27 February 2018

Features of CDMA

The main features of the CDMA system are given below :

  • The CDMA system users share the same frequency either  TDD or FDD can be used.
  • CDMA has a soft capacity limit.
  • In the CDMA system the number of users increases, the system performance decreases.
  • While using in CDMA system near-far problem arises at the receiver end.
  • Multipath fading can be reduced as the signal is spread over a large spectrum.
  • CDMA is an interference-limited system.
  • Higher frequency reuse. 
  • CDMA uses the co-channel cell.  So the spatial diversity can be used to provide soft handoff.
  • The channel data rates are very high. Hence, the symbol duration is short and less than the channel delay spread. A rake receiver can be used to improve the reception by collecting a time-delayed version of the required signal.
  • CDMA is a protocol implemented in a wireless network device. It is the most famous protocol and implemented in all over the world because it offers several advantages.
  • There is not a sheer cutoff in the number of users that it can support unlike TDMA full form or any other traditional cellular device. 
  • TDMA and FDMA both systems are suffering from hard hand-off. CDMA system has to eliminate the hard handoff by using a technique logically labeled the soft hand-off. 
  • CDMA has a too much higher user capacity than that of the TDMA disadvantages or FDMA disadvantages system.
  • CDMA is a secures its signals by encoding the user transmission in a unique code.