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| | Code division multiple access - Wikipedia, the free encyclopedia |
 | | CDMA also refers to digital cellular telephony systems that make use of this multiple access scheme, such as those pioneered by Qualcomm, or W-CDMA. | | | Synchronous CDMA, or Code Division Multiplexing (CDM) exploits at its core mathematical properties of orthogonality. | | | In a bursty traffic environment like mobile telephony, the advantage afforded by CDMA is that the performance (bit error rate) is allowed to fluctuate randomly, with an average value determined by the number of users times the percentage of utilization. |
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http://en.wikipedia.org/wiki/Code_division_multiple_access
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| | Lighting the Local Area: Optical Code-Division Multiple Access and Quality of Service Provisioning |
| | The design of an advanced code generation algorithm is a possible direction for future research to allow provision of QoS in optical CDMA LANs at the physical layer. | | | An advanced code generation algorithm is needed, one that differs from the common algebraic coding techniques. | | | Bipolar codes can be constructed such that the signals add to zero, leading to lower cross-correlation values and hence a larger number of available address codes; this cancellation is not possible in positive systems. |
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http://www.comsoc.org/~ni/private/2000/nov/stok.html
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| | Code Division Multiple Access (CDMA)(Prasanth Bollepally) |
| | CDMA phones use a hard handoff when moving from a CDMA system to an analog system because soft handoffs are not possible in analog systems. | | | The words "code" and "division" are important parts of how CDMA works. | | | CDMA uses two important types of codes to channelize users. |
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http://web.indstate.edu/ect/fall02/PrashanthBollepally.htm
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| | Code Division Multiple Access |
| | CDMA also has better potential for data movement, and this is obviously a big plus as we move into an era of wireless e-mail, internet, and other data transfer needs. | | | This allows CDMA to operate with 4 to 6 times more capacity than digital TDMA or FDMA. | | | When analog FM/FDMA is considered, CDMA outperforms by a factor of almost 20. |
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http://oak.cats.ohiou.edu/~mh865/rdraft.htm
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| | CDG : Technology : What is CDMA (Code Division Multiple Access)? |
| | A multiple access method is a definition of how the radio spectrum is divided into channels and how channels are allocated to the many users of the system. | | | CDMA cell coverage is dependent upon the way the system is designed. | | | In other words, a large number of users share a common pool of radio channels and any user can gain access to any channel (each user is not always assigned to the same channel). |
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http://www.cdg.org/technology/cdma_technology/about_cdma.asp
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| | MULTICARRIER MODULATION CODE DIVISION MULTIPLE ACCESS |
| | CDMA has numerous inherent advantages that are derived from the spectral spreading. | | | In an effort to combat the afore-mentioned problem, concatenating a cyclic prefix (with length equal that of the channel) to the input into the channel makes the input appear periodic to the channel. | | | In this report, a brief overview of CDMA and Multicarrier modulation will be presented in section 2 while various MC-CDMA system architectures will be described in section 3. |
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http://www.stanford.edu/~lawoniyi/mcm7.htm
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| | Wiley::Theory of Code Division Multiple Access Communication |
| | Complete with useful appendices providing analyses of the moments of CDMA system decision statistics, Theory of Code Division Multiple Access Communication is a ready reference for every engineer seeking an understanding of the history and concepts of this key communications technology. | | | Theory of Code Division Multiple Access Communication provides a lucid introduction and overview of CDMA concepts and methods for both the professional and the advanced student. | | | CDMA2000 Evolution: System Concepts and Design Principles (Hardcover) |
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http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471457124.html
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| | CDMA (Code Division Multiple Access) |
| | i want to know about cdma technology and i think this site is the best resource to gain it. | | | Read an executive summary and register to download the full IBM paper. | | | Advantages of CDMA technology include high user capacity and immunity from interference by other signals. |
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http://www.networkworld.com/details/464.html?def
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| | Multiple access - Wikipedia, the free encyclopedia |
| | In computer networking, a scheme that allows temporary access to the network by individual users, on a demand basis, for the purpose of transmitting information. | | | In telecommunication, the term multiple access has the following meanings: | | | The connection of a user to two or more switching centers by separate access lines using a single message routing indicator or telephone number. |
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http://en.wikipedia.org/wiki/Multiple_access
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| | CDMA (Code Division Multiple Access) (Linktionary term) |
| | CDMA was originally developed by Qualcomm, although the underlying technology has been around since the 1940. | | | CDMA is an access technology and air interface for wireless digital cellular systems and other communication systems. | | | CDMA uses wideband spread spectrum techniques for signal transmission, as opposed to narrowband channel techniques used in conventional analog systems. |
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http://www.linktionary.com/c/cdma.html
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| | OhioLINK ETD: YUE, XIAODONG |
| | Computational complexity of the proposed methods is derived and compared. | | | Therefore, CDMA systems suffer from cochannel interference, which results in the near-far problem and constitutes a major impediment to the overall system performance. | | | Both CDMA with receiver antenna array and space-time coded CDMA (ST-coded CDMA) are investigated. |
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http://rave.ohiolink.edu/etdc/view?acc_num=ucin1083253130
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| | Find in a Library: Code division multiple access communications |
| | WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries. | | | Find in a Library: Code division multiple access communications | | | To find this item in a library, enter a postal code, state, province, or country in the field above. |
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http://worldcatlibraries.org/wcpa/ow/b258a8083cf18697a19afeb4da09e526.html
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| | CDMA definition (Phone Scoop) |
| | CDMA (IS-95) systems have been in commercial operation since 1995. | | | IS-95 CDMA systems are sometimes referred to as cdmaOne. | | | It is a general type of technology, implemented in many specific technologies. |
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http://www.phonescoop.com/glossary/term.php?gid=8
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| | Edinburgh Research Archive : Item 1842/295 |
| | The two classes of codes used in this system, namely spreading codes and forward error correction codes (including Turbo codes), are discussed. | | | The principles of the spread spectrum concept and DS-CDMA technology are first outlined, including a description of the system model and the conventional receiver. | | | Near maximum likelihood multiuser receivers for direct sequence code division multiple access |
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http://hdl.handle.net/1842/295
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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. | | | Code Division Multiple Access, a cellular technology orginally known as IS-95, competes with GSM technology for dominance in the cellular world. |
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http://www.cellular.co.za/cdma.htm
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| | Definition: code-division multiple access |
| | code-division multiple access (CDMA): A coding scheme, used as a modulation technique, in which multiple channels are independently coded for transmission over a single wideband channel. | | | On reception, each carrier can be distinguished from the others by means of a specific modulation code, thereby allowing for the reception of signals that were originally overlapping in frequency and time. | | | Thus, several transmissions can occur simultaneously within the same bandwidth, with the mutual interference reduced by the degree of orthogonality of the unique codes used in each transmission. |
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http://www.its.bldrdoc.gov/fs-1037/dir-007/_1033.htm
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| | IEC: Wideband Code Division Multiple Access (W–CDMA) |
| | Wideband code division multiple access (W—CDMA) is a CDMA channel that is four times wider than the current channels that are typically used in 2G networks in North America. | | | In January 1998, European Telecommunications Standards Institute (ETSI) decided to choose the W—CDMA technology to be the multiple access techniques for the third-generation mobile telephone system. | | | Consider these and other benefits of our FREE registration, or register by clicking here. |
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http://www.iec.org/online/tutorials/wcdma
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| | Code Division Multiple Access |
| | -communication channels are separated by pseudo-random modulation coding | | | -realization that "…optimal multiple access communication requires that all user stations (mobiles) regulate their transmitter powers to the lowest that will achieve adequate signal quality." ( | | | Spread Spectrum CDMA Systems for Wireless Communications. Artech House, Inc. Boston. |
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http://oak.cats.ohiou.edu/~mh865/cdma.htm
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| | WCDMA - Wideband Code Division Multiple Access |
| | Broadband data performance of third-generation mobile systems (Ericsson Review 2005/1) | | | The steps required for WCDMA Evolved can be taken as incremental investments to existing WCDMA network assets. | | | Basic concepts of WCDMA Radio Access Networks (White Paper) |
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http://www.ericsson.com/technology/tech_articles/WCDMA.shtml
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| | Technorati Tag: code division multiple access |
| | To contribute to this page, just post to your blog and include this code. | | | This page shows blog posts, photos, and links that have been tagged code division multiple... | | | To contribute to this page, just post to your blog and include this code: |
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http://www.technorati.com/tag/code+division+multiple+access
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| | Code-Division Multiple Access on Flickr - Photo Sharing! |
| | To take full advantage of Flickr, you should use a JavaScript-enabled browser and | | | Sign up for a free account, or sign in (if you're already a member). | | | Code-Division Multiple Access on Flickr - Photo Sharing! |
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http://www.flickr.com/photos/jonathanstone/20890465
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