CDMA

Power limited system

While people talking, random noise band playing occurs

Conversation need to be extracted from the background din

GP is high when people speak different languages, which is easier to distinguish individual speakers

It is difficult for distinguishing individuals, when GP is low.

The system performance will be degraded for every user when the number of users increases.

Fading would be reduced with wide frequency spectrum

Need to have separate multipath signals with different delays by “chip” unit.

TDMA

Receiving or transmission is allowed for only one user in a given slot

All slots are assigned cyclically

The transmission is non-continuous

It is essential to use digital data and modulation

Data rate overhead is between 20% – 30%

Overhead tradeoffs are size of data payload and latency

Multiple users are shared with single carrier frequency

Handoff is made simpler by using non-continuous transmission

All slots are assigned on demand

Due to reduced inter user interference, the power control is less stringent