FCA requires manual frequency planning, which is an arduous task in time-division multiple access (TDMA) and frequency-division multiple access (FDMA) based systems since such systems are highly sensitive to co-channel interference from nearby cells that are reusing the same channel.
If FCA is combined with conventional FDMA and perhaps or TDMA, a fixed number of voice channels can be transferred over the cell.
It is often enforced for the frequency bands used by Terminal Doppler Weather Radar[3][4] and C-Band satellite communication.
The misconfiguration of DFS had caused significant disruption in weather radar operation during early deployments of 5 GHz Wi-Fi in a number of countries in the world.
DCA also handles bursty cell traffic and utilizes the cellular radio resources more efficiently.
Thus the frequency channel allocation problem is relaxed in cellular networks based on a combination of spread spectrum and FDMA, for example IS95 and 3G systems.
Users in the overlap between the base station coverage area can be transferred between the cells (called cell-breathing), or the traffic can be regulated by admission control and traffic-shaping.
Especially OFDM modulation is an interesting alternative to spread spectrum because of its ability to combat multipath propagation for wideband channels without complex equalization.