These two technologies differ in the way calls and data travel over the mobile phone networks take place. Most of us geekier folks instantly know if our iphones are cdma or gsm models, but not everyone pays as much attention to the largely insignificant technical details of their phones. The cellular mobile service is being used everywhere in the world today. Gsm networks are available in more than 200 countries worldwide, which makes the gsm a more popular technology as compared to cdma. Global system for mobile has ruled in the market of western europe. Ijcat international journal of computing and technology, volume 1, issue 8, september 2014. The main tdoa location technologies considered for gsm and cdma are e otd. The gsm network operates in the frequency spectrum of 850mhz and 1900mhz. The original cell phone technology, global systems for mobile communication gsm, has met its rival in code division multiple access cdma. Difference between cdma and gsm gsm and cdma are two dominant technologies for mobile communication.
Gsm, on the other part of the world was developed due to lack of reach of cdma to reach the european countries. Tdma divides each cellular channel into three time slots in order to increase the amount of data that can be carried. Cdma has faster data rate as compared to gsm as evdo data transfer technology is used in cdma which offers a maximum download speed of 2 mbps. If you want to check out what other phones work on which technology, you can use our phone compatibility tool below. In february 1987 europe produced the very first agreed gsm technical specification. Difference between umts and wcdma network technology. Ran technical specification group and its working group 4 radio performance and protocol aspects. This page compares cdma vs gsm describes difference between cdma and gsm technical specifications. Furthermore, for any help on gsm and cdma technology based projects or doubts regarding this article, you can contact us by commenting.
In terms of efficient use of the spectrum, cdma is better than gsm, which uses fdmatdma, as the former can handle more subscribers per bandwidth allocation. Gsm and cdma both serve as shorthand for different mobile phone. The difference between gsm and cdma can be considered in terms of technology they use, the security factors, and the data transfer speeds, and so on. The newer ipad air, ipad mini and some fourth generation. The most common older phones that work on both technologies include the iphone 6 series and samsung galaxy s6 series. On the other hand, in cdma the network identifies a handset by the information stored in the internal memory and hence, its handset specific. Difference between cdma and cdma pdf semantic scholar. Comparison between cdma and tdma air interface for. Gsm technology global system for mobile communication or groupe special mobile to standardize cellular communication thoughout europe. How to tell if an ipad is gsm or cdma your business. Gsm and cdma are different technologies that phones use to connect. The key difference between gsm and cdma is the multiple access method they use. Whereas, cdma stands for code division multiple access, is a technology that refers to the network type.
Gsm and cdma are the two wireless protocols used to facilitate cell phone service. This article is all about the difference between gsm and cdma technology. Cdma code division multiple access is a technology that forms the basis of 3g mobile phones. 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. Gsm, you need to be aware that the gsm technology enables transmission of voice and data in the same time while the cdma technology cannot do that. Gsm global system for mobile communication offers moderate security. The technical differences are considerable, even if they. Overview of 2g lcs technnologies and standards ftp. Gsm supports transmitting data and voice both at once, but cdma have not this feature. Cdma is very useful as well as interesting from a buyers perspective. Global vs ltecdma vs lte, gsm or umts windows central. On the other hand, cdma is considered as the most secure telephonic network. All radio access technologies have to solve the same problems.
Difference between gsm and cdma with comparison chart. Gsm global system for mobile communication and cdma code division multiple access are two dominant technologies for mobile communication. The fundamental differences between these four modern technologies is the way they transmit and receive information. Both the gsm and cdma are cellular wireless technologies. The basic difference between gsm and cdma is that the gsm is a sim specific i. Gsm global system for mobile communication is a 2g technology.
On comparing both the technologies gsm has some limitation when the call quality is concerned but still has. Gsm cdma and gsm are both multiple access technologies. The gsm networks modernized with gprs and edge are also described as networks of generation 2. When we compare both technologies, the gsm technology has some limitations as far as the quality is concerned. Evdo ready mobile phones are required to use this technology. Lte long term evolution is a 4g communication standard designed to be 10x faster than standard 3g. For browsing the web, to watch videos and to download music, cdma is better choice as compared to gsm. The entire information about the user and the account is stored in the internal memory of the device or handset. Theyre ways for people to cram multiple phone calls or internet connections into one radio channel. Comparison of cdma and gsm mobile technology article pdf available in middle east journal of scientific research 12. Effect of mobile phone radiation on brain activity gsm vs cdma aruna tyagi1,manoj duhan1 and dinesh bhatia2 1department of electronics and communication engineering 2department of biomedical engineering deenbandhu chhotu ram university of science and technology, murthal, sonepat, haryana1039.
The global system for mobile communications gsm is a standard developed by the. Cdma phones what is the difference between gsm and cdma tracfones. However, the one chief difference between the two standards involves the way the data is transformed through the radio waves a smartphone receives and broadcasts. In 3g, the most prevalent technology was umts with cdma 2000 in close contention. There are many frequency ranges for gsm global system for mobile communication however 2g is the most used frequency. Cdma is one of the types of mobile connections for making calls where as gprs is a technology for internet connections through a mobile phone. But what are gsm and cdma, and how do they affect your phone, service, and coverage. Less radiation exposure from cdma phones compared with gsm the council of europes recent resolution below on the need to reduce exposures to electromagnetic fields focused on cell phones with continuous pulse waves, the kind emitted by gsm phones e. Gsm stands for global system for mobile communications, a radio system used in mobile devices.
Devices like mobile phones built for one standard of communication cannot operate on the other. It allows for encryption between the end user and the service base station. Just like cdma, gsm is a developed and innovated form of technology that is originally known as the time division multiple access or tdma. Gsm standard still evolving and improved with new features and services. It also mentions tutorial links on gsm and cdma useful to derive further difference between gsm and cdma. Whereas only mobile phones from a set of whitelisted companies can be used with a cdma network. However, there are some older phones that will work across both gsm and cdma networks. The main distinction between gsm and cdma is that in gsm, the customer information is put on a sim card which can be moved to a new mobile phone.
Basics idea about cdma technology and its applications. Theyre ways for people to cram multiple phone calls or internet. Prior to its development a number of incompatible systems served europe. In terms of data rates possible, cdma having a a bandwidth of 1. Gsm is considered the worldwide standard for cellular telephone communication. The key difference between the two is that gsm is a standard and cdma is a technology, but gsm, over the years has come close to attaining technological status. In 2000, gsm become very popular technology worldwide.
Gsm uses edge data transfer technology that has a maximum download speed of 384 kbps which is slower as compared to cdma. Gsm technology was developed by europe in1982 but its massive deployment started in 1992. Prepaid gsm sim cards were launched in 1996 and worldwide gsm subscribers passed 100 million in 1998. Global system for mobile communication gsm definition global system for mobile communication gsm is a globally accepted standard for digital cellular communication. Tdma allocates each user a different time slot on a given frequency. Signals can be detected as the gsm signals are concentrated in the narrow bandwidth. Determining whether an ipad supports gsm or cdma is an important step when purchasing one of the tablets or selecting a carrier. Home others difference between umts and wcdma network technology. Not to worry, its extremely easy to find out if an iphone is gsm or cdma, all you need to. Some mobile carriers support only gsm network standards, while others use cdma standards.
Cdma and gsm are both multiple access technologies. In this video i will go to show you difference between gsm and cdma technology. Cdma mobile networks, gsm stands for global system for mobile communication, and cdma stands for code division multiple access. Both gsm and cdma standards get multiple access, meaning that a large number of calls can go through a single cell phone tower. Rates for global evolution edge cdma, are 3g gsm based standards. Global system for mobile communications gsm, around 8085% market share and is95 around 1015% market share were the two most prevalent 2g mobile communication technologies in 2007. Gsm is the name of a standardization group established in 1982 to create a common european mobile telephone standard. Gsm is a very straightforward standard, whereas cdma is somewhat complicated. Gsm vs cdma difference between cdma and gsm youtube.
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