1. Frequency Division Multiple Access (FDMA) : FDMA is channelization protocol in which bandwidth is divided into various frequency bands. Each station is allocated with band to send data and that band is reserved for particular station for all time which is as follows:
Difference between FDMA and CDMA :
Sr. No. | FDMA | CDMA |
---|---|---|
1. | FDMA stands for Frequency Division Multiple Access. | CDMA stands for Code Division Multiple Access. |
2. | Sharing of bandwidth among different stations takes place. | There is sharing of both i.e. bandwidth and time among different stations takes place. |
3. | There is no need of any codeword. | Codeword is necessary. |
4. | There is only need of guard bands between adjacent channels are necessary. | In this, both guard bands and guard time are necessary. |
5. | Variable transmission rate is difficult. | Variable transmission rate is easy.. |
6. | There is no Near-far problem. | There is existence of Near-far problem. |
7. | In this, power efficiency can be reduced. | In this, full power efficiency is required. |
8. | Capacity of system is low. | Capacity of system is large. |
9. | It is costly. | In this, only installation is costly and operating cost is low. |
10. | It is less flexible. | It is more flexible. |