Cdma capacity

CDMA allows up to 61 concurrent users in a 1.2288 MHz channel by processing each voice packet with two PN codes.

1. How the capacity can be increased in CDMA?
2. Why is CDMA said to have a soft capacity?
3. Which has more user capacity CDMA or FDMA?

How the capacity can be increased in CDMA?

In CDMA cellular systems with interference based admission control, the interference level resulting from the connected users in the cell affects the capacity and coverage of the cell and any reduction in interference converts directly into an increase in capacity.

Why is CDMA said to have a soft capacity?

CDMA Capacity

Capacity in CDMA is soft, CDMA has all users on each frequency and users are separated by code. This means, CDMA operates in the presence of noise and interference. In addition, neighboring cells use the same frequencies, which means no re-use. So, CDMA capacity calculations should be very simple.

Which has more user capacity CDMA or FDMA?

CDMA can provide up-to 20 times more traffic capacity than FDMA and 5.3 times more traffic capacity than TDMA.