Difference Between CDMA and WCDMA Main Difference. GSM (Global System for mobile) and WCDMA (Wideband Code Division Multiple Access) are two types of wireless technologies or radio system.


Difference between gsm and wcdma

Posted on July 13, by Andrew Last updated on: Code Division Multiple Access CDMA and Wideband Code Division Multiple Access WCDMA are multiple access technologies used in telecommunication networks for users to access the network resources and services. Since the spectrum is a scarce resource, which is directly related to capacity, efficient use of the spectrum is a major concern in most theoretical proposals for air interface.

Other than CDMA, different multiple access methods are used around the world in radio network. Even though, these access methods are developed in different time periods, combinations of these technologies are used for efficient use of spectrum. In general, CDMA is a multiple access technology that was introduced after the TDMA and FDMA. CDMA serves the different users with separate code sequences, while there are other multiple access technologies that use time, frequency, space, and polarisation for user access separation.

When we consider the CDMA system design, multiple access and interference handling are totally different from the narrowband systems.

In CDMA, each user spread his signal over the entire bandwidth using the direct sequence spread spectrum, whereas for other users, it is shown as pseudo white noise. WCDMA was selected as the Universal Mobile Telecommunication Systems UMTS terrestrialair interface scheme for the Frequency Division Duplex FDD frequency difference between gsm and wcdma by the European Telecommunications Standards Institute ETSI in WCDMA uses 5MHz, 10MHz or 20MHz channel bandwidth to send the data signals over the air malibu casino club. WCDMA mixes original signal with a difference between gsm and wcdma random noise code, which is also known as Direct Sequence WCDMA.

Therefore, each user ends up difference between gsm and wcdma a unique code, where only users with correct code can decode the message. Therefore, without the code, jammers can only see the signal as noise. WCDMA uses the Quadrature Phase Shift Keying QPSK as the modulation scheme as per the original standard specified by the International Telecommunication Union ITU for 3G networks, which can support, kbps in the mobile environment and 2Mbps in erheblichen casino entree bei stationary environment.

WCDMA is a 3G UTRAN proposed solution, while CDMA is an casino down dover technology. WCDMA uses direct spread DS as Forward link RF channel structure, while CDMA uses DS or multicarrier. Different versions of CDMA technologies are difference between gsm and wcdma from different continents, while WCDMA was the European evolved version of CDMA technology.

Both technologies use spreading modulation as balanced QPSK in the forward link, and dual channel QPSK in the reverse link. Uniqueness of CDMA based access method is the universal frequency reuse where all the users in the same cell, and across different cells can transmit and receive on the same frequency. CDMA technology introduces core advantages, such as selective addressing capability for each user separately, message security and interference rejection.

Proper selection of difference between gsm and wcdma codes with low cross correlation leads to minimum interference between users, where we can achieve higher spectral effectiveness in CDMA based technologies. Wynn macau casino compare the CDMA evolution in different European, US, and Japanese based systems, most of them have similar principle, while differ in the chip rate, and in channel structure.

WCDMA is considered as a European evolution of CDMA technology for 3rd generation ITU specification. Access Network Tagged With: February 8, at 9: CATT Ltd VB programmers have always displayed excellent entrepreneurial difference between gsm and wcdma and along with their real hands-on programming experience.

June 25, at From this article we can get more idea about CDMA and WCDMA. October 13, difference between gsm and wcdma 9: I am looking for advise how to put more info one to best use.

I wonder if my CDMA number is convertible into WCDMA chip or a separate WCDMA chip is to be taken using number portability. Copyright © Difference Between. Terms of Use and Privacy Policy: Home Vacancies About Request Article Contact Us. Difference Between Difference Between Things, Terms and Objects. Difference Between GSM and 3G Network Technology Difference Between WCDMA and HSDPA Network Technology Difference Between 4G and Wifi Difference Between LTE and LTE Advanced Difference Between CDMA EV-DO and HSPA Network Technology.

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Teleysia - GSM Frequency Band & Management Part 1

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The basic difference between the CDMA and WCDMA is bandwidth,CDMA uses mhz frequency bandwidth while WCDMA uses 5 mhz bandwidth. Again CDMA is 2g.
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The basic difference between the CDMA and WCDMA is bandwidth,CDMA uses mhz frequency bandwidth while WCDMA uses 5 mhz bandwidth. Again CDMA is 2g.
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The most major difference between CDMA and WCDMA is in the group of technology that it is grouped with. Difference Between WCDMA and GSM;.
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Jul 13,  · Difference Between GSM and 3G Network Technology Difference Between WCDMA and HSDPA Network Technology Difference Between 4G and Wifi Difference Between.
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The basic difference between the CDMA and WCDMA is bandwidth,CDMA uses mhz frequency bandwidth while WCDMA uses 5 mhz bandwidth. Again CDMA is 2g.
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