Introduction
Code division multiple access (CDMA) is a form of multiplexing (not a modulation scheme) and a method of multiple access that does not divide up the channel by time (as in TDMA), or frequency (as in FDMA), but instead encodes data with a special code associated with each channel and uses the constructive interference properties of the special codes to perform the multiplexing. 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.
Industry Associations
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CDMA development Group - cdg.org.
The CDMA Development Group (CDG), founded in December 1993, is an international consortium of companies who have joined together to lead the adoption and evolution of 3G CDMA wireless systems around the world. click here -
Qualcomm CDMA Technology - CDMATech.com.
QUALCOMM CDMA Technologies (QCT) is the largest provider of 3G chipset and software technology in the world, with chipsets shipped to more than 50 customers and powering the majority of all 3G devices commercially available. QCT partners with nearly 60 3G network operators around the globe and has the largest CDMA engineering team in the wireless industry. click here -
Home of CDMA - Qualcomm.com.
QUALCOMM introduced Code Division Multiple Access (CDMA) technology for wireless and data products - changing the global face of wireless communications forever.Today, QUALCOMM's patent portfolio includes more than 3,900 United States patents and patent applications for CDMA and related technologies click here
CDMA Training
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CDMA Wireless Academy - CDMA-WirelessAcademy.com.
The course covers the fundamental system design concepts involved in the planning of networks based on the dominant 3G technologies, that is, CDMA2000 and WCDMA. The technology essentials, network elements, capacity dimensioning and coverage analysis of 3G CDMA networks are presented in an unified manner . . . PAID courses. click here -
Qualcomm CDMA University - CDMAUniversity.com.
At QUALCOMM University you will find the training and educational resources you need to stay on the cutting edge of 3G technology. QUALCOMM University classes are available nearly anywhere in the world.Whether you are a telecommunications expert or a novice to the wireless industry, QUALCOMM has the right CDMA class for you. click here -
CDMA Training & Seminars - CDMAOnline.com.
CDMAonline.com, a meeting and virtual working place for CDMA professionals from around the world. CDMAonline.com is designed to support and supplement the live, instructor led, seminar training provided by Space 2000 since 1987 on a worldwide basis. click here
CDMA Tutorials
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Scott Boxter & Associates CDMA Resources - Howcdmaworks.com.
Scott Baxter is a CDMA2000 network and RF performance consultant and trainer.His extensive experience has given Scott a thorough understanding of the job functions and relevant skills at every level in wireless operators, and is reflected in the focus of his courses.Everyone in their classes, or anyone requesting access, gets a username and password. If you do not have yours, just click on request username and password. They'll email it back to you usually within one working day.There is no charge to download courses for your personal use and study. click here -
CDMA Protocol Family - Protocols.com.
Protocols.com offers a comprehensive listing of data communications protocols, their functions in respect to the OSI model, the structure of the protocol and various errors and parameters click here -
CDMA Learning Resource - Rahul's CDMA Page.
This CDMA page has documents/power point slides on a wide varity of topics which interest novice and protocol engineers alike. The range of topics covered are cdma basics, spread spectrum, call processing,authentication etc. A suggested reading is: A Walk through To IS95,IS95B,CDMA2000 and Call Processing. click here -
Introduction to CDMA - Michael Hendry.
This provides an introduction to Code Division Multiple Access (CDMA) communications, covering a Radio Carrier Station (RCS) and a Fixed Subscriber Unit (FSU). This introduction to CDMA proceeds heuristically, we use very little mathematics in developing the theories, and do not assume a deep mathematical or engineering background. If you would like further information on the math and . . . click here -
W-CDMA Overview - IEC.org.
For a mobile communication system, a key parameter is the system capacity. A number of methods to increase system capacity in a W-CDMA network are discussed. This tutorial presents results from different antenna pattern parameters and sectorization techniques for optimizing the maximum number of active subscribers. click here -
IS-95, CDMA2000 and CDMA Tutorial - From Wikipedia, the free encyclopedia.
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PCS Third Generation CDMA Systems - Study of the Physical Layer - Benoit Pelletier.
The ITU has defined a set of service capabilities called IMT-2000, for International Mobile Telecommunications 2000. Many organizations have made proposals and this study will concentrate on the following three, which are using CDMA technology: UTRA (Europe), cdma2000 (North America) and ARIB (Japan). The objectives of this project are to provide a brief overview of the above proposals, with links to more detailed information. The result of this project can be used for a fast initiation in this area, with convenient links to detailed information, and to supplement lecture courses on communications. click here -
CDMA Basics - UMTSWorld.com.
This tutorial discusses the basic technology brhind CDM and compares it with other access technologies like FDM and TDM. Topics covered are access schemes, coding, codes, spreading, power control, and hand-over. click here -
CDMA System Vs TDMA System - Steve Punter.
I hope that by the time you finish reading this editorial you will have a better understanding of the true strengths and weaknesses of both technologies. click here -
CDMA Reference BlockSet - Mathworks.com.
The CDMA Reference Blockset is a collection of Simulink® blocks designed to help you develop and simulate CDMA wireless communication systems, based on the IS-95A CDMA (code division multiple access) standard. With the CDMA Reference Blockset, you can construct block diagram models of wireless systems quickly and easily using click-and-drag mouse operations. You can then run simulations on those models. You can also change parameters. The blocks in the CDMA Reference Blockset encompass the complete functionality required by the IS-95A standard. click here -
CDMA Receiver Design Specification - Tom Wada at The University of the Ryukyus.
This specification specifies the task to design CDMA (Code Division Multiple Access) Receiver, which is used for ,e.g., Cellar Phones. Since the design contest is intended for student level, the level of the task has to be completed is relatively low and they are trying to give attendees freedom in designing the task. click here -
CDMA References - Wireless Networking and Communications Group (WNCG).
An excellent page that contains lots of resources on CDMA. These resources are in the categories line CDMA tutorials, CDMA papers, and many other resources from Wireless Networking and Communications Group (WNCG) at University of Texas at Austin. click here -
Wideband CDMA systems - Updated by Kalle Ruttik.
This is the collection of lecture presentations on W-CDMA Systems course at Communications Laboratory, Tietoliikennelaboratorio.This course touches Introduction to 3G systems. Radio channel models,Evolution from GSM to UMTS, User traffic modeling for future mobile systems,Introduction to WCDMA,User traffic modeling for future mobile systems, WCDMA Physical Layer ,WCDMA Radio Interface Protocols ,WCDMA Radio Network Planning ,WCDMA Packet Access ,WCDMA Radio Resource Management , and WCDMA Physical Layer Performance . click here -
W-CDMA Principle - 3g-generation.com.
Explains how CDMA works and the principle behind CDMA. Discusses direct sequence, frequency hopping, Hybrid System: DS/(F)FH, and lastly difference between regular CDMA and W-CDMA. click here
CDMA Equipment Manufacturers
| Lucent | Nokia | Nortel Networks | RTX |
| L G | Motorola | Shensun | Audiovox |
| NEC | QUALCOMM | Samsung | Sony Ericsson |
Test Equipment Manufacturers
| CETELECOM | QUALCOMM |