FDMA and TDMA channel band

[crazzy]

In TDMA the channel bandwidth required is Nfm where N is the number of users and fm is the bandwidth of each users. Then if it uses the same amount of bandwidth as fdma what is its superior over fdma

 

[manaman]

how come Nfm bandwidth requirmet will be fm itself ,In TDM you are going to distribute the chanel to N users over the time , say for first slot t1 will use the entire fm bandwith , for second slot t2 will be trasmitting while t1 is idle , refer hykins communication systems for a detailed description

 

[aboozar.hamidipoor]

in a simple experession you can serve more subscriber with TDMA method in your system because you use both time and frequency division simultanesly.

 

[jeffttan]

i think what ur saying is for FDMA not TDMA, in TDMA u allocate the whole bandwith to a single user for a time slot

 

[sureshsirpurapu]

I think you are mistaken in TDMA the badwidth is always fixed with a finite number of time slots these time slots are shared among the users and not the bandwidth. In FDMA the frequency is alloted so if you have N users then Nfm willbe the total banwidth. now if you consider the TDMA this whole Nfm is alloted to every useronly that a time slots are given

 

[airman]

if we used the TDMA with the same bandwidth of N*fm we can

1-improve the voice quality as we receive wide band of frequencies

2-we won't need to use a rack of filters ,but we will use only a specific filter ,as we use only one frequency.

3-in TDMA the signal is always a digital signal, so we can use computers in signal processing, but in FDMA the signal may be analog ,so we can't do so.

I wish that is what you need