The fourth generation 4g technology is the fastest technology provide for data transfer. Code division multiple access cdma linkedin slideshare. This document is highly rated by computer science engineering cse students and has been viewed 2143 times. The new applied science furnishes the highspeed, wireless systems and wide coverage of the area. Gsm technology was developed by europe in1982 but its massive deployment started in 1992. Wimax has the bandwidth efficiency of less than or equal to 5bpshz and wifi has the bandwidth efficiency of less than or equal to 0. May 05, 2010 code division multiple access introduction cont. In second and third generation wireless communication a protocol named cdma came into existence. This technology makes optimal use of available bandwidth and is based on spread spectrum technology.
But now a days both techologies are very popular through out of the world. Mar 08, 2015 mobile phone cloning seminar and ppt with pdf report. Cdma technology seminar ppt way2project in free download as powerpoint presentation. The great attraction of cdma technology has been because of the extraordinary increase in the. Cdma session 8 nilesh jha is95 cdma digital cellular cdma same frequency allocations as tdma but different bandwidths per signal, so grouped differently started. 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. A mobile device also known as a handhelddevice, handheld computer or simply handheld is asmall, handheld computing device, typically having adisplay screen with touch input andor a. Download 3g ppt presentation slides and seminar report in pdf for free for cse students. The gsm operates on the wedge spectrum called a carrier. Cdma technology code division multiple access channel.
Codedivision multiple access cdma is a channel access method used by various radio communication technologies. Cdma technology seminar ppt way2project in code division. It is still a research lab standard, the stage of broadband mobile communications that will replace the third generation 3g. Cdma is able to produce a reasonable call with lower signal cell phone reception levels.
Generate a local pseudorandom code with a higher rate than the data to. This allows several users to share a band of frequencies see bandwidth. Multiple users occupying the same band by having different codes is known as cdma code division multiple access system let w spread bandwidth in hz r 1tb date rate s received power of the desired signal in w j received power for undesired signals like multiple access users, multipath. Computer programming concepts and visual basic ebook free download pdf. Introduction to cdma code division multiple access cdma is a radically new concept in wireless communications.
Authentication allows the mobile service provider network to determine the legitimacy of a mobile phone. The template design has the image of an iphone 11 surrounded by colorful background. Cdma 3g mobile devices and services will transform wireless communications into online, realtime connectivity. It is still a research lab standard, the stage of broadband mobile communications that will. Ppt cdma technology powerpoint presentation free to. From here the concept of wimax technology started and wimax is the wireless interoperability for. Nov 30, 2012 cdma technology ppt paper presentation video gives over view on how it woks advantages an disadvantages of cdma technology.
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. Chapter cdma code division multiple access, ppt, semester. The technicality of cdma technology has given significant advantages over other parallel technologies in terms of spectrum efficiency and overall performance. Cdma technology is known as a spreadspectrum technique which allows many users to occupy the same time and frequency allocations in a given band and space. Cdma, which stands for code division multiple access, is a competing cell phone service technology to gsm, the worlds most widely used cell phone standard. Free modern technology powerpoint template slidemodel. The uploader spent hisher valuable time to create this 4g technology powerpoint presentation slides, to share hisher useful content with the world. Scribd is the worlds largest social reading and publishing site. Sniffing the cellular network, trashing cellular companies or cellular resellers, hacking cellular companies or cellular resellers. It allows each user to transfer over the entire frequency spectrum all the time. Free iphone powerpoint template is the latest design for the technical presentations on information technology, communication, and iphone utilization. The system is also loaded with gsmcdma protocol standards further modified on the canbus standard t give uninterrupted information. It says that cdma technology makes existing mobile handset more efficient and attractive.
Ppt cdma technology overview powerpoint presentation. The ancient systems of internet admittance are doing a better job but coming to the speed and access area of those systems then it does not have any solution. Cdma is a new technology in wireless communication. Tdma technology was more popular in europe, japan and asian countries, where as cdma is widely used in north and south america. The technology is commonly used in ultrahighfrequency uhf cellular telephone systems, bands ranging between the 800mhz and 1. Youve probably heard of these acronyms when you were told that you cant use a certain phone on your mobile network because theyre using different technologies that are not compatible. In 2000, gsm become very popular technology worldwide. Cdma technology ppt paper presentation video gives over view on how it woks advantages an disadvantages of cdma technology. Cdma books this section contains free ebooks and guides on cdma, some of the resources in this section can be viewed online and some of them can be downloaded.
It can accommodate more users per mhz of bandwidth than any other technology. Cdma technology telecommunications telecommunications. Tdma can easily adapt to transmission of data as well as voice communication. It allows multiple groups to share the same channel at the same time by assigning each group to different code. Ppt spread spectrum and cdma technology powerpoint presentation free to download id. Mobile technology presentation linkedin slideshare. Ppt cdma technology overview powerpoint presentation free. Gsm standard still evolving and improved with new features and services. Ppt cdma powerpoint presentation free to download id.
Code division multiple access cdma is a sort of multiplexing that facilitates various signals to occupy a single transmission channel. Code division multiple access cdma is a digital air interface standard, claiming eight to fifteen times the capacity of analog. May 01, 2020 chapter cdma code division multiple access, ppt, semester, engineering computer science engineering cse notes edurev is made by best teachers of computer science engineering cse. Phil flikkemas usf briefing introduction to spread spectrum pdf about the capacity of a ds spread spectrum cdma cellular system pdf overview of modulation techniques for wireless pdf. Some newer model analog phones also have this feature. Invented by hedy lamarr and george antheil in the 1940s, it was used to control the movement of torpedoes by means of using multiple radio frequencies. Mobile technology presentation what is a mobile device. C ode d ivision m ultiple a ccess cdma is a digital cellular technology used for mobile communication. Lucent technologies proprietary 29 wcdma physical layer processing channel separation uses ovsf codes ovsf is applied to achieve 3. Dec 05, 2012 mobile technology presentation what is a mobile device.
Ppt spread spectrum and cdma technology powerpoint. Individual conversations are encoded with the help of pseudorandom digital sequence. A free powerpoint ppt presentation displayed as a flash slide show on id. The general misconceptions of the wimax and 3g are. Aug 14, 2015 it can accommodate more users per mhz of bandwidth than any other technology. Mar 09, 2014 code division multiple access cdma is a digital air interface standard, claiming eight to fifteen times the capacity of analog. Wimax is a full duplex technology and wifi is a halfduplex technology. Cdma technology free download as powerpoint presentation.
Communication and cdma code division multiple access. Basics idea about cdma technology and its applications. The free modern technology powerpoint template will give your presentation a hitech interface look. Pdf and doc, mobile phone cloning full report ppt, mobile phone cloning technology report, mobile number portability ppt free download, mobile number portability pdf doc free download. It is an infographic powerpoint of shapes and colors, providing space and star network view. Ppt cdma technology powerpoint presentation free to download id. Cdma is the base on which access methods such as cdmaone, cdma2000, and wcdma are built. Cdma is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel.
Cdma technology overview lesson 5 power control, registration, and handoffs power control cdma power control cdma is an interferencelimited system based on the. The cdma is based on spread spectrum technology which makes the optimal use of available bandwidth. These slides can assist in discussing network and communication topics. The development of code division multiple access cdma enabled thirdgeneration 3g mobile system is also. It has gained widespread international acceptance by cellular radio system operators as an upgrade that will dramatically increase both their system capacity and the service quality. 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. To permit this without undue interference between the users, cdma. Mobile phone cloning seminar and ppt with pdf report. Free download 4g technology powerpoint presentation slides. Cdma technology is the property of its rightful owner. How does it support more than one group in the same channel. Oct 10, 2011 it suggests that this technology map can be extended to include access technologies for transmission at more than 50 mbits for fast moving users as well as ultra wide band systems for wide area coverage. This is done in gsm via gaussian minimum shift keying gmsk. Cdma issues so far, cdma looks like a step backwards.
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