Check out these definitions from WhatIs.com: 1. FDMA (frequency division multiple access) 2. TDMA (time division multiple access) 3. CDMA (Code-Division Multiple Access) Well these are all the technologies which are used for the mobile or wireless communication. And all of them came one after another. All of these are the good technology of their time.First about the Time Division Multiple Access, this is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. Disadvantage of time and bandwidth. And also the data stolen problem. Then the Frequency division multiple access, which is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. FDMA In this the given bandwidth is dived into fixed number of frequencies horizontally. And in this also the one frequency is assigned to individual users; it will remain idle, if that user is not sending any data. In this also there is bandwidth and time wastage. Here also data stolen problem Then after that a new technology came i.e. Code Division Multiple Access that is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. FDMA In this the given bandwidth is dived into fixed number of frequencies horizontally. And in this also the one frequency is assigned to individual users; it will remain idle, if that user is not sending any data. In this also there is bandwidth and time wastage. Here also data stolen problem CDMA. This is the 3G technology. In this bandwidth is not divided into any thing. Data can be send to any frequency at any time by any user; there is not any fixed number of users. And the data steel problem is also solved. This technology is in use now a day. The new updating of the CDMA is WCDMA. In this all the good qualities of the TDMA, FDMA, and CDMA is used.

Check out these definitions from WhatIs.com: 1. <a href="http://searchmobilecomputing.techtarget.com/sDefinition/0,,sid40_gci213959,00.html">FDMA</a> (frequency division multiple access) 2. <a href="http://searchnetworking.techtarget.com/sDefinitio/0,,sid7_gci214175,00.html">TDMA</a> (time division multiple access) 3. <a href="http://searchtelecom.techtarget.com/sDefinition/0,,sid103_gci213842,00.html">CDMA</a> (Code-Division Multiple Access) Well these are all the technologies which are used for the mobile or wireless communication. And all of them came one after another. All of these are the good technology of their time.First about the Time Division Multiple Access, this is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. Disadvantage of time and bandwidth. And also the data stolen problem. Then the Frequency division multiple access, which is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. FDMA In this the given bandwidth is dived into fixed number of frequencies horizontally. And in this also the one frequency is assigned to individual users; it will remain idle, if that user is not sending any data. In this also there is bandwidth and time wastage. Here also data stolen problem Then after that a new technology came i.e. Code Division Multiple Access that is the acronym of TDMA. In this technology whole the frequency band is assigned vertically in the form of fixed number of slots to individual users for a specific time. FDMA In this the given bandwidth is dived into fixed number of frequencies horizontally. And in this also the one frequency is assigned to individual users; it will remain idle, if that user is not sending any data. In this also there is bandwidth and time wastage. Here also data stolen problem CDMA. This is the 3G technology. In this bandwidth is not divided into any thing. Data can be send to any frequency at any time by any user; there is not any fixed number of users. And the data steel problem is also solved. This technology is in use now a day. The new updating of the CDMA is WCDMA. In this all the good qualities of the TDMA, FDMA, and CDMA is used.