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Cdma Gsm

  1. Sep 30, 2006 #1
    What is the difference between cdma and gsm mobile phones related to their working
  2. jcsd
  3. Sep 30, 2006 #2


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    GSM (Global System for Mobile communications) is the most widely used cell phone system or standard in the world, with over 2 billion subscribers. There are many differences beween GSM and CDMA, but at the grossest level it is this: GSM uses TDMA (time division multiple access), that is, it allocates users on a freqency channel to different time slots. CDMA (code division multiple access) transmits to/receives from multiple phones at the same time in the same frequency channel and separates them by encoding the signal streams with mathematically orthogonal codes.

    I suggest that you look CDMA, TDMA and GSM on Wikipedia for introductory material.
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