaq/cdmatdma.shtml
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| | CDMA Explained |
| | Wideband CDMA that forms the basis of UMTS 3G networks, Developed originally by Qualcomm, CDMA is characterized by high capacity and small cell radius, employing spread-spectrum technology and a special coding scheme. | | | Developed originally by Qualcomm and enhanced by Ericsson, CDMA is characterized by high capacity and small cell radius, employing spread-spectrum technology and a special coding scheme. | | | There are now different variations, but the original CDMA is now known as |
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http://www.cellular.co.za/cdma.htm
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| | Contents |
| | CDMA with Optical Amplifier and PIN at the receiver | | | Effect of the code length F on the Bit-Error Rate (Sync Chip Pulse). |
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http://www.co.it.pt/%7Eslug/research/optical_CDMA/final_report/node1.html
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