Evaluating data transfer in hsdpawcdma nets network diagnostics dr. The mx882000c001 wcdma voice codec software option adds realtime voice encodingdecoding to the wcdma measurement software. Cdma stands for code division multiple access, which is a type of algorithm used in telecommunications to squeeze more usable channels within the same bandwidth. Third edition edited by harri holma and antti toskala both of nokia, finland. Tdcdma, tdscdma, or other 3gppapproved, air interface that uses time division duppg lexing tdd. The mx882000c001 w cdma voice codec software option adds realtime voice encodingdecoding to the w cdma measurement software. Fitzek04 february 2003lecture 2the following text is taken partially from my phd thesis.
The proposed 3g wideband cdma systems are complex in nature. Project produced the wcdma umts standard, seeking an evolutionary. What is wideband code division multiple access wcdma. The air interface is now commonly referred to as wcdma. The technicality of cdma technology has given significant advantages over other parallel technologies in terms of spectrum efficiency and overall performance. Cdma2000 success story in japan as of nov, 2003 total 3g sub. Dual pdf convert to text ocr ruim that allow for use in both gsm and cdma units. The receiver, knowing the code sequence of the user, decodes the received signal and recovers the original data.
Figure 1 a binary information signal to modulate this signal, we would multiply this sequence with a sinusoid and its. Wideband code division multiple access selected areas in. Milstein, fellow, ieee invited paper abstract to satisfy everincreasing demands for higher data rates, as well as to allow more users to simultaneously access the network, interest has peaked in what has come to be known as wideband code division multiple access wcdma. Difference between wcdma and lte compare the difference. Prerequisites and related courses participants should. W cdma wideband code division multiple access wcdma wideband code division multiple access is the radio access scheme used for third generation cellular systems that are being rolled out in various parts of the globe. Second, if the device is connected to a real network and a problem, for example a link dis connection or a slow down in throughput, arises, it is very difficult to trace the actual cause which may happen in any of the subsystems. The rake receiver consists of fingers, each corresponding to one path delay of a received signal. The most major difference between cdma and wcdma is. Fitzek universita di ferraracode division multiple accessfrank h.
In the wcdma multi evaluation application, the user needs to configure the scenario so that the combined signal path, is controlled by wcdma sig1 in order to automatically align the signal routing and analyzer settings with the signaling. Wcdma, which is an abbreviation for wideband code division multiple access or wideband cdma, is a mobile phone standard which combines cdma and gsm to create an entirely new system. Multilevel simulation of wcdma systems for thirdgeneration. Cdma is a 2g technology and is a direct competitor to gsm, which is the most widely deployed technology. Tight synchronization is required to use orthogonal codes, which then break in a multipath channel anyway quasiorthogonal codes cause selfinterference, which dominates the performance in most cdma systems nearfar problem is a serious hindrance, requiring fast and. Codedivision multiple access cdma techniques using direct sequence ds spread spectrum techniques were embodied in the is95a cellular standard and are now the clearly accepted choice for thirdgeneration cellular 3g and pcs applications. The european community has mandated a harmonized standard, gsm, in the 2g bands, and has adopted wideband cdma wcdma in the. It is effective and needs the able tool for quickly and fast programming or re. Live endtoend communication tests between a handset and w cdma mobile are supported by installing the mt8820b011 audio board. Cdma air interface proposals including wcdma in europe and japan, cdma2000 in the. The 3g systems support wide band services like high speed internet access.
When the data rates are compared, lte provides massive downlink and uplink speeds than wcdma. Browse internet while downloading a file from a corporate intranet server in the background research for these was conducted by itu and other. In europe, spirent communications in paris is a big user for wcdma including many other companies. One component of a rake receiver is a path searcher. Network diagnostics evaluating data transfer in hsdpawcdma nets. Pdf wcdma system standardization, interfaces and power control. Unlike wcdma, lte supports variable bandwidth from 1. Wideband cdma wcdma, a thirdgeneration air interface, is based on directsequence ds cdma technology. Wcdma is a wideband directsequence code division multiple access ds cdma system user information bits are spread over a wide bandwidth by multiplying user data with quasirandom bits called chips derived from cdma spreading codes. Wideband cdma radio transmission technology the university. Gsm and cdma spectrum frequencies the cdma network operates in the frequency spectrum of cdma 850 mhz and 1900 mhz while the gsm network operates in the frequency spectrum of gsm 850 mhz and 1900 mhz. Wideband code division multiple access wcdma tutorial. Commonalities between qualcomm incorporated october.
Content management system cms task management project portfolio management time tracking pdf. Engineering services group wcdma network planning and optimization 80w08531 revision b may, 2006. This relation between coverage and capacity is often referred to as the breathing effect of wcdma. Umtstdd is a mobile standard built upon the umts 3g standard, using a. A rake receiver minimizes distortion of the signals in a dscdma system. The cdma air interface is used in both 2g and 3g networks. For other wideband cdma proposals it can be written as w zeon pdf driver trial cdma. In 1985, the fcc allocated three frequency bands to spread spectrum communications. Wcdma is wideband cdma that still uses code division to divide the channels.
This tutorial provides an introduction to basic gsm concepts, specifications. Qualcomm still makes chips for wcdma, cdma, and gsm, but it is pushing for older generations for upgrades to umts universal mobile telecommunication serives wcdma. Similarly, motorola, lucent and nortel were able to leverage their. Cdma workshop is the professional powerful software service, built to task with any cdma 800, 1900, ixevdo, gsm, wcdma, lte etc smartphones, tablets, fixed terminals, data cards and more. Cdma, code division multiple access an implementation of direct sequence spread spectrum, dsss, and was used almost universally for 3g mobile communications standards as it provided an excellent format as a multiple access scheme. Wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access dscdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. Cdma vs wcdma cdma stands for code division multiple access, which is a type of algorithm used in telecommunications to squeeze more usable channels. In second and third generation wireless communication a. Student profile the audience of this course is rf engineers, technicians and network planning specialists who use planet for wcdma and hspa tasks. Multilevel simulation of wcdma systems for thirdgeneration wireless applications dr. Td cdma, tdscdma, or other 3gppapproved, air interface that uses time division duppg lexing tdd.
The fading process is generated to a file according to jakes model 57, which includes both. Giunta for the academic course of digital signal processing norman browse surgery book pdf of the third university of rome. Wideband code division multiple access wcdma is a cdma channel that is four times wider than the current channels that are typically used in 2g networks in north america. Difference between gsm and cdma the worlds renowned mobile phone network technologies are gsm global system for mobile communication and cdma code division multiple access. Wcdma for umts radio access for third generation mobile communications third edition edited by harri holma and antti toskala. Commonalities between qualcomm incorporated october 2006. Ordinary umts is implemented with wcdma wideband code division multiple access technology and frequency division duplexing fdd the term wcdma also refers to one of the itus imt2000 standards, a type of 3g cellular network. Cdma codedivision multiple access was first proposed to the cellular service in 1989, and. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher. This pioneering innovation was later standardized as is95 in july 1993 by the telecommunications industry association tia and. Fitzek04 february 2003lecture 2the following text is. All books are in clear copy here, and all files are secure so dont worry about it. Browse internet while downloading a file from a corporate. W cdma for umts principles u introduction u cdma background history ucode division multiple access cdma u why cdma.
The most major difference between cdma and wcdma is in the group of technology that it is grouped with. Cdma code division multiple access or cdma has its roots in wwii era spread spectrum technology. Commonalities between cdma2000 and wcdma technologies table of contents. Wcdma for umts principles u introduction u cdma background history ucode division multiple access cdma u why cdma. Gsm utilizes the code division multiple access cdma concept, rather velopment of a new technology wideband cdma. Live endtoend communication tests between a handset and wcdma mobile are supported by installing the mt8820b011 audio board. When we refer to cdma as a technique then wcdma is simply a particular ex.
Wcdma was specified in the 3gpp release 99 and 4 of the specification, while lte was specified in the 3gpp release 8 and 9. Cdma issues so far, cdma looks like a step backwards. No date contents related product software version 1. Cdma is the base on which access methods such as cdmaone, cdma2000, and wcdma are built. The credit for the development of the cdma standard goes to the american wireless telecommunications research and development company, qualcomm. The use of code division multiple access cdma for terrestrial cellular communications was first conceived in 1985 by dr. The bandwidth of the coded data signal is chosen to be much larger. It is one of the most important attributes when it comes to third generation mobile communication network 3g mobile phone technology. Evaluation of coexistence interference between cdma 1900 mhz. Wcdma for umts radio access for third generation mobile communications. This technology is controlled by the united states government. Wcdma is a 3g technology that is often used in tandem with gsm to provide both 2g and 3g capabilities within the same area of coverage.
Cdma can be implemented in several ways, two of which are frequency hopping and direct sequencing. Easytest easytest is a general purpose automation test tool with cross platform capability. Overview in january 1998, european telecommunications standards institute etsi decided to choose the wcdma technology to be the multiple access techniques. Wcdma is a wideband directsequence code division multiple access dscdma system user information bits are spread over a wide bandwidth by multiplying user data with quasirandom bits called chips derived from cdma spreading codes. Difference between cdma and cdma pdf semantic scholar. Yet, depending upon the market scenario they can either complement or compete against each other. Codedivision multiple access cdma techniques using direct sequence ds spread spectrum techniques. Moreover, the mt8820b can measure the audio txrx without an external audio analyzer and. Detailed interference analysis report prepared by auspi for coexistence of cdmaevdo. Wcdma wideband code division multiple access wcdma wideband code division multiple access is the radio access scheme used for third generation cellular systems that are. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth applications including streaming and. Code division multiple access cdma is a modulation and multipleaccess. The air interface is now commonly referred as wcdma.
Multiple access with free pro football playbooks pdf download of seminar report and ppt in pdf and. Cdma i about the tutorial code division multiple access cdma is a channel access method normally used by 3g radio communication technology as well as in some other technologies. Comparing with tdmafdma technologies, such as gsm, the coverage of a wcdma network cannot be. Difference between cdma and wcdma difference between. In wcdma, the coverage and capacity requirement cannot be considered independently, but should be planned at the same time with proper guidelines. Wideband code division multiple access, along with umtsfdd, utrafdd, or imt2000 cdma direct spread is an air interface standard found in 3g mobile telecommunications networks. Format indication is always transmitted in the uplink. Student profile the audience of this course is rf engineers, technicians and network planning specialists who use planet for w cdma and hspa tasks. Cdma cellular systems are deemed superior to fdma and tdma, which is why cdma plays a critical role in building efficient, robust, and secure radio communication systems. Wcdma and ltewcdma and lte synchronization aspectssynchronization aspects the 6th international telecom sync forum, itsf munich, november 2008 stefano ruffini, ericsson. Wcdma type of handover is considered for the tdcdma and the effect of its applicability is. Oct 21, 2012 wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access ds cdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. These two technologies differ in the way calls and data travel over the mobile phone networks. Code division multiple access cdma the concept of signal spreading and its uses in communications lets take a stright forward binary signal of symbol rate 2.897 343 843 350 508 627 522 991 1367 1475 814 920 1530 574 1372 411 483 1084 257 1469 539 958 738 1479 926 1170 349 1145 1375