Vikas is a good friend and co-entrepreneur who engages uncertainty like me (don’t wish to wed it!) . He wanted to know the capacity of CDMA and what made it better. While I am not a expert on what is best for the mobile MAC (Medium Access Protocol) enviroment, CDMA does take advantage of many phenomenon that occur in wireless cellular networks -
- Relax Bandwidth Capacity - Unlike TDMA, there is no hard limit on the bandwidth. One can trade off the SNR (Signal to Noise Ratio) to accomodate addtional users.
- Voice Activity Dection – Since humans talk only 35% time of time, it does cause enable to increase the the capacity by almost 5-6 folds in CDMA. However it does not hold true if you are downloading rich media. Design so much depends on the Traffic pattern, no wonder my Advisor keeps asking me – “What traffic pattern are you assuming?”
There are a several other aspects and a small post would not do justice to it. The best place to start is at the source paper : Overview of Cellular CDMA that appeard in the IEE transactions on Vehicular technology in May 1991.