What is the diffidence between fdma, tdma and cdma?

FDMA: its stands for Frequency Devision multiplixer access which means devide the Baandwidth (TX,RX) into multiple frequency bands.

TDMA: its stands for Time devision Multiple access whice means deviding each frequency bands into multiple time slots such as (S0, S1, S2,.....ETC). but all of these time slots works at the same freq band.

CDMA: stands for code Devision Muliple access wich gives each user special code wether it was in the time or freq  another other user.

FDMA Graph. 

TDMA Graph: 

CDMA Graph: